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首页> 外文期刊>Journal of Applied Polymer Science >Kinetic energy corrections for slip-stick behavior in brittle adhesives
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Kinetic energy corrections for slip-stick behavior in brittle adhesives

机译：动能校正，用于脆性胶粘剂的粘滑行为

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摘要

Fracture mechanics is the study of the failure of a body that contains a flaw. In the energy balance approach to fracture mechanics, contributions from the external work and elastic strain energy are accounted for, but rarely are corrections for the kinetic energy given. Under slip-stick conditions, part of the external work is expended as kinetic energy. The magnitude of this kinetic energy depends upon the shape of the crack. A specimen with a blunt crack will fail at a high load, and the crack will catastrophically travel through the material until the kinetic energy is dissipated. Material with a sharp crack will fail at a lower load but will still be catastrophic in nature. In this work kinetic term is incorporated into the energy balance approach. This term accounts for the Of the moving crack and how far the crack travels before arresting. This correction makes the shape of the initiation crack irrelevant. When applied to data generated by tapered double cantilever beam specimens under slip-stick conditions, the scatter in the measured critical strain energy release rate is significantly reduced. (C) 2002 Wiley Periodicals, Inc. [References: 17]
机译：断裂力学是对包含缺陷的物体失效的研究。在断裂力学的能量平衡方法中，考虑了外部功和弹性应变能的贡献，但很少给出对动能的修正。在粘滑状态下，一部分外部功被消耗为动能。动能的大小取决于裂纹的形状。带有钝裂纹的样品将在高载荷下失效，并且裂纹将灾难性地穿过材料，直到动能耗散为止。具有尖锐裂纹的材料将在较低载荷下失效，但本质上仍将是灾难性的。在这项工作中，动力学术语被并入能量平衡方法中。这个术语解释了移动中的裂纹以及裂纹在停止前行进了多远。该校正使得初始裂纹的形状无关紧要。当应用于在滑移条件下由锥形双悬臂梁试样产生的数据时，在测量的临界应变能释放速率中的散射将大大降低。 （C）2002 Wiley Periodicals，Inc. [参考：17]

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