Accession Number : ADA182483

Title :   Thermoelastic Stress Analysis System.

Descriptive Note : Final rept. Sep 85-Nov 86,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG MATERIALS RESPONSE GROUP

Personal Author(s) : Reifsnider,Kenneth L ; Stinchcomb,Wayne W

PDF Url : ADA182483

Report Date : 07 Nov 1986

Pagination or Media Count : 16

Abstract : Perhaps the single most important experimental requirement for the evaluation of the mechanical behavior of engineering materials is the determination of stress distributions under load. Experimental stress analysis is the basis for much of the engineering research and development presently conducted on solid materials. If loads are applied synamically as in the cases of cyclic (fatigue) loading or vibration loading, measuring the full field stress distribution is greatly complicated. And secondly, when damage develops in materials, strong local gradients in stress result which are critically important in the determination of the remaining strength or life of the component. Damage development in composite materials under cyclic and dynamic loading is an especially important example of this special need. In the last few years a new device has been developed that has demonstrated the capability to measure such stress fields using the principal of adiabatic temperature change pattern analysis.

Descriptors :   *THERMAL STRESSES, *ELASTIC PROPERTIES, *STRESS ANALYSIS, CYCLES, DYNAMIC LOADS, LOADS(FORCES), ENGINEERING, MATERIALS, DISTRIBUTION, FIELD CONDITIONS, STRESSES, PATTERNS, VIBRATION, DETERMINATION, MECHANICAL PROPERTIES, SOLIDS, HEAT, COMPOSITE MATERIALS, NOTCH SENSITIVITY, STRESS TESTING, DAMAGE ASSESSMENT, LAMINATED PLASTICS

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE