A dual-parametric finite element method for cavitation in nonlinear elasticity

A dual-parametric finite element method for cavitation in nonlinear elasticity
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非线性弹性空化的双参数有限元方法

DOI:
10.1016/j.cam.2011.05.020
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发表时间:
2011-10
期刊:
J. Comput. Appl. Math.
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其他
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本文采用双参数有限元方法计算非线性弹性力学中二维空化问题的奇异值。该方法克服了有限元逼近具有极大扩张变形问题时普遍遇到的网格纠缠和材料互穿等困难。数值实验表明,该方法在空化问题的计算中具有较高的效率。通过对不具有径向对称性的离散问题的数值实验,表明了该方法在更一般情况下的有效性,以及它在研究非线性弹性材料空穴形核机制方面的应用潜力。
A dual-parametric finite element method is introduced in this paper for the computation of singular minimizers in the 2D cavitation problem in nonlinear elasticity. The method overcomes the difficulties, such as the mesh entanglement and material interpenetration, generally encountered in the finite element approximation of problems with extremely large expansionary deformation. Numerical experiments show that the method is highly efficient in the computation of cavitation problems. Numerical experiments are also conducted on discrete problems without the radial symmetry to show the validity of the method to more general settings and the potential of its application to the study of mechanism of cavity nucleation in nonlinear elastic materials.
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