Advances in Direct Methods for Limit States of Structures and Materials

Konstantinos Spiliopoulos is Professor of Structural Mechanics at the Institute of Structural Analysis & Antiseismic Research of the School of Civil Engineering of the National Technical University of Athens (NTUA). He holds a Diploma in Civil Engineering from NTUA, an MSc from Imperial College in Concrete Structures and a PhD Degree from the Aeronautics Department of Imperial College. His research spans many different areas of Structural Mechanics, such as Inelasticity, Direct Methods for Limit States, Nonlinear Reinforced Concrete Analysis (NRCA), Earthquake Engineering, Graph theory, Mathematical Programming, Large Displacements and Strains, Large Rotations. He has published 35 papers in top rated international journals, 9 chapters in edited refereed books and has made 71contributions in international conferences. He is editor and co-editor of 3 books. Work on NRCA has been adopted by the ADINA software.Dieter Weichert graduated from RWTH-Aachen University in Mechanical Engineering, obtained hisDr.-degree and Habilitation from Ruhr-University Bochum. He held professional, academic and managing positions at Krupp-Brüninghaus GmbH (Germany), American University of Beirut, Université des Sciences et Technologies de Lille, Institut des Sciences Appliquées de Rouen andRWTH-Aachen University. He was active as consultant for private and public organisations until retirement in 2013. Fields of scientific interest: Solid Mechanics, Inelasticity, Failure of Materials and Structures, Composites, Biomechanics. He is author, co-author, editor, co-editor of more than 300 papers and 9 books.

• On Shakedown of shape memory alloys structures with functional fatigue - Application to nitinol stents.- A crystal plasticity-based lower bound direct method and its application in the fatigue strength prediction of the alouminum alloy material.- Limit analysis of 2D problems using a hybrid virtual element formulation.- Evaluation of the torsional strength of thin-walled RC beams in fire conditions.- A non-incremental numerical method for non-associated elastoplastic problems using the SBEN principle and the bipotential.- Collapse load prediction of human femur by Computed Tomography based limit analysis.- Direct Estimation of the Asymptotic Cyclic Stress for Structures under Creep and Plasticity conditions.- Shakedown Strength-Based Elastoplastic Topology Optimization and Its Application inMechanical Exoskeleton Design.- Application of direct methods to fatigue performance: crystal plasticity enhanced direct cyclic algorithm and classic shakedown theorem.- Limit analysis of metal beams and frames considering tangential stresses and warping.- Failure analysis and regularized fracture models.