Effects of Overload on Threshold Stress Intensity Factor Range of A7075

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  • 過大荷重がA7075の下限界応力拡大係数範囲に及ぼす影響
  • カダイ カジュウ ガ A7075 ノ カゲンカイ オウリョク カクダイ ケイスウ ハンイ ニ オヨボス エイキョウ

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Abstract

This paper describes the effects of overload on the ΔKth of aluminum alloy. Tensile or compressive overload was applied to compact tension specimen, subsequently fatigue tests were carried out at stress ratio R=0. 1. The main conclusions are as follows; (1) The value of ΔKth increased with increasing of the tensile overload. (2) The effect of compressive overload on ΔKth was small. (3) The effect of overload on ΔKth depends on neither the yield strength nor Young's modulus.

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