An innovative approach for coupled thermomechanical analysis

Conference · Thu Aug 08 04:00:00 EDT 1991

OSTI ID:10138762

Whirley, R G; Engelmann, B E

This paper describes a staggered step formulation for coupled thermomechanical problems, and the implementation of this approach into a new nonlinear finite element code, PALM2D. The staggered step approach considers the coupled thermomechanical response of solids, including nonlinear effects in both the thermal and mechanical aspects. The thermal problem may include temperature dependent thermal conductivities and convection boundary conditions, and the mechanical problem may include large deformations and strains as well as material nonlinearities such as plasticity. Heat generation due to mechanical plastic deformation is incorporated into the energy equation, and the energy equation is solved on the current deformed geometry. Experience to date indicates that this approach allows an inexpensive solution to many strongly nonlinear fully coupled thermomechanical problems.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10138762
• Report Number(s): UCRL-JC--107866; CONF-911213--25; ON: DE92011467
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103
360203
360603
661300
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS
990200
ALGORITHMS
CONVECTION
DEFORMATION
EQUATIONS OF MOTION
FINITE ELEMENT METHOD
MATHEMATICS AND COMPUTERS
MECHANICAL PROPERTIES
OTHER ASPECTS OF PHYSICAL SCIENCE
P CODES
SOLIDS
STRAINS
TEMPERATURE EFFECTS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES