Evaluation of notch geometry design by fracture energy method for forgeability test

Rong Shean Lee, Yen Ju Chen

Research output: Contribution to journalArticlepeer-review


Upsetting tests are widely used for forgeability test. When testing materials with high ductility, fracture may not occur on the specimen. Thus, it is necessary to improve the test method. Applying notch designs on upsetting test would accelerate the fracture initiation because of the stress concentration and strain concentration effects on the notch tip. In this research, the concentration effects are examined for different notch geometry parameters, including notch depth, notch tip radius, notch opening angle, and amount of notch. Through 3D finite element simulation, stress, strain and energy accumulation data are observed. The results showed energy accumulated most on the specimen that has high stress concentration effect. Finally, a notch design rule for high energy accumulation is recommended.

Original languageEnglish
Pages (from-to)309-316
Number of pages8
JournalJournal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Issue number4
Publication statusPublished - 2008 Aug 1

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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