SIMPLE LATTICE MODEL FOR NUMERICAL-SIMULATION OF FRACTURE OF CONCRETE MATERIALS AND STRUCTURES
SIMPLE LATTICE MODEL FOR NUMERICAL-SIMULATION OF FRACTURE OF CONCRETE MATERIALS AND STRUCTURES
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DOI：
10.1007/bf02472449
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发表时间：
1992-11-01
影响因子：
3.8
通讯作者：
VANMIER, JGM
中科院分区：
文献类型：
--
作者：
SCHLANGEN, E;VANMIER, JGM
本文提出了一种模拟混凝土和岩石等非均质材料断裂的数值模型。利用格构模型模拟了混凝土和其它材料中的典型破坏机制-裂缝面桥接。该模型可以在小尺度下使用，其中颗粒结构中的颗粒被生成并且聚集体、基质和键性质被分配给晶格元素。在这个尺度上的模拟对于研究材料成分的影响是有用的。此外，该模型似乎是一个很有前途的工具，用于模拟结构中的断裂。在这种情况下，材料的微观结构没有被详细地模拟，而是网格单元被赋予从一定分布中随机选择的拉伸强度。与实验室规模的标本上的实验相比，发现现实的裂纹图案。目前的结果表明，断裂机制模拟逼真。这非常重要，因为它简化了模型的调整。
In this paper a numerical model is presented for simulating fracture in heterogeneous materials such as concrete and rock. The typical failure mechanism, crack face bridging, found in concrete and other materials is simulated by use of a lattice model. The model can be used at a small scale, where the particles in the grain structure are generated and aggregate, matrix and bond properties are assigned to the lattice elements. Simulations at this scale are useful for studying the influence of material composition. In addition the model seems a promising tool for simulating fracture in structures. In this case the microstructure of the material is not mimicked in detail but rather the lattice elements are given tensile strengths which are randomly chosen out of a certain distribution. Realistic crack patterns are found compared with experiments on laboratory-scale specimens. The present results indicate that fracture mechanisms are simulated realistically. This is very important because it simplifies the tuning of the model.