"Výpočtová mechanika 2006" - Search Results - Digital Repository

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	INFLUENCE OF MATERIAL PARAMETERS ON POLZNOM USED FOR MODIFICATION PARIS LAW Seitl, Stanislav In this paper sensitivity analysis of the effect of material properties (particularly a yield stress and hardening exponent) on the polynomial function used at modification of the Paris-Erdogan law was performed. The modification, which is based on the two-parameter fracture mechanics, describes fatigue crack propagation using a size of the plastic zone. The stress field around a crack tip is described by two parameters – stress intensity factor K and T-stress. Dependency of the plastic zone size and the parameters K, T is then formulated by using the polynomial function, which is found out in the contribution. The finite element method together with the method of modified boundary layer for the numerical simulations was used. The results should lead to safer transmission of the data from laboratory specimens to real structures and their components. Detailed record
	Analytical formulation of dispersion curves in a plate with cubic anisotropy for arbitrary direction of wave propagation Červená, Olga ; Hora, Petr This paper deals with analytical formulation of dispersion curves for stress waves in a free (001)-cut cubic plate. The direction of wave propagation is arbitrary and it is defined by the angle .FI., the angle between the [100] axis and the wave vector. The dispersion curves for Cu are presented. These results are compared to the uncoupled Mindlin modes. Detailed record
	To influence of damping on impact effects in gear mesh Hortel, Milan ; Škuderová, Alena The motion equations of nonlinear parametric system of kinematic pair with elastic supported cog wheels were assembled on the basis of analytical Lagrange’s theory of mechanics, principle of virtual work, d’Alembert’s principle of conversion of kinetics problem onto statics and Lagrange’s release principle and analytical solved by means of equivalent nonlinear integrodifferential equations with solved kernels in the form of split Green’s resolvent. The influence of linear and nonlinear damping in the several phasis of gear engagement onto impact effects in gear mesh is solved in the contribution by means of numerical simulation in MATLAB/Simulink. Detailed record

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