Shell Element Verification & Regression Problems for DYNA3D

Zywicz, E

关键词: BOUNDARY CONDITIONS;    DEGREES OF FREEDOM;    GEOMETRY;    IMPLEMENTATION;    PROBES;    STABILIZATION;    VERIFICATION;   

DOI  :  10.2172/926059
RP-ID  :  LLNL-TR-400974
PID  :  OSTI ID: 926059
Others  :  TRN: US200807%%584

学科分类：工程和技术（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

A series of quasi-static regression/verification problems were developed for the triangular and quadrilateral shell element formulations contained in Lawrence Livermore National Laboratory's explicit finite element program DYNA3D. Each regression problem imposes both displacement- and force-type boundary conditions to probe the five independent nodal degrees of freedom employed in the targeted formulation. When applicable, the finite element results are compared with small-strain linear-elastic closed-form reference solutions to verify select aspects of the formulations implementation. Although all problems in the suite depict the same geometry, material behavior, and loading conditions, each problem represents a unique combination of shell formulation, stabilization method, and integration rule. Collectively, the thirty-six new regression problems in the test suite cover nine different shell formulations, three hourglass stabilization methods, and three families of through-thickness integration rules.