Bio


Professor Chang's primary research interest is in the areas of multi-functional materials and intelligent structures with particular emphases on structural health monitoring, intelligent self-sensing diagnostics, and multifunctional energy storage composites for transportation vehicles as well as safety-critical assets and medical devices. His specialties include embedded sensors and stretchable sensor networks with built-in self-diagnostics, integrated diagnostics and prognostics, damage tolerance and failure analysis for composite materials, and advanced multi-physics computational methods for multi-functional structures. Most of his work involves system integration and multi-disciplinary engineering in structural mechanics, electrical engineering, signal processing, and multi-scale fabrication of materials. His recent research topics include: Multifunctional energy storage composites, Integrated health management for aircraft structures, bio-inspired intelligent sensory materials for fly-by-feel autonomous vehicles, active sensing diagnostics for composite structures, self-diagnostics for high-temperature materials, etc.

Academic Appointments


  • Professor, Aeronautics and Astronautics
  • Member, Bio-X

Honors & Awards


  • Life-Time Achievement Award, Society of Prognostic Health Management (2018)
  • Life-Time Achievement Award, SPIE NDE/SHM (2010)
  • Best Paper Award, 7th International National Workshop on Structural Health Monitoring (2009)
  • Best Paper Award, 3rd European Workshop on Structural Health Monitoring (2006)
  • Structural Health Monitoring (SHM) Lifetime Achievement Award, The Boeing Company (2004)
  • Presidential Young Investigator Award, National Science Foundation (1988)

Boards, Advisory Committees, Professional Organizations


  • Editor-in-Chief, Int. J. of Structural Health Monitoring (2012 - Present)
  • Fellow, American Institute of Aeronautics and Astronautics (2013 - Present)
  • Fellow, American Society of Mechanical Engineers (2013 - Present)

Professional Education


  • PhD, Michigan (1983)

2019-20 Courses


Stanford Advisees


  • Doctoral Dissertation Reader (AC)
    Ruiqi Chen, Gift Nyikayaramba
  • Postdoctoral Faculty Sponsor
    Mohammad Faisal Haider, Amir Nasrollahi
  • Doctoral Dissertation Advisor (AC)
    Anthony Bombik, Xiyuan Chen, Sara Ha, Cheng Liu, Elliot Ransom, Tanay Topac, Jihan Zhuang
  • Master's Program Advisor
    Frank Kozel, Gavin Liu, Roshan Nair, Akshay Nalla

