Applied Mechanics and Materials Vol. 611

Abstract: The main goal of this work is to find the optimum way for numerical simulation of bonded joints using finite element analysis. The most important requirements for the model are simplicity, wide utilization (for all types of bonded joints) and efficiency. The final paragraph includes the way of determination of damage and cohesive parameters of bonded joints using cohesive surface based contact. The results of this research should be suitable for modelling of the general type of bonded joints.

Abstract: This paper is focused on the development of a finite element model describing the behaviour of sandwich structure with composite skins and low density foam core in case of low-velocity transverse impact load. The material properties of foam core and composite skins were determined using tensile tests. The non-linear elastic behaviour of composite skins was implemented into the commercial finite elements software using material subroutine. The identification process combining finite element simulations and mathematical optimization method was used for the determination of material parameters of the composite skins. The foam core was modelled using Abaqus Low-density Foam material model considering the non-linear behaviour in case of tension.

Abstract: The paper presents investigations of the optimal geometric parameters for the sandwich rectangular pipe. The analyzed parallelepiped shell is loaded with uniform internal pressure. The objective function is the ratio of the shell structure mass to mass of the medium contained in the shell. The minimum of the objective function is searched. The optimization constraints are a geometric conditions relating to the dimensions of the shell, and strength requirements. The solution was obtained and the optimum geometrical parameters are presented.

Abstract: The subject of creation of simulation and mathematical models is nowadays more and more current and its application is in almost every aspect of life. The article deals with compiling a mathematical model of a pivoting arm using Lagrange equations of the second kind. Subsequently, the model will be created in the simulation program Matlab/Simulink. The simulation model will as well be assembled in the program Adams. The results of these simulations will be compared in the conclusion. This article presents a procedure for resolving a mechanical system from the beginning, from creation of a mathematical model through creation of a simulation model up to evaluation of the simulation results. This paper presents a procedure for resolving mechanical system from the beginning. Thus, it is done by creating a mathematical model through the creation of a simulation model to evaluate the results of the simulation. According to these simulations will produce a working model of the manipulator, which could be used for teaching purposes.

Abstract: We can effectively use experimental and simulation approaches for pipe conveyors research. The paper describes a simulation of experimental measurement which was realized by special test device for pipe conveyors research. The simulation model was created by the help of program Abaqus.

Abstract: In the paper, the influence of material model selection on the behaviour of Finite Element model of a compressed thin-walled channel is studied. Results of three material models of channels of two different lengths and two types of geometric imperfections are compared and discussed.

Abstract: Gear teeth are deformed due to the load. Recently, at ever faster evolving computer technology and the available literature, we can encounter modern numerical methods, such as finite element method (FEM), which can serve as methods for the determination of deflection gearing. This paper deals with stiffness and deformation of teeth of spur gears solution by finite element method.

Abstract: The aim of the paper is the application of MSC Adams/View for kinematic analysis of motion of a mass point in a curve with consideration and without consideration of resistive forces. The first section describes the program Adams and its modules Adams/View, work with this module and its basic operation. In the following section there is solved an inclined throw of a mass point with and without resistance using numerical methods. Subsequently, this work deals with assembling of the models in Adams/View, running the simulations, plotting the trajectory, which shows the distance travelled and with creation of a table of parameters for easier and especially quicker change of model properties. Finally, the work presents the results with graphic display of parameters such as speed, distance and acceleration.

Abstract: The paper presents concept and application of mathematical and simulation model of variable-speed drives (hereafter VSD or VSDs). The models were/are used in rolling mills engineering, commissioning and maintenance. The VSDs are the main actuators there. In order to reach optimal performance in terms of material tolerances, wear and tear, and reliability it is necessary to have good VSD control which meets not only technology targets but also properties of the VSD mechanical train (set of motor rotors, shafts, gear boxes, couplings, clutches, spindles, working and backup rolls, etc.). Only the optimal VSD control and appropriate operation and maintenance can ensure trouble-free operation and long lifetime of the VSDs. We have been dealing with the VSDs models since 1990. Since then we have used the models in many practical applications. Currently, we concentrate mainly on an optimal and advanced interstand section control. Apart from various PID control strategies, also Fuzzy control has been tested and analyzed. The paper mentions some of our experiences we have achieved in this area.

Abstract: In this paper concepts and behaviour of plasticity, hyperelasticity and hyperplasticity are explained and clarified. Description of hardening models and hyperplastic models is provided too. The theoretical overview presented in this paper covers the crucial prerequisite for creating and applying hyperplastic material models into practice, either for simulation purposes or for real world application.