The investigation of relationships between material’s structure, crystallography and mechanical properties for some construction materials on the base of samples with circular stress point

The investigation of relationships between material’s structure, crystallography and mechanical properties for some construction materials on the base of samples with circular stress point

 

The results of analytical study of relationship between strength and plastic properties of a series of structural materials are presented. For this purpose the behavior of different materials during the stretching process of flat tensile samples with a circular stress point was studied. It was found that the criterion of relative tensile strength A depends on the structure and type of material’s crystal lattice: materials, having a bulk-centered crystal lattice A < 1, and materials, having face-centered crystal lattice, A > 1. There was found the existence of a linear relationship (which depends on the structure and the type of material’s crystal lattice), between the criterion of relative tensile strength A, geometric parameters of the sample (R and b) with stress point, length of the zone of material’s plastic flow lp and extension strain δ.

 

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