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HE Jun, WANG Haoyu, WANG Dawei, DING Yahong, LI Guoqing, ZHU Ling. Cause Analysis on Fracture of Titanium Alloy High Lock Bolts[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2020, 56(8): 66-69. DOI: 10.11973/lhjy-wl202008016
Citation: HE Jun, WANG Haoyu, WANG Dawei, DING Yahong, LI Guoqing, ZHU Ling. Cause Analysis on Fracture of Titanium Alloy High Lock Bolts[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2020, 56(8): 66-69. DOI: 10.11973/lhjy-wl202008016
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Cause Analysis on Fracture of Titanium Alloy High Lock Bolts

  • AVIC Chengdu Aircraft Industrial(Group) Co., Ltd., Chengdu 610091, China

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  • Received Date: January 01, 2020
    Graphical Abstract
    • Abstract
  • The titanium alloy high lock bolts of an aircraft fractured during assembly. The causes of bolts fracture were analyzed by means of macro analysis, micro analysis, metallographic examination, mechanical property recheck and assembly site investigation. The results show that the bolts were an overload fracture caused by single side bending stress, which has nothing to do with the bolts manufacturing quality. The operation space of the bolts assembly area was narrow, and the rotation plane of the wrench was prone to tilt during installation, thus formed bending stress on the bolt. It is suggested to improve the assembly tool.
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    • References (7)
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