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Information × Registration Number 0200U003963, 0197U018136 , R & D reports Title Development of the methods for assessment of crack growth resistance and life time of structure materials under dynamic and static loading popup.stage_title Head Andrejkiv Oleksandr Yevgenovych, Registration Date 20-12-2000 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 On basis of energy criterion of fatigue fracture of materials is formulated a system of kinetic equations for growth of fatigue cracks in heterogeneous materials taking into account previous plastic deforming of material. On basis of ?с-model generalized to the cyclic loading is elaborated the method of analysis of elastic plastic situation at the fatigue crack tip accounting reverse plastic yielding of material in prefracture zone and crack closure effects. An unique methods for investigation of cyclic crack growth resistance of materials under mixed mode stress state is elaborated. It is based on simultaneous tension and twisting of cylindrical hollow specimen with two notches. The calculation-experimental methods for determining dynamic crack growth resistance is elaborated and approved. It is based on problem solutions results of dynamic tension of cylindrical specimen with circular crack Product Description popup.authors popup.nrat_date 2020-04-03 Close