A Novel Mechanical Method to Measure Shear Strength in Specimens Under Pressure
A new experimental apparatus has been developed for performing shear tests on specimens held under moderately high hydrostatic pressures (on the order of 4 GPa). This testing procedure experimentally determines the pressure-dependent shear strength of thin foil specimens. The experiments provide calibration data for models of materials subjected to extreme pressures such as the Steinberg-Guinan hardening model and can assist in model validation for discrete dislocation dynamics simulations, among others. This paper reports the development of the experimental procedures and the results of initial experiments on thin foils of polycrystalline Ta performed under hydrostatic pressures ranging from 1 to 4 GPa. Both yielding and hardening behavior of Ta are observed to be sensitive to the imposed pressure.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 895718
- Report Number(s):
- UCRL-PROC-220534; TRN: US200711%%284
- Resource Relation:
- Journal Volume: 929; Conference: Presented at: Materials Research Society Spring Meeting, San Francisco, CA, United States, Apr 16 - Apr 20, 2006
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrostatic pressure effect on mechanical behavior and texture evolution of Al and Brass
Application of a Multiscale Model of Tantalum Deformation at Megabar Pressures