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首页> 外文会议>Materials Science Technology Conference and Exhibition >A STUDY on FATIGUE CRACK CLOSURE BEHAVIOR in ALUMINUM ALLOY 7075 T6
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A STUDY on FATIGUE CRACK CLOSURE BEHAVIOR in ALUMINUM ALLOY 7075 T6

机译：铝合金7075 T6疲劳裂纹闭合行为研究

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In this study, fatigue tests were conducted on aluminum alloy 7075-T6 to study fatigue crack growth and crack closure behavior of the material. The experiments included the determination of the crack-opening levels K_(op) as a function of AK, the rate of fatigue crack growth da/dN as a function of ΔK_eff, where ΔK_eff (=K_(max)-K_(op)) is the effective stress intensity factor range. In addition, a change in the value of K_(op) due to the specimen-surface removal and a crack front shape were also investigated. It was concluded that the aluminum alloy 7075-T6 exhibits plasticity-induced fatigue crack closure. The crack growth rates and crack opening behavior were in good agreement with similar results in the literature.
机译：在该研究中，在铝合金7075-T6上进行疲劳试验，以研究材料的疲劳裂纹生长和裂纹闭合行为。实验包括确定作为AK的函数的裂缝开口水平K_（OP），疲劳裂纹生长速率DA / DN作为ΔK_eff的函数，其中ΔK_eff（= k_（max）-k_（op））是有效的应力强度因子范围。另外，还研究了由于样品 - 表面去除和裂纹前形状而导致的K_（OP）的变化。得出结论是，铝合金7075-T6表现出可塑性诱导的疲劳裂纹闭合。裂缝增长率和裂缝开放行为与文献中的类似结果吻合良好。

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