Plasticity models describing the Bauschinger effect and yield-point phenomena.

• Autorzy: Yoshida F. , Uemori T. , Sun H.B. , Itoh M.

Warianty tytułu

PL

Modele plastyczności opisujące efekt Bauschingera i zjawiska granicy plastyczności.

• Konferencja: XVIth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies AMT'2001, Gdańsk-Jurata, 16-20 September 2001
• Języki publikacji: EN

Abstrakty

EN

This paper presents a plasticity model (rate-independent model) which has a high capability of describing the deformation behavior at large-strain and also the stress-strain responses at small-scale re-yielding after large prestrain. A new equation of backstress evolution is proposed for an accurate simulation of the transient Bauschinger effect. An original idea of a non-isotropic-hardening surface defined in the stress space is presented for the description of the workhardening stagnation appearing under reverse deformation. Furthermore, in order to describe the yield-point phenomena characterized by a sharp yield point and the subsequent abrupt yield drop, this model is extended to a model of viscoplasticity (rate-dependent model) on the premise that the phenomena of sharp yield point and the subsequent abrupt yield drop result from rapid dislocation multiplication and the stress-dependence of dislocation velocity. Based on this viscoplasticity model, the description of strain-ageing , i.e., the Cottrell locking and the precipitation hardening, is discussed.

Słowa kluczowe

EN

plasticity model; Bauschinger effect; yield-point phenomena; stress; model; ageing; hardening

PL

model plastyczności; efekt Bauschingera; zjawisko granicy plastyczności; granica plastyczności; naprężenie; model; starzenie; utwardzanie

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2001
• Tom: R. XXII, nr 5
• Strony: 974--980
• Opis fizyczny: Bibliogr. 28 poz., tab., rys.

Twórcy

autor

Yoshida F.

• Hiroshima University, Higashi-Hiroshima, Japan

autor

Uemori T.

• Hiroshima University

autor

Sun H.B.

• Hiroshima University

autor

Itoh M.

• Chiba University, Chiba, Japan

• Hiroshima University, Higashi-Hiroshima, Japan

Bibliografia

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