Finite element derivative recovery by moving least square interpolants
Finite element derivative recovery by moving least square interpolants
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DOI：
10.1016/0045-7825(94)90084-1
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发表时间：
1994-07
影响因子：
7.2
通讯作者：
M. Tabbara;T. Blacker;T. Belytschko
中科院分区：
文献类型：
--
作者：
M. Tabbara;T. Blacker;T. Belytschko
本文介绍了一种简单、准确的方法来回收细菌及其衍生物，如菌株。该技术是基于局部插值的节点位移使用移动最小二乘法。然后通过取该插值的适当导数来恢复菌株。线弹性和热传导的恢复导数的收敛性和精度的数值实验显示出非常好的结果和超收敛的应变在许多情况下，该技术也是有效的投影方法的位移插值。
A simple, accurate technique for recovery of displcements and derivatives, such as strains is presented. The technique is based on local interpolation of nodal displacements using a moving least square method. The strains are then recovered by taking appropriate derivatives of this interpolant. Numerical experiments in linear elasticity and heat conduction on the convergence and accuracy of the recovered derivatives show very good results and superconvergence for strains in many cases; the technique is also effective for displacement interpolation for projection methods.