The behaviour of instabilities in solids (metals, polymers, soils and rocks, concrete) is important when studying the durability of materials and serviceability of structures in their environment. Researchers in this subject area use not only numerical modelling techniques, but also experimental and hybrid analytical/modelling techniques. The powerful modern computational methods on the one hand and the major improvements in experimental techniques on the other have resulted in significant progress in recent years in the study of the mechanical behaviour of instabilities. This text is an...