変態塑性現象のメカニズムと温度・応力変動下での弾塑性挙動　‐統合型変態・熱塑性理論の応用‐

DOI Web Site 被引用文献3件 参考文献8件

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タイトル別名
  • On Phenomenological Mechanism of Transformation Plasticity and Inelastic Behavior of a Steel Subjected to Varying Temperature and Stress -Application of Unified Transformation-Thermoplasticity Theory
  • 変態塑性現象のメカニズムと温度・応力変動下での弾塑性挙動--統合型変態・熱塑性理論の応用
  • ヘンタイ ソセイ ゲンショウ ノ メカニズム ト オンド オウリョク ヘンドウカ デノ ダンソセイ キョドウ トウゴウガタ ヘンタイ ネツ ソセイ リロン ノ オウヨウ

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抄録

Based on the well known fact for the transformation plasticity that the plastic deformation takes placee in mother phase due to the progressing new phase when applying small stress during transformation, an simple phenomenological mechanism on pearlite and martensite transformation from austenite is discussed by considering the difference in thermal expansion coefficients : Numerical analysis of both phases connected each other shows that stress in mother phase increases to the yield level under small applied stress even lower than the yield stress, which gives the background of theory of unified transformation-thermoplastic constitutive law proposed by the present author. As an application of the theory, thermoplastic behavior for a fire resistant steel is simulated for complicated variation of stress and temperature, which shows fairly good agreement with experimental data. This may motivate to provide key knowledge for the decrease in strength of steel structure due to fire sometimes occurring after earthquake.

収録刊行物

  • 材料

    材料 57 (3), 225-230, 2008

    公益社団法人 日本材料学会

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