Determining the Mechanical Characteristics of Microspheres in Compression

Abstract

The methodology to determine the compressive strength of microspheres is improved. It is validated by buoyancy measurements. It is demonstrated that the tangent circle method allows determining the point of maximum curvature of the stress–strain curve of microspheres. The optimal ratio of the height of microspheres to the diameter of the die mold (H/D) is determined. Curves of variation of the elastic modulus and absorbed strain energy with the maximum cyclic stress are plotted.