Damage Tolerance and Durability of Material Systems

KENNETH L. REIFSNIDER and SCOTT W. CASE are members of the engineering faculty at the Virginia Polytechnic Institute and State University, Blacksburg, Virginia.

• Preface. Introduction: Basic Thesis. I.1 Elements of the Approach. I.2 Basic Concepts. I.3 Nonuniform Stress States: Characteristic Material Dimensions. I.4 Strength Evolution. I.5 Outline of the Methodology. I.6 Virtual Design. References. 1 Physical Behavior. 1.1 Continuous-Fiber Composite Materials. 1.2 Damage Tolerance and Durability. 1.3 Damage Modes and Failure Modes. 1.4 Summary of Concepts. References. 2 Engineering Concepts of Strength. 2.1 Factors That Determine Composite Material Strength. 2.2 Strength under Multiaxial Loading. 2.3 Failure Functions for Damage Accumulation. References. Exercises. 3 Strength Evolution. 3.1 Nature of the Problem. 3.2 Progressive Failure. 3.3 Failure Modes. 3.4 Remaining Strength under Long-Term Loading. 3.5 Features of Strength Evolution Integral. 3.6 Summary of Approach. References. Exercises. 4 Micromechanical Models of Composite Stiffness and Strength. 4.1 Axial Tensile Strength of Unidirectional Composites. 4.2 Compression Strength. 4.3 Transverse Strength and Shear Strength. References. Exercises. 5 Stiffness Evolution. 5.1 Problem Definition. 5.2 Stiffness Change Due to Matrix Cracking. 5.3 Time-Dependent Stiffness Change. 5.4 Temperature-Dependent Stiffness Change. 5.5 Summary. References. Exercises. 6 Strength Evolution During Damage Accumulation. 6.1 Problem Definition. 6.2 Factors That Influence Strength. 6.3 Models of Strength Evolution. 6.4 Application Example. References. Exercises. 7 Nonuniform Stress States. 7.1 Problem Definition. 7.2 Laminate Edge-Related Stresses. 7.3 Undamaged Notched Strength. 7.4 Notched Strength After Damage. 7.5 Fracture Mechanics and Energy Methods. References. Exercises. 8 Example Applications and Case Studies. 8.1 Example: Unnotched Failure of Polymer Composite. 8.2 Case Study 1: Fatigue Behavior of APC-2 Laminates. 8.3 Case Study 2: Elevated-Temperature Fatigue Behavior of Graphite Fiber-PPS Laminates. 8.4 Case Study 3: Elevated-Temperature Fatigue Behavior of Nextel 610.... Alumina-Yttria Composites. 8.5 Case Study 4: Elevated-Temperature Fatigue Behavior of Nicalon-Enhanced SiC Composites. 8.6 Case Study 5: Fatigue Failure of a Structural Composite Shape. 8.7 Summary. References. Appendix to Chapter 1. Index.

"...the authors should be congratulated for producing a well-organised, well-written, useful book that nay materials and structures engineer and basic and applied science researchers should know, own and use in their professional activities..." (Corrision Reviews) "...a useful reference..." (AIAA Journal, Vol. 40, No. 10, October 2002)