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Title: A finite element formulation and adaptive solution approach for large-scale thermomechanical problems with complex contact conditions

Abstract

Traditional thermal stress analysis is based on an uncoupled approach in which the thermal problem is solved on a fixed geometry, and the resulting temperatures are then used to load a mechanical problem. In contrast, a fully coupled thermomechanical analysis solves the thermal problem on the deforming geometry and incorporates thermal loads into the mechanical problem. Thermal contact, in which heat flow paths depend on the mechanical deformations of adjacent surfaces, is a major component of many fully coupled thermomechanical analyses. This paper describes the development of a Lagrangian finite element thermomechanical contact methodology. The paper focuses on the formulation and implementation of thermal contact in two dimensions. The proposed approach accommodates arbitrarily large relative motions of contact surfaces, fully unstructured meshes, pressure-dependent contact resistance, conduction across small gaps, and approximate models for convection and radiation. The proposed thermal contact formulation has been implemented in the Lawrence Livermore National Laboratory public code PALM2D and has been used to solve a diverse set of thermomechanical problems. Examples frustrating the performance of this code on large deformation thermomechanical problems are presented and discussed.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10184496
Report Number(s):
UCRL-JC-112596; CONF-930785-3
ON: DE93019605
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 8. international conference on numerical methods in laminar and turbulent flow,Swansea (United Kingdom),18-23 Jul 1993; Other Information: PBD: 31 Mar 1993
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; THERMAL ANALYSIS; P CODES; STRESS ANALYSIS; DEFORMATION; FINITE ELEMENT METHOD; HEAT FLOW; MESH GENERATION; CONVECTION; INTERFACES; CONSERVATION LAWS; LINEAR MOMENTUM; ENERGY; THERMODYNAMICS; 420400; 661300; 990200; HEAT TRANSFER AND FLUID FLOW; OTHER ASPECTS OF PHYSICAL SCIENCE; MATHEMATICS AND COMPUTERS

Citation Formats

Engelmann, B E, Whirley, R G, and Raboin, P J. A finite element formulation and adaptive solution approach for large-scale thermomechanical problems with complex contact conditions. United States: N. p., 1993. Web.
Engelmann, B E, Whirley, R G, & Raboin, P J. A finite element formulation and adaptive solution approach for large-scale thermomechanical problems with complex contact conditions. United States.
Engelmann, B E, Whirley, R G, and Raboin, P J. 1993. "A finite element formulation and adaptive solution approach for large-scale thermomechanical problems with complex contact conditions". United States. https://www.osti.gov/servlets/purl/10184496.
@article{osti_10184496,
title = {A finite element formulation and adaptive solution approach for large-scale thermomechanical problems with complex contact conditions},
author = {Engelmann, B E and Whirley, R G and Raboin, P J},
abstractNote = {Traditional thermal stress analysis is based on an uncoupled approach in which the thermal problem is solved on a fixed geometry, and the resulting temperatures are then used to load a mechanical problem. In contrast, a fully coupled thermomechanical analysis solves the thermal problem on the deforming geometry and incorporates thermal loads into the mechanical problem. Thermal contact, in which heat flow paths depend on the mechanical deformations of adjacent surfaces, is a major component of many fully coupled thermomechanical analyses. This paper describes the development of a Lagrangian finite element thermomechanical contact methodology. The paper focuses on the formulation and implementation of thermal contact in two dimensions. The proposed approach accommodates arbitrarily large relative motions of contact surfaces, fully unstructured meshes, pressure-dependent contact resistance, conduction across small gaps, and approximate models for convection and radiation. The proposed thermal contact formulation has been implemented in the Lawrence Livermore National Laboratory public code PALM2D and has been used to solve a diverse set of thermomechanical problems. Examples frustrating the performance of this code on large deformation thermomechanical problems are presented and discussed.},
doi = {},
url = {https://www.osti.gov/biblio/10184496}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 31 00:00:00 EST 1993},
month = {Wed Mar 31 00:00:00 EST 1993}
}

Conference:
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