The synergism of the mechanics of nondestructive testing and the mechanics of materials response has great potential value in an era of rapid development of new materials and new applications for con ventional materials. The two areas are closely related and an advance in one area often leads to an advance in the other. As our understanding of basic principles increases, nondestructive testing is outgrowing the image of "black box techniques" and is rapidly becoming a legitimate technical area of science and engineering. At the present time, however, an understanding of the mechanics of nondestructive testing is lagging behind other advances in the field. The key to further development in the mechanics of nondestructive testing lies in the mechanics of the phenomena or response being investigated - a better understanding of materials response suggests better nondestructive test methods to investigate the response which, in turn, advances our understanding of materials response, and so on. With this approach in mind, the Materials Response Group of the Engineering Science and Mechanics Department at Virginia Polytechnic Institute and State University hosted a Conference on the Mechanics of Nondestructive Testing on September 10 through 12, 1980. Sponsors of the conference were the Army Research Office, the National Science Foundation, and the Engineering Science and Mechanics Department.

Inhalt
Session I Mechanics of Nondestructive Testing: Overview.- 1. Optical Interference for Deformation MeasurementsClassical, Holographic and Moiré Interferometry.- 2. Basic Wave Analysis of Acoustic Emission.- 3. A Survey of Electromagnetic Methods of Nondestructive Testing.- 4. Stiffness Change as a Nondestructive Damage Measurement.- 5. Concepts and Techniques for Ultrasonic Evaluation of Material Mechanical Properties.- Session II Material Property Determination.- 1. Neutron Diffraction and Small-Angle Scattering as Nondestructive Probes of the Microstructure of Materials.- 2. Determination of Fundamental Acoustic Emission Signal Characteristics.- 3. A Simple Determination of Von Karman Critical Velocities.- 4. Fracture Prediction by Rayleigh Wave Scattering Measurement.- 5. Anisotropic Elastic Constants of a Fiber-Reinforced Boron-Aluminum Composite.- 6. Nondestructive Evaluation of the Effects of Dynamic Stress Produced by High-Power Ultrasound in Materials.- Session III Defect and Flaw Characterization.- 1. The Mechanics of Vibrothermography.- 2. Dynamic Photoelasticity as an Aid to Sizing Surface Cracks by Frequency Analysis.- 3. Ultrasonic and X-Ray Radiographic Inspection and Characterization of Defects in Gr/Al Composites.- 4. Evaluation of Sensitivity of Ultrasonic Detection of Delaminations in Graphite/Epoxy Laminates.- Session IV Material Damage-Initiation and Growth: Life Prediction.- 1. Influence of Initial Defect Distribution on the Life of the Cold Leg Piping System.- 2. In-Flight Acoustic Emission Monitoring.- 3. On Interrelation of Fracture Mechanisms of Metals and Acoustic Emission.- 4. Fatigue Delamination in CFRP Composites: Study with Acoustic Emission and Ultrasonic Testing.