论文标题
基于时间平均的异质材料中韧性同质化的方法
A temporal-averaging based approach to toughness homogenisation in heterogeneous material
论文作者
论文摘要
提出了一种定义有效裂缝韧性的新方法。这种时间平均方法是过程依赖性的，结合了裂纹速度和物质韧性。新技术的有效性在通过异质岩石具有周期性材料韧性的液压裂缝的背景下进行了研究。考虑到没有流体泄漏的平面应变模型，以更容易地研究不同的机制（韧性/粘度）。数值模拟用于检查新的均质化策略的有效性，并与最近所提供的最大韧性策略进行了比较。使用非常有效的（在房屋建造的）时间空间自适应求解器进行仿真。确定每个策略的有效制度。
A new approach to defining the effective fracture toughness for heterogeneous materials is proposed. This temporal averaging approach is process-dependent, incorporating the crack velocity and material toughness. The effectiveness of the new technique is investigated in the context of hydraulic fracture through heterogeneous rock with a periodic material toughness. The plane strain model is considered without fluid leak-off, to more easily investigate different regimes (toughness/viscosity). Numerical simulations are used to examine the effectiveness of the new homogenisation strategy, with comparison against the recently-proposed maximum toughness strategy. Simulations are conducted using an extremely effective (in house-built) time-space adaptive solver. The regimes in which each strategy is effective are determined.
