Plastic tension of strip with asymmetrical conditions in the area of grips

The article presents a mathematical model for solving a plane problem of stretching a plastic strip whose ends are clamped between two parallel rough planes of grips, supplemented by asymmetry of conditions on the spreading end zones. An upper estimate of the total compression force of the end zones of a plastically stretched strip by grips is found, upon reaching which, simultaneously with plastic stretching of the strip, plastic subsidence of its end parts by grips occurs. It is shown that with further deformation, the strip becomes thinner and breaks not in its middle stretched part, but near the inner boundary of contact with the grip.