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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >EFFECTS OF STRESS-RELIEVING SLOTS ON FRETTING FATIGUE BEHAVIOR OF TI-6AL-4V
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EFFECTS OF STRESS-RELIEVING SLOTS ON FRETTING FATIGUE BEHAVIOR OF TI-6AL-4V

机译：应力消除槽对TI-6AL-4V微动疲劳行为的影响

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摘要

Fretting is a complex phenomenon, it alters the stress and strain fields in the contact region between two bodies, due to micro-slip, which decreases the fatigue resistance of materials. This study investigates the effect of stress-relieving slots, machined in flat pads, on the fretting fatigue behavior of Ti-6A1-4V alloy. Three types of slots including U-notch, V-notch, and a simple hole were used. Conventional fretting fatigue model, involving a contact between a flat pad with rounded edges and a fatigue specimen loaded by a cyclic axial load, was used. Several fretting fatigue parameters such as the maximum tensile stress, Smith Watson Topper, Maximum Shear Stress Range, and MSSR parameters were considered for this study. The stress, strain, and displacement distribution in the contact region of fatigue specimen were computed using the finite element analysis code ABAQUS. The data were used to calculate the fretting fatigue parameters and evaluate the effectiveness of the slots in improving the fretting fatigue resistance. The analytical results were verified by the experimental data.
机译：微动是一种复杂的现象，由于微滑动，它改变了两个物体之间接触区域的应力和应变场，从而降低了材料的疲劳强度。这项研究调查了在平板中加工的应力消除槽对Ti-6A1-4V合金微动疲劳行为的影响。使用了三种类型的插槽，包括U形槽，V形槽和一个简单的孔。使用传统的微动疲劳模型，该模型涉及具有圆角边缘的平垫与承受循环轴向载荷的疲劳试样之间的接触。这项研究考虑了几个微动疲劳参数，例如最大拉伸应力，Smith Watson Topper，最大剪切应力范围和MSSR参数。使用有限元分析代码ABAQUS计算疲劳试样接触区域的应力，应变和位移分布。该数据用于计算微动疲劳参数，并评估槽在改善微动疲劳强度方面的有效性。实验数据验证了分析结果。

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