Browsing NTNU Open by Author "Qin, Jisheng"
Now showing items 1-6 of 6
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A combined isotropic, kinematic and distortional hardening model for aluminum and steels under complex strain-path changes
Qin, Jisheng; Holmedal, Bjørn; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2018)In this work, a new model is proposed for predicting stress transients caused by strain path changes. The model is formulated in stress space, where a second order tensor, i.e., the microstructure stress deviator, is used ... -
Experimental characterization and modeling of aluminum alloy AA3103 for complex single and double strain-path changes
Qin, Jisheng; Holmedal, Bjørn; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2018)The stress-strain behavior of the aluminum alloy AA3103 subjected to single and double strain-path changes (SPCs) is studied experimentally. The experimental program includes compression-tension, tension-tension, rolling-tension ... -
Experimental investigation and modelling of strain-path changes in metals
Qin, Jisheng (Doctoral theses at NTNU;2017:287, Doctoral thesis, 2017) -
Modeling strain-path changes in aluminum and steel
Qin, Jisheng; Holmedal, Bjørn; Zhang, Kai; Hopperstad, Odd Sture (Journal article, 2017)The present paper evaluates two phenomenological plasticity models which account for the influence of strain-path change (SPC) on the stress-strain behavior. The HAH model (Barlat et al., 2014) is modified to capture SPC ... -
Modelling of strain-path transients in commercially pure aluminium
Qin, Jisheng; Holmedal, Bjørn; Hopperstad, Odd Sture (Journal article, 2017)In the current work, the recently proposed homogeneous anisotropic hardening (HAH) model, featuring a distorted yield surface, is applied to commercially pure aluminium. A dislocation-based hardening rule is incorporated ... -
Strain-Path Changes in Brass (Cu-20Zn)
Hågensen, Tonje Asklund (Master thesis, 2017)Metals are often exposed to multi-path loading in the forming process. Plastic deformed in more than one direction can have significant effects on microstructural evolution and mechanical behaviour. These mechanisms and ...