Strain hardening in the HEMP code
The Prandtl--Reuss equations used in the HEMP elastic-plastic computer program are satisfied exactly for elastic, perfectly plastic materials, and are less exact for materials that strain harden. A new method is described for incorporating strain hardening into the flow law that is exact for linear strain hardening and very nearly exact for nonlinear strain hardenlng. A tensile test of a strain-hardening material is simulated using the present method and the previous method. The original approximate method has an accumulated error of less than 2% when compared with the present method. The present method agrees with exact calculations to within 0.05%. (auth)
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-29-004781
- OSTI ID:
- 4393725
- Report Number(s):
- UCID--16328
- Country of Publication:
- United States
- Language:
- English
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