CMM-2011 -Computer Methods in Mechanics Using of Smoothed Particle Hydrodynamics (SPH) method for concrete application

Abstract The paper deals with the Smoothed Particle Hydrodynamics (SPH) method used for the analyses of quasi-static and dynamic problems of concrete structures. The influence of the loading velocity, the particle density, the smoothing length and renormalization are discussed

CISM Courses and Lectures

The book describes behavior of materials (ductile, brittle and composites) under impact loadings and high strain rates. The three aspects: experimental, theoretical and numerical are in the focus of interest. Hopkinson bars are mainly used as experimental devices to describe dynamic behavior of materials. The precise description of experimental techniques and interpretation of wave interaction are carefully discussed. Theoretical background refers to rate dependent thermoviscoplastic formulation. This includes the discussion of well posedness of initial boundary value problems and the solution of the system of governing equations using numerical methods. Explicit time integration is used in computations to solve dynamic problems. In addition, many applications in aeronautic and automotive industries are exposed

Close Range Explosive Loading on Steel Column in the Framework of Anisotropic Viscoplasticity

The research was based on data obtained from experimental studies and aims in the challenge of mapping these results by a mathematical (phenomenological) model. The field experiments were performed on an H-section steel column supported by a reinforced concrete foundation and subjected to a close-in explosion. Numerical studies were carried out using Abaqus/Explicit code. The user subroutine VUMAT for metallic obstacle was also implemented, together with a coupled Eulerian–Lagrangian approach. The steel column failure recorded during real field tests versus computational results was examined and compared. It was crucial that, from the computational point of view, the obstacle reflected the generalized thermo-elasto-viscoplastic (GTEV) behavior of Perzyna’s type, including an anisotropic measure of damage

ANALYSIS OF THE PROCESS OF WOOD PLASTICIZATION BY HOT ROLLING

In this research, a mathematical model is derived to enable analytical determination of effective ultimate forces in the process of plasticization of the surface layer of wood. The experimentally determined thermo-mechanical properties of the material subjected to the process of plasticization are used in defining the structure of the model. The analysis of plastic strain in the layer in consideration is based on a generalised model of an ideally rigid-plastic medium, including certain modifications. Considering the anisotropic properties of wood, the Azzi-Tsai-Hill (ATH) strength criterion is applied which takes into account variation in the response of the loaded material depending on the direction. The article presents also results of FEM analysis of the same process of hot rolling of wood

Special issue of the 10th German–Greek–Polish symposium on “Recent Advances in Mechanics” 2019

Summarization: The German–Greek–Polish symposium was initiated by our former colleagues Oskar Mahrenholtz (Germany), Anthony Kounadis (Greece), and Roman Bogacz (Poland). Every 3 years about 15 participants from each nation meet for a scientific exchange. This special issue contains a selection of contributions of the participants, which have changed from the original meetings in the nineties mainly focusing problems in dynamics toward aspects in Solid Mechanics. These meetings are of great importance especially against the background of current developments in the world, as they promote intercultural discourse in addition to the actual content of modeling problems of mechanics.Presented on