Residual stresses in flat steel products

Purpose and goal

The aim in the pre-project is to clarify possibilities and limitations of today´s modelling and measurement techniques, and how to use them for an increased residual stress control. The purpose is additionally to examine some processes and process parameters´ effect on the residual stress state. The result will create a basis for further decisions to tackle residual stress related problems.

Expected results and effects

The experiments showed promising results. There are complete measurement systems at the market suitable for product control but still time requirements limit them to experimental and selected product tests. The models preformed in the project could catch the behavior of interest and give explanations. For the models it is primarily the material model and boundary conditions that may limit their accuracy. By an increased significance analysis the residual stresses can be overseen and the final product improved.

Planned approach and implementation

The procedure covers a number of experiments to produce residual stresses in different ways. For each experiment a FEM simulation is performed. By comparing the simulation with results from stress measurements and deformation measurements in the experiments the model and stress measurement technique can be validated.