Probabilistic finite element analysis of fatigue life of additively manufactureclasp

Kento Odaka, Naoki Takano, Hideo Takizawa, Satoru Matsunaga

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The present study was aimed to develop a probabilistic finite element method (FEM) that predicts the variability in the fatigue life of additively manufactured clasp so that it can be used as a virtual test in the design phase before manufacturing. Titanium alloy (Ti-6Al-4V) clasp with integrated chucking part, which was designed for experimental fatigue test to validate the computational method, was investigated. To predict the lower bound, an initial spherical defect was assumed in the region where stress concentration was predicted. The Smith-Watson-Topper (SWT) method, Bäumel & Seeger rule, elasto-plastic FEM, and zooming FEM were used. The influence of assumed initial defect on the fatigue life was significant, and the large variability in the fatigue life was predicted. This study demonstrated that the proposed practical computational method can simulate the large variability in the fatigue life of titanium alloy clasp, which is useful in its design before manufacturing.

Original languageEnglish
Article numberdmj/2021-174
Pages (from-to)286-294
Number of pages9
JournalDental Materials Journal
Issue number2
Publication statusPublished - 2022


  • Additive manufacturing
  • Clasp
  • Fatigue life
  • Finite element method

ASJC Scopus subject areas

  • Ceramics and Composites
  • General Dentistry


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