Evaluation of multiaxial low cycle fatigue cracks in Sn-8Zn-3Bi solder under non-proportional loading

Fumio Ogawa, Takamoto Itoh, Takaei Yamamoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Multiaxial low cycle fatigue damage of a lead-free solder Sn-8Zn-3Bi under non-proportional loading was evaluated. In non-proportional loading tests, a larger number of cracks were observed on the specimen surface compared to the proportional loading tests, and their directions were diverse due to direction change in stress and strain. In the circle loading test in which axial and shear strain have a 90° phase difference, the number of cracks rose from very early stage of the fatigue life, and their increasing rates were higher than those in a push-pull loading test. Apparently, non-proportionality of loading accelerates the formation of cracks and changes failure process during the tests.

Original languageEnglish
Pages (from-to)215-224
Number of pages10
JournalInternational Journal of Fatigue
Volume110
DOIs
Publication statusPublished - 2018 May

Keywords

  • Damage evaluation
  • Electronic materials
  • Low cycle fatigue
  • Multiaxial fatigue
  • Non-proportional loading

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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