A review on stress-driven nonlocal elasticity theory

Classical theories do not have the ability to study the behavior of materials at the nanoscale. Accordingly, new theories have been developed to predict the behavior of materials at the nanoscale. Some of these theories are nonlocal elasticity, strain gradient theory, couple stress theory and surface effect theory. In most articles, the authors use differential form of nonlocal elasticity theory. Recently, a number of authors have used the integral form of this theory and obtained interesting results. Therefore, in this research, articles related to the integral form of non-local theory have been examined for small-scale tubes, beams, shells, and plates.