标准编号：ISO 15850:2014
中文名称：塑料 张力疲劳裂缝扩展测定 线性弹性断裂力学（LEFM）的方法
英文名称：Plastics — Determination of tension-tension fatigue crack propagation — Linear elastic fracture mechanics (LEFM) approach
发布日期：2014-02
标准范围
This International Standard specifies a method for measuring the propagation of a crack in a notchedspecimen subjected to a cyclic tensile load varying between a constant positive minimum and a constantpositive maximum value. The test results include the crack length as a function of the number of loadcycles and the crack length increase rate as a function of the stress intensity factor and energy releaserate at the crack tip. The possible occurrence of discontinuities in crack propagation is detected andreported.The test can be also used for the purpose of determining the resistance to crack propagation failure. Inthis case, the results can be presented in the form of number of cycles to failure or total time taken tocause crack propagation failure versus the stress intensity factor (see Annex A).The method is suitable for use with the following range of materials:— rigid and semi-rigid thermoplastic moulding and extrusion materials (including filled and shortfibre-reinforced compounds) plus rigid and semi-rigid thermoplastic sheets;— rigid and semi-rigid thermosetting materials (including filled and short-fibre-reinforced compounds)plus rigid and semi-rigid thermosetting sheets.
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