High Strain Rate Properties of High Strength Steel Sheets

Akihiro Uenishi; Hiroshi Yoshida; Shigeru Yonemura; Shunji Hiwatashi; Satoshi Hirose; Noriyuki Suzuki

doi:10.20485/jsaeijae.2.4_109

Research Paper

High Strain Rate Properties of High Strength Steel Sheets

Akihiro Uenishi, Hiroshi Yoshida, Shigeru Yonemura, Shunji Hiwatashi, Satoshi Hirose, Noriyuki Suzuki

著者情報

キーワード: materials, iron and steel materials, high-strength steel, mechanical property, crashworthiness, high strain rate, thermally activated processes

ジャーナルオープンアクセス

2011 年 2 巻 4 号 p. 109-113

DOI https://doi.org/10.20485/jsaeijae.2.4_109

詳細

抄録

High strain rate properties of sheet steel largely depend on its strength level and strengthening mechanisms. The strain rate sensitivity of flow stress has a close relation with the hardness of a softer phase, which indicates superior strain rate sensitivity of multi-phase steels such as DP and TRIP steels. Simple-shear tests have revealed an increase of the flow stress with strain even for ultra high strength steel at large strains. Based on these experimental evidences and physical understandings, an appropriate constitutive model for crash simulation is proposed and discussed.

責任著者(Corresponding author)

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