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Validating A Finite Element Model With Ansys Workbench For Isotruss® Structures Subject To Uniaxial Compression, Hanna B. Opdahl
Validating A Finite Element Model With Ansys Workbench For Isotruss® Structures Subject To Uniaxial Compression, Hanna B. Opdahl
Utah Space Grant Consortium
The purpose of this study is to develop, verify, and validate a finite element (FE) model of IsoTruss® structures subject to uniaxial compression. The FE model is implemented in ANSYS WorkBench and verified using axial stiffness and critical buckling loads that are derived from traditional mechanics. The buckling failure modes include global buckling and local bay buckling. The predictions from the FE model and mechanics calculations are validated by experimental data generated in preceding studies. Results indicate that the effective material modulus is highly affected by variations in manufacturing. Adjustment factors are applied to the nominal material properties to accurately …