Elastoplastic shell analysis in DYNA3D

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Mechanical Engineering; (USA)

OSTI ID:5501713

Whirley, R G ^[1]

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1. Lawrence Livermore National Lab., CA (USA)

Computer simulation of the elastoplastic behavior of thin shell structures under transient dynamic loads play an important role in many programs at Lawrence Livermore National Laboratory (LLNL) in Livermore, Calif. Often the loads are severe and the structure undergoes plastic (or permanent) deformation. These simulations are effectively performed using DYNA3D, an explicit nonlinear finite element code developed at LLNL for simulating and analyzing the large-deformation dynamic response of solids and structures. It is generally applicable to problems where the loading and response are of short duration and contain significant high-frequency components. Typical problems of this type include the contact of two impacting bodies and the resulting elastoplastic structural behavior. The objective of this investigation was to examine and improve upon the elastoplastic shell modeling capability in DYNA3D. This article summarizes the development of a new four-node quadrilateral finite element shell formulation, the YASE shell, and compares two basic methods (the stress-resultant and the thickness-resultant methods) employed in elastoplastic constitutive algorithms for shell structure modeling.

• OSTI ID: 5501713
• Journal Information: Mechanical Engineering; (USA), Journal Name: Mechanical Engineering; (USA) Vol. 113:1; ISSN MEENA; ISSN 0025-6501
• Country of Publication: United States
• Language: English

Related Subjects

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COMPUTER CODES
COMPUTERIZED SIMULATION
CONTAINMENT
CONTAINMENT SHELLS
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ELASTICITY
FINITE ELEMENT METHOD
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
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REACTOR SAFETY
SAFETY
SIMULATION
TENSILE PROPERTIES