The Fracture Energy and Some Mechanical Properties of a Polyurethane Elastomer
The Fracture Energy and Some Mechanical Properties of a Polyurethane Elastomer
复制标题
聚氨酯弹性体的断裂能和一些机械性能
DOI：
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
W. Knauss
中科院分区：
文献类型：
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作者：
H. Mueller;W. Knauss
测定了聚氨酯弹性体断裂时形成一个新表面单元所需的能量。材料的速率敏感性已通过在甲苯中溶胀而降低。本文主要介绍了断裂能下限测量的实验工作。以该值和蠕变柔量为基础，确定了未溶胀材料的断裂能与速率的关系。因此，它示出的断裂能的依赖性的裂纹扩展速率可以解释的能量耗散周围的裂纹尖端。率敏感断裂能的理论和实验确定的关系之间的良好协议被证明。
The energy required to form a unit of new surface in the fracture of a polyurethane elastomer is determined. The rate sensitivity of the material has been reduced by swelling it in toluene. This paper primarily describes the experimental work of measuring the lower limit of the fracture energy. With this value and the creep compliance as a basis, the rate dependence of fracture energy for the unswollen material has been determined. It is thus shown that the dependence of the fracture energy on the rate of crack propagation can be explained by energy dissipation around the tip of the crack. Good agreement between the theoretically and experimentally determined relationships for the rate-sensitive fracture energy is demonstrated.