Investigation on fatigue damage mechanism of wire ropes and its application to life prediction

2015 Fiscal Year Final Research Report

• Project/Area Number: 24561007
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Earth system and resources enginnering
• Research Institution: National Institute of Occupational Safety and Health, Japan
• Principal Investigator: SASAKI Tetsuya 独立行政法人労働安全衛生総合研究所, 機械システム安全研究グループ, 上席研究員 (60358413)
• Co-Investigator(Kenkyū-buntansha): HONDA Takashi 独立行政法人労働安全衛生総合研究所, 機械システム安全研究グループ, 上席研究員 (80358415) ; YAMAGUCHI Atsushi 独立行政法人労働安全衛生総合研究所, 機械システム安全研究グループ, 研究員 (20541048)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: ワイヤロープ / 疲労 / 内部損傷

Outline of Final Research Achievements

In case of the fatigue failure of wire ropes, it used to be believed that outer element wires tend to be damaged before the inner element wires are damaged. However, recent investigation revealed that in case of IWRC ropes, the fatigue damage of inner element wires would precede than that of outer element wires. In this study, S-shaped fatigue tests were conducted using some types of IWRC wire ropes. Fretting fatigue tests using element wires were also carried out. These fatigue tests revealed that the filler type and the Warrington Seale type had different fatigue damage mode although the fatigue damage of the inner element wires preceded in both types. It was also revealed that compressive load between element wires had primary influence on fretting fatigue damage between element wires.

Free Research Field

構造信頼性工学、材料力学