Analysis of Biaxial Stress Fields in Plates Cracking at Elevated Temperatures
Abstract
Enhanced theories for thermographic stress analysis of isotropic and anisotropic materials are developed. These stress analysis techniques involve the measurement of the dynamic changes in temperature of a component undergoing dynamic loading. The enhanced theories presented allow for quantitative analyses of nonlinear thermoelastic and thermoplastic effects. A theory quantifying damage in anisotropic materials is also presented. From these analytical developments, several new applications for thermographic stress analysis are developed including residual stress analysis, cyclic plasticity analysis, and high-temperature stress analysis. A numerical method for separating the principal stresses is also developed. Examples of each of these applications are presented, and limitations for each are given. In particular, the principal problems encountered with regards to high-temperature stress analysis are discussed at length. Residual stress analyses were performed on a C-shaped specimen of Ti-6A1-4V alloy, and the minimum resolvable residual stress was found to be 25 MPa. Cyclic plasticity analyses of 1020 steel and 6061-T6 aluminum were performed. The data obtained were found to be in qualitative agreement with the enhanced theory. (rrh)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 19, 1989
- Accession Number
- ADA216271
Entities
People
- Bela I. Sandor
- Jon R. Lesniak
- Neal F. Enke
- Stanley S. Balish
Organizations
- University of Wisconsin–Madison