Force, Stress and Deformation

Abstract

In Chapter 2 we discussed the interrelation between the externally applied and internally induced interatomic forces, together with the resulting effect of crystal dislocation on the properties of a material element. Our present concern is twofold. Firstly, we need to restate some of the fundamental definitions, while at the same time providing a deeper insight into the physical significance of basic parameters, and, secondly, we have to develop our understanding of concepts of stress, strain and stress-strain relationships to a level at which we can apply them to more complex engineering problems. Basically, therefore, the following sections will represent a macroscopic view of the elements and tools of the analytical approach to a range of elasto-plastic problems backed, however, by our previously acquired knowledge of how the material is likely to behave on the microscopic level.