Memory of rotation in residual stress of paste

TL;DR

This paper numerically studies how residual stresses in paste after horizontal rotation serve as a memory of the rotation, revealing directional stress changes and their relation to plastic deformation.

Contribution

It introduces an elasto-plastic model to analyze residual stress memory in paste, providing a theoretical explanation for stress distribution changes after rotation.

Findings

Residual stress increases circumferentially after rotation

Radial residual stress decreases post-rotation

Plastic deformation explains stress distribution changes

Abstract

We numerically investigate the stress distribution in pastes after horizontal rotation by using an elasto-plastic model. Residual stress remains as a memory of rotation. The stress in the circumferential direction increases after the rotation, whereas that in the radial direction decreases. The residual stress is analytically related to the plastic deformation induced by the rotation. Based on the time evolution of plastic deformation, we theoretically describe the mechanism of the changes in the stress distribution.