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Effects of Geometry and Dimension of Specimen and Rig on Small Punch Creep Property

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Abstract

The purpose of this study was to examine the effects of the geometries and dimensions of the rig and specimen of a small punch (SP) test on the determined creep property. The SP creep property of a specimen was evaluated using finite element analysis by varying the specimen thickness and diameter, diameter of the spherical and hemispherical indentation punches, inner diameter of the lower die, and dimensions of the chamfer of the lower die. We observed that the rupture time decreased with decreasing specimen thickness and punch diameter and with increasing chamfer size and inner diameter of the lower die. Under similar analytical conditions of static average equivalent stress in steady state, the SP creep curves reasonably agreed even in the case where the specimens or rigs have different geometries, which implied the possibility of direct comparison of the test results obtained from specimens and rigs with different dimensions and geometries.

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Author notes

  1. T. Nakata

    Present address: Division of Industrial Innovation Sciences, Graduate School of Natural Science & Technology, Okayama University, Okayama, 700-8530, Japan

Authors and Affiliations

  1. Division of Chemical and Materials Engineering, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido, 050-8585, Japan

    T. Nakata

  2. Division of Mechanical Engineering, Graduate School of Science and Engineering, Kagoshima University, Kagoshima, 890-0065, Japan

    S. Komazaki

  3. Materials Science Research Unit, College of Design and Manufacturing Technology, Muroran Institute of Technology, Muroran, 050-8585, Japan

    Y. Kohno

  4. Structural Materials Development Group, Department of Fusion Reactor Materials, Research Rokkasho Fusion Institute, Fusion Energy Research and Development Directorate, National Institutes for Quantum and Radiological Science and Technology, Rokkasho, 039-3212, Japan

    H. Tanigawa

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  1. T. Nakata
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  2. S. Komazaki
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  3. Y. Kohno
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  4. H. Tanigawa
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Correspondence to T. Nakata.

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Nakata, T., Komazaki, S., Kohno, Y. et al. Effects of Geometry and Dimension of Specimen and Rig on Small Punch Creep Property. Exp Mech 57, 487–494 (2017). https://doi.org/10.1007/s11340-016-0250-2

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  • DOI: https://doi.org/10.1007/s11340-016-0250-2

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