대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)
- 제23권7호
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- Pages.1205-1214
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- 1999
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- 1226-4873(pISSN)
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- 2288-5226(eISSN)
DOI QR Code
효과적인 열응력 해석을 위한 사각형 추가 변형률 요소의 개발
Development of a Quadrilateral Enhanced Assumed Strain Element for Efficient and Accurate Thermal Stress Analysis
- 발행 : 1999.07.01
초록
A new quadrilateral plane stress element is developed for efficient and accurate analysis of thermal stress problems. It is convenient to use the same mesh and the same shape functions for thermal analysis and stress analysis. But, because of the inconsistency between deformation related strain field and thermal strain field, oscillatory responses and considerable errors in stresses are resulted in. To avoid undesired oscillations, strain approximation is enhanced by supplementing several assumed strain terms based on the variational principle. Thermal deformation is incorporated into the generalized mixed variational principle for displacement, strain and stress fields, and basic equations for the modified enhanced assumed strain method are derived. For the stress approximation of bilinear elements, the
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