Theoretical-numerical Approaches to Simulate Fracture in Polymeric Materials☆

Theoretical-numerical Approaches to Simulate Fracture in Polymeric Materials☆
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模拟聚合物材料断裂的理论数值方法â

DOI:
10.1016/j.mspro.2014.06.334
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发表时间:
2014
期刊:
Procedia Materials Science
影响因子:
--
通讯作者:
Özenç
Özenç
中科院分区:
--
文献类型:
--
作者:
Kaliske;Behnke;Fleischhauer;Özenç

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通常应避免结构断裂,或者,如果预期用于气囊或剥离箔,则断裂应沿预定义的裂纹路径沿着发生。必须确保部件在结构寿命期间的完整性和可用性。为了在设计阶段优化结构,模拟允许分析和预测结构行为,以开发最佳布局。手头的贡献提出了适当的材料建模策略的聚合物,并介绍了所谓的非弹性和有限应变的构型力的方法作为一种方法来分析能量释放率,裂纹的进展和裂纹扩展方向。某些数值方法,如凝聚力元素,包含例如非弹性凝聚力区模型和节点分裂方法与r-自适应离散相结合,显示为有价值的模拟功能。
Fracture in structures is usually to be avoided or, if intended like for airbags or peel foils, it should occur along a predefined crack path. The integrity and usability of a part has to be ensured over the lifetime of the structure. In order to optimize a structure at the design stage, simulations allow to analyze and to predict the structural behavior for a development of the best layout. The contribution at hand presents appropriated material modeling strategies for polymers and introduces the so-called configurational force approach for inelasticity and finite strains as a method to analyze the energy release rate, the crack advancement and the crack growth direction. Certain numerical methods like cohesive elements, containing e.g. inelastic cohesive zone models and the node splitting approach combined with an r-adaptive discretization are shown as valuable simulation features.
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