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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 66
COMPUTATIONAL MECHANICS: TECHNIQUES AND DEVELOPMENTS
Edited by: B.H.V. Topping
Paper III.2

Thermoviscoplastic BEM Analysis of Stress Concentration Problems in Metallic Structures

C.P. Providakis

Department of Applied Science, Technical University of Crete, Chania, Greece

Full Bibliographic Reference for this paper
C.P. Providakis, "Thermoviscoplastic BEM Analysis of Stress Concentration Problems in Metallic Structures", in B.H.V. Topping, (Editor), "Computational Mechanics: Techniques and Developments", Civil-Comp Press, Edinburgh, UK, pp 39-44, 2000. doi:10.4203/ccp.66.3.2
Abstract
Various constitutive relations have recently been proposed to solve boundary value problems in creeping deformation of metallic plates. In this paper the direct formulation of the boundary element method is presented for the inelastic analysis of stress concentration problems arising in V-notched creeping plates at high temperatures. The deformation of the plate is simulated using a viscoplastic model developed recently. The model was formulated on the basis of a state variable theory for characterizing the time-dependent behaviour of metals and alloys under general loading conditions. The accuracy and efficiency of the method is demonstrated by obtaining stress distribution for a specimen with a single edge notch and subjected to pure bending. Simulation portrayed by the present formulation is further compared with other numerical solutions obtained for different bending stressing rates.

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