All Publications


  • Development of High Performance BS-PT Based Piezoelectric Transducer for Structural Health Monitoring of High-Temperature Polymer-Matrix Composite Structures Li, Y. -H., Kim, S. -J., Nardari, R., Oropeza, D., Chang, F. -K 2013
  • Sensor Network Configuration Effect on Detection Sensitivity of an Acousto-Ultrasound-based Active SHM System Janapati, V., Kopsaftopoulos, F., Roy, S., Mueller, I., Lee, S., J., Ladpli, P., Chang, F. 2013
  • Screen Printed Piezoceramic Actuators/Sensors Microfabricated on Organic Films and Stretchable Networks Salowitz, N., Guo, Z., Kim, S. -J., Li, Y. -H, Lanzara, G., Chang, F. -K 2013
  • Monitoring Transverse Matrix Cracking in Composite Laminates Using Ultrasonic Guided Waves Larrosa, C., Chang, F. -K 2013
  • Structural damage detection using ultrasonic guided waves under varying ambient temperature and loading environments Roy, S., Ladpli, P., Lonkar, P., Chang, F. -K 2013
  • A vision on stretchable bio-inspired networks for intelligent structures Salowitz, N., Guo, Z., Roy, S., Nardari, R., Li, Y. -H, Kopsaftopoulos, F., Chang, F. 2013
  • Bio-inspired stretchable network-based intelligent composites JOURNAL OF COMPOSITE MATERIALS Salowitz, N., Guo, Z., Li, Y., Kim, K., Lanzara, G., Chang, F. 2013; 47 (1): 97-105
  • A structural health monitoring fastener for tracking fatigue crack growth in bolted metallic joints STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL Rakow, A., Chang, F. 2012; 11 (3): 253-267
  • Real-time prediction of impact-induced damage for composite structures based on failure analysis and efficient database methods Roy, S., Mueller, I., Janapati, V., Das, S., Chang, F. -K 2012
  • A Model-assisted Integrated Diagnostics for Structural Health Monitoring Lonkar, K., Janapati, V., Roy, S., Chang, F. -K 2012
  • Bio-inspired intelligent sensing materials for fly-by-feel autonomous vehicles Salowitz, N., Guo, Z., Kim, S., J., Li, Y. -H, Lanzara, G., Chang, F. -K 2012
  • Real time in-situ damage classification, quantification and diagnosis for composite structures Larrosa, C., Chang, F. -K 2012
  • Strain/Elongation Sensitive Metal-Coated Polyimide Microwires for Micro-Scaled Highly Expandable Sensor Networks Lanzara, G., Guo, Z., Salowitz, N., Chang, F. -K 2012
  • Design of Optimal Layout of Active Sensing Diagnostic Network for Achieving Highest Damage Detection Capability in Structures Janapati, V., Lonkar, K., Chang, F., K. 2012
  • Characterization of temperature, load and damage effects using piezo-electric transducer patches based on fuzzy clustering Lopes, V., Gonsalez, C., da Silva, S., Roy, S., Kode, K., Sunor, F., Chang, F. 2011
  • Micro-Fabricated, Expandable Temperature Sensor Network for Macro-Scale Deployment in Composite Structures Guo, Z., Kim, K., Lanzara, G., Salowitz, N., Peumans, P., Chang, F. -K 2011
  • Physics Based Temperature Compensation Strategy for Structural Health Monitoring 8th International Workshop on Structural Health Monitoring Roy, S., Lonkar, K., JANAPATI, V., Chang, F. DESTECH PUBLICATIONS, INC. 2011: 1139–1149
  • A Robust Impact Force Determination Technique for Complex Structures Mueller, I., Vonnieda, K., Das, S., Chang, F. -K 2011
  • Accelerated aging experiments for prognostics of damage growth in composite materials Saxena, A., Goebel, K., Larrosa, C., Janapati, V., Roy, S., Chang, F. -K 2011
  • Development of a bio-inspired stretchable network for intelligent composites Salowitz, N., Guo, Z., Li, Y. -H, Kim, K., Lanzara, G., Chen, Y., Chang, F. 2011
  • On the Performance Quantification of Active Sensing SHM Systems using Model-assisted POD Methods Mueller, I., Janapati, V., Banerjee, S., Lonkar, K., Roy, S., Chang, F. -K 2011
  • Development of SEM-based PESEA Code for Modeling PZT Induced Acousto-ultrasonic Waves Propagating in Metallic & Composite Structures Lonkar, K., Chang, F. -K 2011
  • High Temperature Intelligent Composites Li, Y. -H., Kim, S. -J., Salowitz, N., Roy, S., Larrosa, C., Janapati, V., Chang, F. 2011
  • Damage classification in composite laminates, matrix micro-cracking and delamination Larrosa, C., Lonkar, K., Shankar, S., Chang, F. -K 2011
  • In-situ damage assessment of composite laminates via active sensor networks Larrosa, C., Janapati, V., Roy, S., Chang, F. -K 2011
  • Bio-Inspired Smart Skin Based on Expandable Network Guo, Z., Kim, K., Lanzara, G., Salowitz, N., Peumans, P., Chang, F. -K 2011
  • A Spider-Web-Like Highly Expandable Sensor Network for Multifunctional Materials ADVANCED MATERIALS Lanzara, G., Salowitz, N., Guo, Z., Chang, F. 2010; 22 (41): 4643-4648

