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ADVANCES IN COMPUTATIONAL METHODS FOR SIMULATION
Edited by: B.H.V. Topping
A 3-D Numerical Study of the T-Stub Problem Taking into Account the Interfacial Unilateral Contact Effects
H.I. Sakellariadou, C.D. Bisbos, K. Thomopoulos and P.D. Panagiotopoulos
Institute of Steel Structures, Aristotle University, Thessaloniki, Greece
H.I. Sakellariadou, C.D. Bisbos, K. Thomopoulos, P.D. Panagiotopoulos, "A 3-D Numerical Study of the T-Stub Problem Taking into Account the Interfacial Unilateral Contact Effects", in B.H.V. Topping, (Editor), "Advances in Computational Methods for Simulation", Civil-Comp Press, Edinburgh, UK, pp 115-124, 1996. doi:10.4203/ccp.42.2.4
The present paper aims to contribute to the research that concerns the clarification of the complex 3-D stress state, which develops in a T-stub under axial loading. The stub is the simplest physical model problem for structural steel connections containing nonnegligible unilateral contact phenomena.
A numerical technique, based on previous work, is presented to numerically simulate the behaviour of the model using a Total Lagrangian FEM formulation coupled with constrained optimization techniques.
Various numerical results are depicted, concerning: i) the contact force distribution at the profile flange and at the bolt, ii) the von Mises stress, showing clearly the 3-D character of the stress state and iii) the equivalent plastic strain, indicating the plastification mechanisms under the influence of the unilateral contact conditions.
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