Stress and Strain Measurements in Solid Materials

In the article a design basis is given for stress cells (normal stress and shear stress) and strain cells.

The design basis covers cells embedded in a loaded matrix or in a matrix with a stress-free strain field (for example, shrinkage). The results are tabulated in the paper.

A stress cell has been designed that is intended to have no transverse sensitivity and to read correctly even in the case of high strains in the surrounding medium.

Calibration tests have resulted in good or reasonably good correspondence between calculated and measured properties.

The design basis is also expected to be useful for assessing the effect on a cell's reading of a local change in the matrix properties around the cell that may arise from the mounting procedure.