The Poynting effect, characterized by the emergence of normal stresses or strains during simple shear deformation, is a well-documented but often overlooked phenomenon in material testing and modeling. In classical linear elasticity, it is often assumed that simple shear deformations result solely in shear stresses. Experimental studies have, however, repeatedly shown that this ideal stress state is difficult to obtain in practice. This study revisits the Poynting effect through a simplified, two-dimensional linear elastic model that conceptualizes the buildup of forces along the diagonals of a sheared cuboid. The model is further employed to study the influence of sample geometry and material (represented through the ratio of bulk and Young’s modulus for linear elastic materials). The results indicate, that both factors play a significant role in the development of the Poynting effect in simple shear. With tall geometries and material characteristics representative of nearly incompressible materials exhibiting strong Poynting effect, while wide samples reduce the Poynting effect.      «

The Poynting effect, characterized by the emergence of normal stresses or strains during simple shear deformation, is a well-documented but often overlooked phenomenon in material testing and modeling. In classical linear elasticity, it is often assumed that simple shear deformations result solely in shear stresses. Experimental studies have, however, repeatedly shown that this ideal stress state is difficult to obtain in practice. This study revisits the Poynting effect through a simplified, tw...     »