ESAComp introduces “through-the-width” debonding/delamination analysis

Harri Katajisto

esacomp debondingDelamination is a recognized, major failure mechanisms for composites. The separation of the internal layers within a composite, caused by high through-the-thickness stresses, can arise due to manufacturing defects or from impacts occurring during assembly or whilst in-service. Delamination can reduce considerably the load-carrying capability of the component and may result in significant structural damage or failure, particularly when loaded in compression.

Coming soon in ESAComp 4.7, the new delamination module utilizes various technologies to predict the onset of damage propagation. A geometrically nonlinear analysis approach provides the means to predict the realistic load-deformation-path including various buckling modes.

By utilizing Strain Energy Release Rate (SERR) data, the onset of delamination is predicted using the relevant delamination criteria at the delamination front. The required material input data comprises the fracture toughness, with respect to the three modes, along with the interaction term which is related to the mode mix. For some of the material systems, the ESAComp Database now includes fracture toughness data.

Harri Katajisto

About Harri Katajisto

Harri holds a Master’s Degree in Mechanical Engineering from the Helsinki University of Technology with a focus on lightweight structures. He has been the member of the ESAComp team since 2000 and joined Altair in 2017. He considers himself as a middleman working closely with industry, research and software development aiming to provide practical software solutions for the Composites Industry together with the Altair Composite Technology Team.