This "solid head" case is stronger and resists deformation of the primer pocket.

The hard jacket material, generally copper or brass, resists deformation and handles far higher pressures and temperatures than lead.

The collagen in connective tissue helps tissues resist deformation.

A material is also considered hard if it resists plastic deformation.

SMA has a high coarse aggregate content that interlocks to form a stone skeleton that resists permanent deformation.

Stiffness- The rigidity of an object - the extent to which it resists deformation in response to an applied force.

The basic principle, as with all common measures of hardness, is to observe the questioned material's ability to resist plastic deformation from a standard source.

In order to have stronger buildings and bridges, one must have a strong frame that can support high tensile or compressive load and resist plastic deformation.

This would tend to deform the body and generate internal stresses if the body resists deformation.

Modulus of rupture, the material's ability to resist deformation under load.