Abstract
It is proposed to develop experimental and calculated approach to the study of the strength characteristics of elastoviscoplastic materials in a non-uniform strain-stress state. Integral characteristics (forces, displacements and displacement speed) of the deformation process of hat-shaped specimens in tension are determined by a direct impact method, and their strain – stress states are determined by numerical solution of the axisymmetric problem. The results of experimental and theoretical study of the deformation and failure of hat-shaped specimens in the presence of stress concentrators are obtained.
Highlights
Integral characteristics of the deformation process of hat-shaped specimens in tension are determined by a direct impact method, and their strain – stress states are determined by numerical solution of the axisymmetric problem
In Russia there is no practical realization of direct impact on the vertical gas-gun testing stand for construction of dynamic diagrams of deformation and strength characteristics of the study materials in tension
In order to study the possibilities of increasing the pulse width while maintaining the length of the striker numerical simulations of various forms of the impactor is done
Summary
In Russia there is no practical realization of direct impact on the vertical gas-gun testing stand for construction of dynamic diagrams of deformation and strength characteristics of the study materials in tension. Those who have previously been established, do not meet the accuracy requirements for use in the mathematical simulation of deformation and strength assessment of modern constructions. In order to study the possibilities of increasing the pulse width while maintaining the length of the striker numerical simulations of various forms of the impactor (cylindrical, with slotted opening and balls) is done. The application of one-dimensional model of the wave process for the recovery of the experimental parameters of loading and deformation of the hat-specimen are given in [5]
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