Applicability of stress singularity parameter for evaluating adhesive strength of coating film. (Phase 1). Adhesive strength evaluation of plasma sprayed coatings by tesile pin test.
Applicability of stress singularity parameter for evaluating adhesive strength of coating film. (Phase 1). Adhesive strength evaluation of plasma sprayed coatings by tesile pin test.
复制标题
应力奇异参数评价涂膜附着力的适用性
DOI：
10.2207/qjjws.9.167
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
M. Tsukamoto
中科院分区：
文献类型：
--
作者：
Y. Inoue;Akira Noutomi;Toyoaki Ono;Akio Izuha;M. Toyoda;M. Tsukamoto
从评价喷涂涂层粘接强度的试验方法中选择拉伸销试验，设计了一种评价涂层粘接强度的方法。所得结果总结如下：1)销钉试验得到的断裂净应力（σnet）cr受涂层厚度和销钉直径的影响，不能作为粘结强度的指标。2)在引脚试验涂层边缘附近，载荷方向上的应力σy与涂层边缘到引脚中心距离x的平方根成反比。这种应力奇异性表示为：σy= κ/√x = FI×σnet/√x，其中κ是表示奇异应力场大小的指标。3)利用应力奇异性参数kcr对销体试验结果进行整理，得到了不考虑涂层厚度和销体直径变化的通用值，说明利用kcr可以定量评价粘接强度。
Selecting the tensile pin test from among the test procedures for evaluating the adhesive strength of sprayed coatings, the authors devised an adhesive strength evaluation technique.The results obtained are summarized as follows;1) The fracture net stress (σnet)cr obtained by the pin test is influenced by the coating thickness and pin diameter, and thus dose not necessarily use as an index of the adhesive strength.2) In the vicinity of the coating edge of the pin test, the stress σy in load direction is inversely proportional to the square root of the distance x from the coating edge to the center of pin.This stress singularity is expressed as follows; σy= κ/√x = FI×σnet/√x in which κ is an index representing the size of the field of singular stress.3) The pin test results, when sorted out using the stress singularity parameter kcr universal values were given regardless of changes in coating thickness and pin diameter, suggesting that employing kcr enables the adhesive strength to be quantitatively evaluated.