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Plastic spring

A spring tended beyond plasticity limit

This Finite Element Analysis shows the residual stresses and the residual plastic deformation in a steel spring tended beyond its yield strength and then unloaded. The simulation was carried out while taking into account the geometrical non-linearities (large deformations). The material features are those of steel 50CrV4 (EN 10277), modeled according to Von Mises plasticity with linear hardening.

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Mounting bracket

Mechanical analysis of an aluminium mounting bracket

This numerical simulation investigates the deformation and the equivalent stress in a metallic (aluminium) mounting bracket. The structure is subject to the combined action of torsion, point load and dead load.
The analysis shows an accumulation of the equivalent stress in the bottorm arms, which stays however well below the aluminium yield strength.
The FE mesh was generated through optimized automatic tetrahedralization of the geometrical model.

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Composite slab exposed to fire

Thermo-mechanical analysis of a steel-reinforced concrete slab at high-temperature

This numerical simulation shows a composite slab at high temperature exhibiting thermoplastic behaviour. The analysis is carried out by coupling thermal and mechanical FE analysis. The temperature field in the slab is computed by running a transient thermal analysis, where a thermal load according to the fire curve ISO 834 is applied. The heat strongly affects the mechanical properties of concrete and steel, reducing their elastic modulus and yield strength. As a result, the slab deflection increases with the temperature, as expected during fire exposure. The concrete behaviour is simulated with a Double Drucker-Prager constitutive model, which takes into account the material fracture energy. The steel beams are modeled according to Von Mises Yield criterion.

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Heat transfer analysis of a piston

A Piston subject to thermal load and convection

This transient thermal analysis shows the temperature distribution in an aluminium piston. At the top of the device a fixed temperature is applied, while the external surface is subject to convective heat flux. Observing a piston cross-section, it is easy to notice the influence of the geometry on the heat transfer.

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Buckling analysis of a steel beam

Detection of multiple instability modes in a 3D structure

This Finite Element Analysis shows the development of buckling in a HEA 500 steel beam. The buckling analysis takes into account geometric nonlinearity (large deformations) according to the formulation of Simo J.C. and Miehe C. The material nonlinearity of steel after yielding (elastoplasticity) is simulated by taking into account the Von Mises constitutive model with isotropic linear hardening. In particular, it is possible to detect several instability modes developing at different critical loads.

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