대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제19권2호
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- Pages.486-494
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- 1995
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- 1225-5963(pISSN)
DOI QR Code
가상 변형률을 갖는 비적합 4절점 축대칭 요소
Incompatible finite Elements for Axisymmetric Structure with Assumed Strains
초록
This paper introduces two kinds of new four-node quadrilateral axisymmetric elements with independently-assumed strains. They are formulated by the modified Hellinger-Reissner principle so as to employ incompatible displacements and assumed strains. In one of the present elements, the strains from incompatible displacements are corrected to pass the constant strain patch test. The other contains incompatible functions that are obtained from the element boundary condition. The elements are evaluated on the several problems of bending and material incompressibility with regular and distorted meshes. The results show that the new element performs excellently in deformation and stress calculation.
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