The discussion centers on the definition of the Poynting effect in the context of simple shear deformation, specifically regarding normal and shear stress components. Participants explore whether non-zero normal stresses in the presence of shear can be classified as the Poynting effect. The conversation highlights that the stress tensor's behavior is non-linear during large deformations, leading to complex interactions between shear and normal stresses. There is a debate about the importance of precise terminology versus the existence of the effect itself, with an acknowledgment that clarity is essential for comparing findings in the literature. Ultimately, the focus remains on understanding the implications of shear on stress states rather than strictly defining the Poynting effect.
