On nonisothermal elastoplastic analysis of shell-components employing realistic hardening responses (CROSBI ID 86229)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Tonković, Zdenko ; Sorić, Jurica ; Krätzig, Wilfried, B.
engleski
On nonisothermal elastoplastic analysis of shell-components employing realistic hardening responses
In the present paper, efficient numerical algorithms for elastoplastic analysis of shell-like structural components will be proposed employing nonisothermal, realistic, highly nonlinear hardening responses. The closest point projection integration algorithm is presented using a Reissner-Mindlin type kinematic shell model, completely formulated in tensor notation. Further, a consistent elastoplastic tangent modulus is derived, which ensures quadratic convergence rates in the global iteration approach. The integration algorithm has been implemented into a layered assumed strain isoparametric finite element, which also enables geometrical nonlinearities including finite rotations. The nonisothermal elastoplastic response behaviour of a circular cylindrical shell and a box column under axial compression is analysed. Under the assumption of an adiabatic process, the increase in temperature is computed during elastoplastic deformation. Robustness and numerical stability of the proposed algorithms are demonstrated.
Shell structures; Finite element analysis; Elastoplasticity; Nonisothermal hardening responses; Integration algorithm; Tensor formulation
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Podaci o izdanju
38 (28-29)
2001.
5019-5039-x
objavljeno
0020-7683
1879-2146