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摘要:
Mechanical joint interfaces widely exist in all kinds of components. Their properties are extremely complex as there are a variety of factors affecting contact characteristics such as material, surface roughness, processing method and heat treatment. This study investigated the static mechanical performances of joint interface under cyclic compression loads. A new joint model was established and described as one continuum with three layers of materials, wherein the joint interface was assumed as a layer of material with thickness h(c). Then the corresponding theoretical expressions of Total Equivalent Elastic Modulus (E-t) and Interface Equivalent Elastic Modulus (E-i) were proposed. A series of cyclic compression experiments were conducted. And the effects of loading stress, number of cycles and surface roughness on Et and Et was discussed respectively. Results indicated that Et increases first and then levels off with the stress increasing. Et approaches a steady state with the increasing number of cycles. And the modulus decreases with the increase of surface roughness of the joint interface. In addition, Et is a function of Et and the thickness of joint interface hc. The cumulative plastic strain occurs with a repeated loading on the joint interface.
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来源 :
MECHANICS & INDUSTRY
ISSN: 2257-7777
年份: 2017
期: 3
卷: 18
1 . 2 0 0
JCR@2022
ESI学科: ENGINEERING;
ESI高被引阀值:165
中科院分区:4