    View details for DOI 10.1002/adma.201000661

    View details for Web of Science ID 000284002600014

    View details for PubMedID 20824665

  • Editorial-2009 Technology Review and Update: Selected Highlights from IWSHM 2009 STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL Chang, F., Guemes, A. 2010; 9 (3): 197-198
  • Adhesive Layer Effects on PZT-induced Lamb Waves at Elevated Temperatures STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL Ha, S., Lonkar, K., Mittal, A., Chang, F. 2010; 9 (3): 247-256
  • Prediction of Progressive Damage State at the Hot Spots using Statistical Estimation JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Banerjee, S., Qing, X. P., Beard, S., Chang, F. 2010; 21 (6): 595-605
  • Adhesive interface layer effects in PZT-induced Lamb wave propagation SMART MATERIALS AND STRUCTURES Ha, S., Chang, F. 2010; 19 (2)
  • Sensor Network Optimization for a Passive Sensing Impact Detection Technique STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL Markmiller, J. F., Chang, F. 2010; 9 (1): 25-39
  • The Needs for SHM Technology Classification Mueller, I., Chang, F. -K 2010
  • A Spider Web-Like Highly Expandable Sensor Network Advanced Materials Lanzara, G., Salowitz, N., Guo, Z., Chang, F. -K 2010; 41 (22): 44643-4648.
  • An Integrated Health Management System for Real-Time Impact Monitoring and Prediction of Impact-Induced Damage on Composite Structures Mueller, I., Das, S., Roy, S., Janapati, V., Vonnieda, K., Zhang, D., Chang, F. 2010
  • Optimizing a spectral element for modeling PZT-induced Lamb wave propagation in thin plates SMART MATERIALS & STRUCTURES Ha, S., Chang, F. 2010; 19 (1)
  • Design and characterization of a carbon-nanotube-reinforced adhesive coating for piezoelectric ceramic discs SMART MATERIALS & STRUCTURES Lanzara, G., Chang, F. 2009; 18 (12)
  • Development of a real-time active pipeline integrity detection system SMART MATERIALS & STRUCTURES Qing, X. P., Beard, S., Shen, S. B., Banerjee, S., Bradley, I., Salama, M. M., Chang, F. 2009; 18 (11)
  • Influence of Interface Degradation on the Performance of Piezoelectric Actuators JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Lanzara, G., Yoon, Y., Kim, Y., Chang, F. 2009; 20 (14): 1699-1710
  • Optimal placement of sensors for sub-surface fatigue crack monitoring THEORETICAL AND APPLIED FRACTURE MECHANICS Teo, Y. H., Chiu, W. K., Chang, F. K., Rajic, N. 2009; 52 (1): 40-49
  • Damage Detection for Composite Laminate Plates with A Distributed Hybrid PZT/FBG Sensor Network JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Wu, Z., Qing, X. P., Chang, F. 2009; 20 (9): 1069-1077
  • The effects of structural variations on the health monitoring of composite structures International Workshop on Structural Assessment of Composite Structures Chiu, W. K., Tian, T., Chang, F. K. ELSEVIER SCI LTD. 2009: 121–40
  • An integrated health management and prognostic technology for composites airframe structures Mueller, I., Larrosa, C., Roy, S., Mittal, A., Lonkar, K., Chang, F. -K 2009
  • A robust structural health monitoring technique for airframe structures Mueller, I., Chang, F. -K, Roy, S., Mittal, A., Lonkar, K., Larrosa, C. 2009
  • An integrated diagnostic to prognostic SHM technology for structural health management Mueller, I., Larrosa, C., Roy, S., Chang, F. -K 2009
  • Model-Based Impact Monitoring by Inverse Methods using Particle Swarm Optimization Mueller, I., Chang, F. -K 2009
  • Adhesive Layer Effects on Temperature-sensitive Lamb Waves Induced by Surface-mounted PZT Acutators Ha, S., Mittal, A., Lonkar, K., Chang, F. -K 2009
  • SACL Activities in Structural Health Monitoring Guo, Z., Mueller, I., Lanzara, G., Janapala, N., Lonkar, K., Mittal, A., Chang, F. 2009
  • Design of Planar Electrodes for Multifunctional Piezoelectric Sensors Salowitz, N., Lanzara, G., Guo, Z., Rose, J., Chang, F. -K 2009
  • Multifunctional Sensor Nodes in Stretchable Network for Structural Health Monitoring Lanzara, G., Salowitz, N., Guo, Z., Chatterjee, D., Kim, K., Peumans, P., Chang, F. 2009
  • Health monitoring of bonded composite repair in bridge rehabilitation SMART MATERIALS AND STRUCTURES Wu, Z., Qing, X. P., Ghosh, K., Karbhar, V., Chang, F. 2008; 17 (4)
  • In vitro atherosclerotic plaque characterization by acoustic impedance monitoring, Part I: Sensor modeling, design, and fabrication JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Dugnani, R., Chang, F. K. 2008; 19 (7): 815-826
  • Time-domain spectral element method for built-in piezoelectric-actuator-induced lamb wave propagation analysis AIAA JOURNAL Kim, Y., Ha, S., Chang, F. 2008; 46 (3): 591-600

