Simplifying FEA Models: Plane Stress and Plane Strain

Even with powerful modern computers, there is often a motivation to use simplifying techniques in structural finite element analysis (FEA).

This follow-up describes how two closely related methods can be used to take 2D slices through a complex structure at regions of interest. The resulting FEA models can give valuable insight into local stresses more rapidly and efficiently than a full 3D model. They won’t tell the whole story, but are valuable tools for the CAE engineer.

The two FEA methods are called plane stress and plane strain. Both use 2D planar elements that look like thin shell elements and are meshed using planar surface geometry.

Tony Abbey

Tony has been working with FEA for nearly 40 years, both in Industry and for FEA software providers in the UK and the US. Experience covers most of the analysis disciplines such as Dynamics, Nonlinear, Composites, Fatigue and Fracture, Optimization etc.

He provides FEA related training with NAFEMS and consultancy with his own company, FETraining. He has created and taught a wide range of FEA based training classes over the past 15 years. This is delivered live or via e-Learning. Tony has developed a reputation for providing the student with an experience that is full of insight gained from his extensive experience, but which also challenges and motivates.

Tony presents papers at NAFEMS and other conferences on a regular basis and has been involved with NAFEMS since its formation.

Tony contributes articles on FEA each month to Desktop Engineering and is a guest blogger on several sites.

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Tony Abbey

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