Experimental Study on Viscoplastic Behavior of SUS 304 Stainless Steel After Axial Cyclic Preloading

• KANEKO Kenji

• KREMPL Erhard

抄録

Structural materials used in such products as airplanes and pressure vessels in nuclear reactors are usually subjected to cyclic loadings and to abrupt accidental overloadings. An accurate estimate of strength properties of cyclic prestrained materials under accidental overloading can be very useful for the purposes of design safety and cost reduction. In this report, viscoplastic behavior of Type 304 stainless steel after axial cyclic preloading of various types was investigated experimentally at room temperature. The difference between flow stress levels depending on strain rate decreases considerably after cyclic preloading. However, the relaxation stress drop increases rather than decreasing with an increase of flow stress even after cyclic preloading. No consistency in viscoplastic behavior, which is shown by the customary viscoplastic theories, can be found. Plastic modulus Ep depends on the flow stress level for the case of comparatively small cyclic preloading. Ep becomes much smaller and constant after strong cyclic preloading. Thus much larger plastic strain may occur when an abrupt overload is applied. A very strong linear relationship between Ep and plastic work per cycle is found.

収録刊行物

• JSME international journal. Ser. 1, Solid mechanics, strength of materials

  JSME international journal. Ser. 1, Solid mechanics, strength of materials 33 (3), 356-361, 1990

  一般社団法人 日本機械学会

キーワード

• Viscoplasticity
• Stress Relaxation
• Tensile Properties
• SUS304 Stainless Steel
• Cyclic Preloading
• Plastic Modulus
• Stress-strain Relations

詳細情報

• CRID: 1390001205431848192
• NII論文ID: 110002347638
• NII書誌ID: AA10680585
• DOI: 10.1299/jsmea1988.33.3_356
• ISSN: 09148809
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1988/33/3/33_3_356/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可