    View details for DOI 10.2514/1.27046

    View details for Web of Science ID 000253403200006

  • Energy absorption features of 3-D braided rectangular composite under different strain rates compressive loading AEROSPACE SCIENCE AND TECHNOLOGY Gu, B., Chang, F. 2007; 11 (7-8): 535-545
  • Built-in sensor network for structural health monitoring of composite structure JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Qing, X. P., Beard, S. J., Kumar, A., Ooi, T. K., Chang, F. 2007; 18 (1): 39-49
  • Detection of bolt loosening in C-C composite thermal protection panels: I. Diagnostic principle SMART MATERIALS AND STRUCTURES Yang, J. Y., Chang, F. K. 2006; 15 (2): 581-590
  • Detection of bolt loosening in C-C composite thermal protection panels: II. Experimental verification SMART MATERIALS AND STRUCTURES Yang, J. K., Chang, F. K. 2006; 15 (2): 591-599
  • Debond detection using embedded piezoelectric elements in reinforced concrete structures - Part I: Experiment STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL Wu, F., Chang, F. K. 2006; 5 (1): 5-15
  • A hybrid piezoelectric/fiber optic diagnostic system for structural health monitoring 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure Qing, X. L., Kumar, A., Zhang, C., Gonzalez, I. F., Guo, G. P., Chang, F. K. IOP PUBLISHING LTD. 2005: S98–S103
  • Scattering of plate waves by a cylindrical inhomogeneity JOURNAL OF SOUND AND VIBRATION Wang, C. H., Chang, F. K. 2005; 282 (1-2): 429-451
  • Detection and monitoring of hidden fatigue crack growth using a built-in piezoelectric sensor/actuator network: I. Diagnostics SMART MATERIALS & STRUCTURES Ihn, J. B., Chang, F. K. 2004; 13 (3): 609-620
  • Detection and monitoring of hidden fatigue crack growth using a built-in piezoelectric sensor/actuator network: II. Validation using riveted joints and repair patches SMART MATERIALS & STRUCTURES Ihn, J. B., Chang, F. K. 2004; 13 (3): 621-630
  • A synthetic time-reversal imaging method for structural health monitoring SMART MATERIALS & STRUCTURES Wang, C. H., Rose, J. T., Chang, F. K. 2004; 13 (2): 415-423
  • Ferroelectric and piezoelectric properties of disk shape lead zirconate titanate thick films MATERIALS TRANSACTIONS Iijima, T., Ito, S., Matsuda, H., Dugnani, R., Chang, F. K. 2004; 45 (2): 233-235
  • Damage tolerance of notched composite laminates with reinforcing strips JOURNAL OF COMPOSITE MATERIALS Qing, X. L., Chang, F. K., Starnes, J. 2003; 37 (2): 111-128
  • Vibration analysis of delaminated composite beams and plates using a higher-order finite element INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES Hu, N., Fukunaga, H., Kameyama, M., Aramaki, Y., Chang, F. K. 2002; 44 (7): 1479-1503
  • Magneto-rheological fluid dampers for control of bridges ASME International Mechanical Engineering Congress and Exposition Gordaninejad, F., Saiidi, M., Hansen, B. C., Ericksen, E. O., Chang, F. K. SAGE PUBLICATIONS LTD. 2002: 167–80
