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Inelasticity of the dissipative component is controlled by a yield function with different functional forms for the hardening variable during deformation loading and unloading.
As for anisotropic yielding, the non-quadratic anisotropic yield function, Yld2000-2d, was utilized for base material zones, while isotropy was assumed for weld zones for simplicity.
Consequently, this paper suggests and discusses a new yield function, which allows for asymmetric yielding.
Initial yielding is described using a recently developed analytical yield function that accounts for both anisotropy and strength differential effects.
"It acts to yield function".
A yield function is required to derive CPB strength.
A planar anisotropic yield function proposed by Barlat is used.
This study proposes an asymmetrical fourth-order polynomial yield function.
A procedure is suggested to obtain an approximate but convex Gotoh's yield function in case an as-calibrated Gotoh's yield function is found to be non-convex.
Although in this paper, the Plunkett et al. (2008) yield function is used, the proposed methodology is general and can be applied to any yield function.
Determined constitutive data are two elastic parameters and a yield function.
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