SIMULATION OF FRACTURE PROCESS USING SPRING NETWORKS

Abstract eng:
The paper deals with a fracture simulation of a concrete. A specimen volume is discretized using two different types of spring networks - a truss lattice and a rigid-body-spring network. The first model is valuable for its simplicity, nodes are interconnected by ideally brittle springs bearing only an axial force. The paper shows that such model is not suitable for more difficult type of load (mixed-mode experiments). The second type, the rigid-body-spring network, is able to simulate fracture process even for mixed-mode experiments and does not loose a physical explanation for any part of modeling procedure. Unfortunately, both models exhibit a mesh size dependency, which is described in the paper via an extensive parameter study.

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