  • Energy absorption of braided composite tubes INTERNATIONAL JOURNAL OF CRASHWORTHINESS Beard, S. J., Chang, F. K. 2002; 7 (2): 191-206
  • Design of braided composites for energy absorption JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS Beard, S., Chang, F. K. 2002; 15 (1): 3-12
  • Structural damage identification using piezoelectric sensors INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES Fukunaga, H., Hu, N., Chang, F. K. 2002; 39 (2): 393-418
  • The manufacture of composite structures with a built-in network of piezoceramics COMPOSITES SCIENCE AND TECHNOLOGY Lin, M., Chang, F. K. 2002; 62 (7-8): 919-939
  • The response of composite joints with bolt-clamping loads, Part II: Model verification JOURNAL OF COMPOSITE MATERIALS Sun, H. T., Chang, F. K., Qing, X. L. 2002; 36 (1): 69-92
  • The response of composite joints with bolt-clamping loads, Part 1: Model development JOURNAL OF COMPOSITE MATERIALS Sun, H. T., Chang, F. K., Qing, X. L. 2002; 36 (1): 47-67
  • Structural health monitoring from fiber-reinforced composites to steel-reinforced concrete European COST F3 Conference on System Identification and Structural Health Monitoring Wang, C. S., Wu, F., Chang, F. K. IOP PUBLISHING LTD. 2001: 548–52
  • Impact identification of stiffened composite panels: II. Implementation studies SMART MATERIALS & STRUCTURES Seydel, R., Chang, F. K. 2001; 10 (2): 370-379
  • Characterization of matrix crack-induced laminate failure - Part II: Analysis and verifications JOURNAL OF COMPOSITE MATERIALS Johnson, P., Chang, F. K. 2001; 35 (22): 2037-2074
  • Characterization of matrix crack-induced laminate failure - Part I: Experiments JOURNAL OF COMPOSITE MATERIALS Johnson, P., Chang, F. K. 2001; 35 (22): 2009-2035
  • Modelling of splitting and delamination in notched cross-ply laminates COMPOSITES SCIENCE AND TECHNOLOGY Wisnom, M. R., Chang, F. K. 2000; 60 (15): 2849-2856
  • Experimental study on clamping effects on the tensile strength of composite plates with a bolt-filled hole COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING Yan, Y., Wen, W. D., Chang, F. K., Shyprykevich, P. 1999; 30 (10): 1215-1229
  • Identifying impacts in composite plates with piezoelectric strain sensors, Part II: Experiment JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Tracy, M., Chang, F. K. 1998; 9 (11): 929-937
  • Structural health monitoring JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Pines, D. J., Chang, F. K. 1998; 9 (11): 875-875
  • Identifying impacts in composite plates with piezoelectric strain sensors, Part I: Theory JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Tracy, M., Chang, F. K. 1998; 9 (11): 920-928
  • Composite hip prosthesis design .1. Analysis JOURNAL OF BIOMEDICAL MATERIALS RESEARCH Yildiz, H., Ha, S. K., Chang, F. K. 1998; 39 (1): 92-101

