Abaqus Finite Element Analysis of Cyclic Loading on a ：在循环加载ABAQUS有限元分析.docVIP

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Abaqus Finite Element Analysis of Cyclic Loading on a ：在循环加载ABAQUS有限元分析.doc

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Abaqus Finite Element Analysis of Cyclic Loading on a ：在循环加载ABAQUS有限元分析

Accuracy of Fully Elastic vs. Elastic-Plastic Finite Element Analysis By: Nicholas Szwaja May 25, 2012 Masters of Engineering Project Proposal Submitted to the Graduate Faculty of Rensselaer Polytechnic Institute to Fulfill the Requirement for the Degree of Masters of Engineering, Mechanical Engineering Abstract The objective of this master of engineering final project is to investigate and analyze the accuracy of Finite Element Analysis (FEA) when it is used to compare fully elastic and elastic-plastic deformation in High Strength Steel (HSS). HSS, like many metals, displays a linear relationship between stress and strain until a yield point is reached [1]. At the yield point, if force is still applied, the material will plastically deform and will not regenerate to its original shape [2]. In the plastic range, the relationship between stress over strain is no longer linear [2]; as a result, as more force is applied to the material, the variable of strain increases in larger increments with respect to stress until the material fractures [2]. Elastic and/or plastic material properties can be used when performing FEA. Plasticity is primarily analyzed in plastics and certain composites because of their low modulus of elasticity [3] or forgings. In HSS, FEA analysis can be performed using fully elastic material properties, however this may not be the best analysis to perform. When using HSS to design a component, once the material goes beyond its yield point, permanent deformation will occur which, for a structural design typically results in failure of the component. To capture plastic deformation in FEA, tabular/experimental data of yield stress and strain in the plastic range is required to ensure the material can be deformed past the yield point and permanent deformation can be accurately analyzed. The tabular data is from Data Point Labs, Ithaca NY. This study will perform a comparison study to determine the accuracy of fully elastic versus elastic-plas