首页> 外文会议>International PhD Symposium in Civil Engineering vol.2; 20040616-19; Delft(NL) >Stochastic modeling of cohesive crack evolution in concrete using meshless interpolation techniques
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Stochastic modeling of cohesive crack evolution in concrete using meshless interpolation techniques

机译:基于无网格插值技术的混凝土内聚裂纹扩展的随机建模

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In this paper a discrete crack propagation algorithm is presented which uses a meshless discretization of the domain based on the Natural Neighbor Interpolation. The cohesive crack behavior of concrete is modeled with the Fictitious Crack Model representing a force transmission over micro cracks. A stress-based and an energy-based crack propagation criterion are presented and analyzed with several numerical examples, whereby the latter one led to more stable results. The material uncertainties in concrete are modeled with random fields by obtaining the characteristic structural response with Latin Hypercube Sampling. Finally the applicability of the stochastic model for the presented crack simulation is shown on an example.
机译:本文提出了一种离散裂纹扩展算法,该算法使用基于自然邻域内插的无网格离散化域。用虚拟裂缝模型对混凝土的内聚裂缝行为进行建模,该模型表示力在微裂缝上的传递。提出了基于应力和基于能量的裂纹扩展准则,并通过几个数值示例进行了分析,从而使结果更稳定。通过使用拉丁超立方体采样获得特征结构响应,可利用随机场对混凝土中的材料不确定性进行建模。最后,在一个例子中显示了随机模型对提出的裂纹模拟的适用性。

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