    Abstract

    An investigation was performed to study the mechanical performance of fiber-reinforced composite hip prostheses in a femur. The main objective of the study was to evaluate the effect of fiber orientation of a composite femoral implant on the response of the surrounding femoral bone. A three-dimensional finite element analysis was developed for analyzing a composite implant in the femur. A three-dimensional composite element was proposed to take into account ply drop-off due to a change of cross-section of the composite implant. The element could accommodate multidirectional layers and tapered composites. The material properties of the composite were treated as anisotropic and inhomogeneous while the properties of femoral bone were treated as anisotropic and homogenous. All the materials were assumed to behave linear-elastically. The thermoplastic graphite/PEEK material system was selected for the study. In this presentation, as the first part of the study, the development of the finite element analysis will be described. Numerical calculations were generated and compared with existing data and numerical results available from studies related to metal hip prostheses in the literature. Experiments on the composite hip implants were also conducted for further verification of the analysis and the computer simulations. In Part II, using the finite element code, an extensive study was performed to evaluate the stress/strain distributions, micromotions, and strain-energy density of the surrounding femoral bone, which have been related to initial fixation and long-term stability of the prosthesis in a femoral bone. Numerous fiber orientations were studied, and results of the calculations were compared with those generated by the prosthesis made of cobalt alloy and titanium alloy.

    View details for Web of Science ID 000070995300012

    View details for PubMedID 9429101

  • Identification of impact force and location using distributed sensors AIAA JOURNAL Choi, K. Y., Chang, F. K. 1996; 34 (1): 136-142
  • Strength envelope of bolted composite joints under bypass loads JOURNAL OF COMPOSITE MATERIALS Hung, C. L., Chang, F. K. 1996; 30 (13): 1402-1435
  • Bearing failure of bolted composite joints .2. Model and verification JOURNAL OF COMPOSITE MATERIALS Hung, C. L., Chang, F. K. 1996; 30 (12): 1359-1400
  • IDENTIFYING DELAMINATION IN COMPOSITE BEAMS USING BUILT-IN PIEZOELECTRICS .1. EXPERIMENTS AND ANALYSIS JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Keilers, C. H., Chang, F. K. 1995; 6 (5): 649-663
  • IDENTIFYING DELAMINATION IN COMPOSITE BEAMS USING BUILT-IN PIEZOELECTRICS .2. AN IDENTIFICATION METHOD JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES Keilers, C. H., Chang, F. K. 1995; 6 (5): 664-672
  • AN ACCUMULATIVE DAMAGE MODEL FOR TENSILE AND SHEAR FAILURES OF LAMINATED COMPOSITE PLATES JOURNAL OF COMPOSITE MATERIALS Shahid, I., Chang, F. K. 1995; 29 (7): 926-981
  • PREDICTING SCALING EFFECT ON THE NOTCHED STRENGTH OF PREPREG AND FIBER TOW-PLACED LAMINATED COMPOSITES JOURNAL OF COMPOSITE MATERIALS Shahid, I., Sun, H. T., Chang, F. K. 1995; 29 (8): 1063-1095
  • MATRIX CRACKING AND DELAMINATION IN LAMINATED COMPOSITE BEAMS SUBJECTED TO A TRANSVERSE CONCENTRATED LINE LOAD JOURNAL OF COMPOSITE MATERIALS Sheng, L., KUTLU, Z., Chang, F. K. 1993; 27 (5): 436-470
  • MODELING COMPRESSION FAILURE OF LAMINATED COMPOSITES CONTAINING MULTIPLE THROUGH-THE-WIDTH DELAMINATIONS JOURNAL OF COMPOSITE MATERIALS KUTLU, Z., Chang, F. K. 1992; 26 (3): 350-387
  • A MODEL FOR PREDICTING DAMAGE IN GRAPHITE EPOXY LAMINATED COMPOSITES RESULTING FROM LOW-VELOCITY POINT IMPACT JOURNAL OF COMPOSITE MATERIALS Choi, H. Y., Chang, F. K. 1992; 26 (14): 2134-2169
  • IMPACT DAMAGE RESISTANCE OF GRAPHITE EPOXY LAMINATED COMPOSITES POLYMER COMPOSITES - 90 CONF Choi, H. Y., Chang, F. K. SOC PLASTICS ENG INC. 1991: 1294–1300
  • A NEW APPROACH TOWARD UNDERSTANDING DAMAGE MECHANISMS AND MECHANICS OF LAMINATED COMPOSITES DUE TO LOW-VELOCITY IMPACT .2. ANALYSIS JOURNAL OF COMPOSITE MATERIALS Choi, H. Y., WU, H. Y., Chang, F. K. 1991; 25 (8): 1012-1038
  • A NEW APPROACH TOWARD UNDERSTANDING DAMAGE MECHANISMS AND MECHANICS OF LAMINATED COMPOSITES DUE TO LOW-VELOCITY IMPACT .1. EXPERIMENTS JOURNAL OF COMPOSITE MATERIALS Choi, H. Y., DOWNS, R. J., Chang, F. K. 1991; 25 (8): 992-1011
  • MODELING THE VISCOPLASTIC BEHAVIOR OF FIBER-REINFORCED THERMOPLASTIC MATRIX COMPOSITES AT ELEVATED-TEMPERATURES JOURNAL OF COMPOSITE MATERIALS Ha, S. K., Wang, Q. L., Chang, F. K. 1991; 25 (4): 334-374
  • DAMAGE TOLERANCE OF LAMINATED COMPOSITES CONTAINING AN OPEN HOLE AND SUBJECTED TO TENSILE LOADINGS JOURNAL OF COMPOSITE MATERIALS Chang, K. Y., Liu, S., Chang, F. K. 1991; 25 (3): 274-301
  • EFFECT OF LOAD DISTRIBUTION ON THE FIBER BUCKLING STRENGTH OF UNIDIRECTIONAL COMPOSITES JOURNAL OF COMPOSITE MATERIALS Lessard, L. B., Chang, F. K. 1991; 25 (1): 65-87
  • DAMAGE TOLERANCE OF LAMINATED COMPOSITES CONTAINING AN OPEN HOLE AND SUBJECTED TO COMPRESSIVE LOADINGS .2. EXPERIMENT JOURNAL OF COMPOSITE MATERIALS Lessard, L. B., Chang, F. K. 1991; 25 (1): 44-64
  • DAMAGE TOLERANCE OF LAMINATED COMPOSITES CONTAINING AN OPEN HOLE AND SUBJECTED TO COMPRESSIVE LOADINGS .1. ANALYSIS JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Lessard, L. B. 1991; 25 (1): 2-43
  • STUDY ON IMPACT DAMAGE IN LAMINATED COMPOSITES 1989 ARMY SYMP ON SOLID MECHANICS : MECHANICS OF ENGINEERED MATERIALS AND APPLICATIONS Chang, F. K., Choi, H. Y., Jeng, S. T. ELSEVIER SCIENCE BV. 1990: 83–95
  • ANALYSIS OF THICK LAMINATED COMPOSITES JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Perez, J. L., Chang, K. Y. 1990; 24 (8): 801-822
  • DELAMINATION EFFECTS ON COMPOSITE SHELLS JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME Chang, F. K., KUTLU, Z. 1990; 112 (3): 336-340
  • STIFFNESS AND STRENGTH TAILORING OF A HIP-PROSTHESIS MADE OF ADVANCED COMPOSITE-MATERIALS JOURNAL OF BIOMEDICAL MATERIALS RESEARCH Chang, F. K., Perez, J. L., Davidson, J. A. 1990; 24 (7): 873-899

