👉 The term "crookback" is a term used in the field of engineering to describe the behavior of a structure or system that exhibits a tendency to change its shape and orientation over time. It is often used in the context of materials science, where it refers to the phenomenon of material deformation due to stress and strain. In general, crookbacks occur when a material undergoes a change in its physical properties such as volume, density, or stiffness, which can cause it to deform in unexpected