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	Determination of fracture parameters of general stress concentrators: I. Estimation of generalized stress intensity factor using Klusák, Jan A sharp notch is presented as a model for simulation of behaviour of generalized stress singular concentrators. Estimations of generalized stress intensity factor are shown using direct methods. Direct methods can be used for 2D and 3D structures. Advantage is the fact that these methods cooperate with standard finite element systems. Detailed record
	Criterion of minimal value of strain energy density in case of loading of V-notched body Klusák, Jan Presented paper deals with suggestion of stability criterion of V-notched solids under simple loading mode I or II or under combined loading mode I + II. The methods used to propose the stability criterion are based on an analogy of behaviour of cracked and notched bodies. The paper shows strain energy density distribution in the V-notch tip vicinity. Further, direction of assumed crack propagation is determined and an approach of criterion suggestion is presented in the paper. Detailed record
	Comparison of fracture behaviour of cracks and sharp notches Klusák, Jan ; Knésl, Zdeněk The theoretical background of linear elastic fracture mechanics of V-notches is presented. A crack is considered as a special case of the V-notch with zero open angle. Conditions for stability of a general singular stress concentrator are formulated. Based on results obtained a fracture behaviour of notches and cracks is compared. Detailed record
	Comparison of fracture behaviour of notches and cracks Klusák, Jan ; Knésl, Zdeněk The theoretical background of linear elastic fracture mechanics of V-notches is presented. A crack is considered as a special case of the V-notch with zero open angle. Conditions for stability of a general singular stress concentrator are formulated. Based on results obtained a fracture behaviour of notches and cracks is compared. Detailed record
	Study of the plastic zone shape and size in the V-notch tip vicinity Klusák, Jan The aim is to formulate the stability criterion of V-notch using the study of a plastic zone around the V-notch tip, i. e. determine the critical value of a generalized stress intensity factor HIC in dependence on fracture toughness KIC, yield strenght sigma0 and V-notch open angle 2.alpha. Detailed record
	A model for estimation of threshold values V-notch emanating fatigue cracks Klusák, Jan Threshold values for V-notch emanating fatigue cracks are expressed by means of threshold value for high cyclic fatigue crack propagation and the open angle of a V-notch. The conditions of V-notch cyclic stability are formulated. Detailed record
	Study of the plastic zone size in the V-notch tip vicinity Klusák, Jan A plastic zone at a sharp V-notch tip is studied in this paper. Relation for the plastic zone shape and size of a V-notch loaded by mode I in dependence on the open angle 2 alpha of a V-notch is derived. The conditions of V-notch stability are formulated. Detailed record
	Evaluation of the threshold values for fatigue crack propagation starting at the V-notch Klusák, Jan ; Knésl, Zdeněk Paper presents a simple method for evaluating the threshold value for V-notch-emanating fatigue crack. Corresponding calculations were performed by finite element method. Detailed record
	Analýza singularity napětí s bi-materiálovým vrubem Klusák, Jan ; Knésl, Zdeněk The article deals with analysis of a stress state in the case of constructions with a bi-material notch. The eigenvalues as well as the stress singularity exponents are determined and discussed for three specific geometries of a bi-material notch and for varying material combinations. The eigenvalues are presented in dependence on Dundurs` composite parameters in so called Dundurs` parallelograms. A numerical example of critical stress estimation is given at the end of the article Detailed record
	Study of the plastic zone shape and size in a bi-material vicinity Klusák, Jan Shape and size of a plastic zone in a vicinity of a bi-material notch are studied in the article. There are analytical relations shown for determination of the plastic zone and for evaluation of generalized stress intensity factors. Conditions of crack initiation from bi-material wedge are determined based on comparison of numerically determined stress intensity factor with its threshold value or comparing applied stress with critical stress. The results of the study contribute to better life-time evaluations of constructions containing a bi-material notch. Detailed record

See also: similar author names
6	Klusák, Jaroslav

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