    Abstract

    This work is concerned with the design of hip prostheses using advanced fiber reinforced composite materials. The major focus of the study is to evaluate how the stiffness and strength of composite hip prostheses can be affected by variations in ply orientation and stacking sequence for a selected manufacturing method. This investigation involved both analytical and experimental work. An analytical model was developed which consists of a stress analysis and a failure analysis. A finite element program was developed during the course of the investigation for analyzing stresses, strains, and deformations of composite stems with a simplified configuration. Failure and mode of failure were predicted by appropriately selected failure criteria. Experiments were also performed on T300/976 graphite/epoxy composites to verify the analysis and the computer calculations. Both testing and analysis accounted for the various combinations of in-plane and out-of-plane (torsion) loading that can act on the prosthetic hip. Simplified composite stems with a 120 layer thickness were fabricated and tested. An excellent agreement was found between the measured strain data and the numerical calculations. Using the program, parametric studies were performed. It was found that an optimal design of hip stems can be achieved by using advanced fiber-reinforced composite materials, but great care must be taken when selecting the appropriate ply orientation and stacking sequence for a chosen fabrication method.

    View details for Web of Science ID A1990DK01300006

    View details for PubMedID 2398076

  • CHARACTERIZATION OF IMPACT DAMAGE IN LAMINATED COMPOSITES SAMPE JOURNAL Chang, F. K., Choi, H. Y., Jeng, S. T. 1990; 26 (1): 18-25
  • STUDY ON THE CRUSHING RESPONSE OF CYLINDRICAL COMPOSITE SHELLS SUBJECTED TO TRANSVERSE LOADING JOURNAL OF COMPOSITES TECHNOLOGY & RESEARCH Chang, F. K., KUTLU, Z. 1990; 12 (4): 239-244
  • PREDICTING MODULI AND STRENGTHS REDUCTION OF UNIDIRECTIONAL GRAPHITE EPOXY COMPOSITES DUE TO HYGROTHERMAL EFFECTS JOURNAL OF REINFORCED PLASTICS AND COMPOSITES Chang, F. K., Shahid, I., ENGDAHL, R. A. 1989; 8 (2): 106-132
  • STRENGTH AND RESPONSE OF CYLINDRICAL COMPOSITE SHELLS SUBJECTED TO OUT-OF-PLANE LOADINGS JOURNAL OF COMPOSITE MATERIALS Chang, F. K., KUTLU, Z. 1989; 23 (1): 11-31
  • TRANSIENT DYNAMIC ANALYSIS OF LAMINATED COMPOSITE PLATES SUBJECTED TO TRANSVERSE IMPACT COMPUTERS & STRUCTURES WU, H. Y., Chang, F. K. 1989; 31 (3): 453-466
  • MODELING OF UNIDIRECTIONAL PREFORMED COMPOSITES JOURNAL OF REINFORCED PLASTICS AND COMPOSITES Chang, F. K., Chang, K. Y., Engdahl, R. 1988; 7 (6): 582-600
  • COMPRESSION RESPONSE OF LAMINATED COMPOSITES CONTAINING AN OPEN HOLE SAMPE QUARTERLY-SOCIETY FOR THE ADVANCEMENT OF MATERIAL AND PROCESS ENGINEERING Chang, F. K., Lessard, L., Tang, J. M. 1988; 19 (4): 46-51
  • POST-FAILURE ANALYSIS OF BOLTED COMPOSITE JOINTS IN TENSION OR SHEAR-OUT MODE FAILURE JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Chang, K. Y. 1987; 21 (9): 809-833
  • A PROGRESSIVE DAMAGE MODEL FOR LAMINATED COMPOSITES CONTAINING STRESS-CONCENTRATIONS JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Chang, K. Y. 1987; 21 (9): 834-855
  • THE INSITU PLY SHEARSTRENGTH DISTRIBUTIONS IN GRAPHITE - EPOXY LAMINATED COMPOSITES JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Chen, M. H. 1987; 21 (8): 708-733
  • DESIGN OF COMPOSITE LAMINATES CONTAINING PIN LOADED HOLES JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Scott, R. A., Springer, G. S. 1984; 18 (3): 279-289
  • FAILURE STRENGTH OF NONLINEARLY ELASTIC COMPOSITE LAMINATES CONTAINING A PIN LOADED HOLE JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Scott, R. A., Springer, G. S. 1984; 18 (5): 464-477
  • FAILURE OF COMPOSITE LAMINATES CONTAINING PIN LOADED HOLES - METHOD OF SOLUTION JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Scott, R. A., Springer, G. S. 1984; 18 (3): 255-278
  • THE EFFECT OF LAMINATE CONFIGURATION ON CHARACTERISTIC LENGTHS AND RAIL SHEAR-STRENGTH JOURNAL OF COMPOSITE MATERIALS Chang, F. K., Scott, R. A., Springer, G. S. 1984; 18 (3): 290-296