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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >SPONTANEOUS RUPTURING ALONG A FRICTIONAL INTERFACE
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SPONTANEOUS RUPTURING ALONG A FRICTIONAL INTERFACE

机译：摩擦界面上的自发性破裂

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摘要

We designed a laboratory model to investigate the spontaneous rupturing along a frictionally held interface. A factional contact, which mimics a material interface or geological fault, is simulated using two photoelastic plastics plates (Homalite or Polycarbonate) held together by friction and compression. The pre-uniaxial static loading is exerted by a hydraulic press. A unique design used in our experiments, which starts the spontaneous rupturing, is the exploding wire technique. It triggers the rupture within a controlled environment while keeping the spontaneous nature of the rupturing. The fault is oblique to the compression axis to provide the shear driving force for continued rupturing. We performed the spontaneous rupturing experiment along an interface between both similar and dissimilar materials. Under proper loading conditions, a shear rupture which initially propagates at Rayleigh wave speed, jumps to a supershear speed (close to the longitudinal wave speed) after propagating a finite distance L in a similar material system. For the dissimilar material system, directionality of rupture propagation is observed. A rupture propagating at the Generalized Rayleigh wave speed is observed in the same direction as the sliding of the more compliant material and in the opposite direction, supershear rupture is possible under proper loading condition.
机译：我们设计了一个实验室模型来研究沿摩擦保持界面的自发破裂。模拟两个材料接触面或地质断层的派系接触，使用两个通过摩擦和压缩固定在一起的光弹性塑料板（Homalite或聚碳酸酯）进行模拟。预单轴静载荷由液压机施加。爆炸线技术是我们实验中使用的一种独特设计，它可以自发破裂。它在受控环境中触发破裂，同时保持破裂的自发性。断层相对于压缩轴倾斜，以提供剪切驱动力以继续破裂。我们沿着相似和不相似材料之间的界面进行了自发破裂实验。在适当的载荷条件下，最初以瑞利波速度传播的剪切破裂，在相似的材料系统中传播有限的距离L后，跳升至超剪切速度（接近纵向波速度）。对于不同的材料系统，观察到破裂传播的方向性。在与更顺应的材料滑动相同的方向上观察到以广义瑞利波速度传播的破裂，而在相反的方向上观察到，在适当的载荷条件下可能发生超剪切破裂。

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