Axisymmetric solid-of-revolution elements based on the assumed stress hybrid model |
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Authors: | Tian Zongshu |
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Institution: | (1) Graduate School, Academia Sinica, Beijing |
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Abstract: | A series of axisymmetric solid-of-revolution elements with 8-node and quadrilateral cross section have been developed based
on the assumed stress hybrid model. A quadratic boundary displacement assumption is employed for each element and a variety
of interior stress assumptions have been made. Two different kinds of procedure used for developing stress field have been
studied. Example problems of a thick-walled cylinder under internal pressure and a thick-walled sphere under internal pressure
are utilized to evaluate the various elements and a desirable stress assumption has been identified. Comparisons of present
results with those obtained by the use of 8-node element based on the assumed displacement model indicate that this hybrid
stress element is far superior in predicting the stress distribution. |
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Keywords: | axisymmetric hybrid stress method solid-of-revolution element kinematic deformation mode invariance |
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