Non-Relaxing Crack Growth and Fatigue in a Non-Crystallizing Rubber
Non-Relaxing Crack Growth and Fatigue in a Non-Crystallizing Rubber
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非结晶橡胶中的非松弛裂纹扩展和疲劳
DOI：
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发表时间：
1974
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通讯作者：
P. B. Lindley
中科院分区：
文献类型：
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作者：
P. B. Lindley
本文用撕裂能T研究了非结晶橡胶SBR的裂纹扩展行为。对于最小撕裂能为零的循环变形（松弛条件），获得了最大变形时每循环的生长与T之间的唯一关系。这种橡胶在恒定的撕裂能下也表现出裂纹增长。当循环的最小撕裂能不为零时，裂纹扩展速率与撕裂能的关系可以通过速率的标度叠加在松弛关系上，并对标度因子提出了初步的解释。疲劳数据与此一致。
Abstract The crack growth behavior of a non-crystallizing rubber, SBR, is investigated in terms of the tearing energy T, the energy available for crack growth. For cyclic deformations in which the minimum tearing energy is zero (relaxing conditions), a unique relationship is obtained between the growth per cycle and T at the maximum deformation. This rubber also exhibits crack growth at constant tearing energies. The relationship of the crack growth rate as a function of tearing energy, when the minimum tearing energy of the cycle is not zero, can be superimposed on the relaxing relationship by scaling the rates, and a tentative explanation is proposed for the scaling factor. Fatigue data are consistent with this.