Constitutive integration algorithms in metal warm forming. (March 2019)

• Record Type: Journal Article
• Authors: Zhao, D; Zhao, W.Y; Jin, T; Fang, H.Q; Wang, Z.H
• Is Part Of: IOP conference series. Volume 493(2019)
• Publication Date: 2019-03
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/493/1/012013
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: In this paper, two implicit integration algorithms are summarized in computational process, and an explicit numerical algorithm is presented for rate-dependent crystal plasticity in aluminium alloy warm forming, which is based on the forward Euler method. The plastic incompressibility and numerical accuracy are discussed in these algorithms. In this model, the plastic deformation gradient is chosen as controlling variable. The thermal deformation gradient representing the thermal history is introduced, and the plastic dissipation and the different temperature changing rates are considered in finite deformation computation. The expression of temperature dependent resolved stress is deduced form the thermodynamic framework. The mechanical behavior of Al polycrystalline in warm forming is computed and compared with different algorithms.