E. N. KHRUSTALEV(S METHOD OF PRODUCING UNIFORM CONTACT STRESS AT INTERACTION OF MATERIAL MEDIA Russian patent published in 2016 - IPC G01N3/12 

FIELD: physics.

SUBSTANCE: invention relates to the possibility of achieving uniform stress-strain state in the zone of contact of two material media. Substance of invention consists in that is the contact surface of more strong material medium convex hemispherical shape with radii interaction $$R_{wed.sf}=\mathrm{0,5}\sqrt{b^2+l^2}/\sin {\phi }_{cl}^{о}$$ - for a rectangular area of contact, $$R_{wed.sf}=\mathrm{0,5}d/\sin {\phi }_{cl}^{о}$$ - for round contact area, $$R_n=\mathrm{0,5}b/\sin {\phi }_{cl}^{о}$$ - for semi-cylindrical shape contact width b, where $${\phi }_{cl}^{о}$$ - internal friction angle medium with a deformed or intact, weaker strength.

EFFECT: enabling determination of geometrical parameters of contacting material media with uniform distribution of stresses between them.

1 cl, 3 dwg