Maxime Wetta, Jean-Benoit Kopp, Vincent Fournier, Louise Le Barbenchon, Philippe Viot, Stéphane Morel
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引用次数: 0
Abstract
This research delves into the fracture analysis of cellular thermosetting polymers using Mode I fracture tests with a compact tension geometry subjected to both monotonic and cyclic loadings. The equivalent linear elastic fracture mechanics concept effectively described crack initiation and propagation. Numerical simulations estimated the equivalent linear elastic crack length aligning with experimental measurements. Resistance curves revealed a transient regime followed by a self-similar regime with relatively constant fracture energy, typical of quasi-brittle materials. Finally, the fracture energy evolution correlated with macroscopic density evolution exhibiting a linear relationship relaying the influence of microstructure to a second order.
这项研究利用单调和循环载荷下的紧凑拉伸几何形状 I 型断裂试验，深入研究了蜂窝热固性聚合物的断裂分析。等效线性弹性断裂力学概念有效地描述了裂纹的产生和扩展。数值模拟估算出的等效线性弹性裂纹长度与实验测量结果一致。阻力曲线显示了一种瞬态机制，随后是断裂能相对恒定的自相似机制，这是准脆性材料的典型特征。最后，断裂能的演变与宏观密度的演变相关，表现出一种线性关系，将微观结构的影响反映到二阶。
期刊介绍：
Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.
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