METHOD OF MEASURING CONTACT STRESSES IN GROUND Russian patent published in 2005 - IPC

FIELD: construction technology; graphical methods.

SUBSTANCE: combined profiles of stresses are built at the plane of contact of rigid dye with flat-deformed base taking elastic state of base combined with plastic one taken into account. Law of shift of bounds of these states at area of contact is determined depending on raise in external average pressure (p_av) while taking distribution of elastic contacts of stresses σ_zk ^e according to concave parabola law and distribution of contact stresses σ_z ⁿ of shift under smooth sole of stencil according to straight line rule. The straight line crosses concave parabola of elastic stresses at the bound of area of elastic and shift deformations. Parameters of carrying ability of base depending on internal friction angle φ, engagement c and volumetric weight γ are calculated for stencils of known shape, sizes, rigidity and degree of roughness of its sole. Contact tresses are determined from coordinates of profiles. Profiles after being built are represented as mirror reflection relatively axis of ordinates and profiles of elastic and shift contact stresses are got under surface of stencil.

EFFECT: solution of combined elastic-plastic contact problem.

3 dwg