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首页> 外文期刊>Ocean Engineering >Simulation of ship collision and grounding damage using Hosford-Coulomb fracture model for shell elements
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Simulation of ship collision and grounding damage using Hosford-Coulomb fracture model for shell elements

机译：使用Hosford-Coulomb壳单元断裂模型模拟船舶碰撞和着陆损伤

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The predictive capabilities of the Hosford-Coulomb ductile fracture model for shell elements were evaluated by simulating the penetration of stiffened panel test models. The plasticity and ductile fracture of the test model material, S235JR grade steel, were modeled using the results of tests reported in the literature, which consisted of dog bone, notched tension, central hole tension, and shear experiments. The loading paths to ductile fracture initiation were extracted from finite element analyses with very fine solid element meshes. The Hosford-Coulomb fracture model parameters were identified using the extracted loading paths and adopting a linear damage accumulation law. Using the concept of the Domain of Shell-to-Solid Equivalence, the calibrated fracture model was extended to shell finite elements. Subsequently, the fracture model was used to simulate the stiffened panel penetration tests. The calibrated fracture model provides an accurate estimation of ductile fracture initiation and ductile crack propagation while being relatively mesh-insensitive for the particular problem considered.
机译：Hosford-Coulomb延性断裂模型对壳单元的预测能力通过模拟加劲板测试模型的穿透性来评估。使用文献报道的测试结果对测试模型材料S235JR级钢的塑性和韧性断裂进行建模，这些测试结果包括狗骨头，缺口拉力，中心孔拉力和剪切实验。用非常精细的实体单元网格从有限元分析中提取了延性断裂开始的加载路径。使用提取的载荷路径并采用线性损伤累积定律来确定Hosford-Coulomb断裂模型参数。使用壳对固等效域的概念，将标定的断裂模型扩展到壳有限元。随后，将断裂模型用于模拟加固面板的渗透试验。校准后的裂缝模型可准确估算延性裂缝的萌生和延性裂纹的扩展，同时对考虑的特定问题相对网格不敏感。

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