Small Punch Testing Method for the Development of Functionally Gradient Materials

Seiichi Okuda, Masahiro Saito, Toshiyuki Hashida, Hideaki Takahashi

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


This paper discusses the use of a small punch (SP) testing method to determine the elastic modulus and fracture strength of the material. Numerical analyses using the FEM were carried out to calibrate a SP specimen. Three loading modes were analysed to examine the punch tip effect on the deformation and fracture behaviour. Several ceramics and ceramics/metal composites were tested using the SP method, and their mechanical properties were determined using the results of FEM analyses. It is shown that the SP method provides a reliable means for measuring the elastic modulus. Furthermore, it is demonstrated that the fracture strength determined by the SP method shows a good correlation with the bending strength obtained from the three-point bend specimen which is commonly used for the determination of the fracture strength of ceramics.

Original languageEnglish
Pages (from-to)940-945
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Issue number536
Publication statusPublished - 1991


  • Ceramics
  • Composite Materials
  • Elastic Modulus
  • Finite-Element Method
  • Fracture Strength
  • Functionally Gradient Material
  • Material Testing
  • Small Punch Test


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