Thermodynamically based Fictitious Crack/Interface Model for General Normal and Shear Loading
Thermodynamically based Fictitious Crack/Interface Model for General Normal and Shear Loading
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DOI：
10.1016/j.ijsolstr.2013.06.019
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发表时间：
2013-10
期刊：
影响因子：
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通讯作者：
M. Ristinmaa;N. S. Ottosen
中科院分区：
文献类型：
--
作者：
M. Ristinmaa;N. S. Ottosen
对于较小的变形，提出了考虑一般三维法向和剪切载荷的裂纹/界面模型。它涉及到弹性、塑性和损伤，是基于热力学的。该模型的一个基本特征是它与虚拟裂纹模型背后的概念的一致性。特别是，在裂纹开始之前没有裂纹变形发生，当裂纹刚刚开始时，所提出的模型提供了无限大的卸载刚度。对于相同的一组参数，证明了所提出的模型能够提供的预测是在广泛的加载情况下与混凝土的实验数据密切一致。
For small deformations a crack/interface model that considers general 3D normal and shear loading is proposed. It involves elasticity, plasticity and damage and it is thermodynamically based. An essential feature of the model is its consistency with the concepts behind the fictitious crack model. In particular, no crack deformation occurs before the crack is initiated and when a crack has just been initiated the proposed model provides an unloading stiffness that is infinitely large. For the same set of parameters, it is demonstrated that the proposed model is able to provide predictions that are in close agreement with experimental data for concrete for a wide range of loading situations.