A model for a solid undergoing rate-independent dissipative mechanical processes
Abstract
A thermodynamic framework is proposed to capture the dissipative response of metals. In contrast to the conventional practice, a stressed reference configuration is assumed instead of a stress-free configuration. The second law of thermodynamics is converted into equality by prescribing a non-negative rate of dissipation function. Stress in the reference configuration evolves with time to satisfy the second law of thermodynamics. Appropriate constitutive prescriptions are made to model the experimentally observed cyclic response of metals such as mild steel, aluminum alloy, and titanium, to uniaxial loading. An appropriate choice of material parameters captures well the experimentally observed response for different loading protocols.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 01, 2020
- Source ID
- 10.1177/1081286520951921
Entities
People
- Keshav Bharadwaj
- Kumbakonam Ramamani Rajagopal
- Roshan M Tom
- Umakanthan Saravanan
Organizations
- Indian Institute of Technology Madras
- Office of Naval Research
- Science and Engineering Research Board
- Texas A&M University