The non-uniform distribution of residual stresses can result in deformation, matrix cracking, and even delamination.
The non-uniform distribution of residual stresses can result in deformation, matrix cracking, and even delamination.

Reinforcement specialist Kordsa has carried out testing of process-induced residual stresses and their effects when processing thermoset polymer composites.

The project, run by Dr Fatih Ertugrul Öz, shows the effect of the different properties of constituents, the company said.

Residual stresses are the stresses that remain in a material or structure after the source of these stresses has been removed, Kordsa said. The non-uniform distribution of residual stresses can result in deformation, matrix cracking, and even delamination.

‘Process induced residual stresses in composite materials are unavoidable, but they should be taken into consideration in both the design and manufacturing process in order to meet the requirements of dimensional accuracy and good mechanical performance,’ the company said in a press release.

For more details on the project go here (pdf).

This story uses material from Kordsa, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier.