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Finite element analysis and modelling helps predict performance, optimise designs and identify weak points, for efficient and reliable bonding. This method supports material exploration while reducing waste and enhancing overall product quality.
The finite element analysis (FEA) modelling is a widely used method for resolving mathematical and engineering problems and presents valuable insights for mechanical, thermodynamic and electromechanical challenges, and more. Since it is possible to test different types of material modelling in finite element analysis, it reduces the need for prototypes.
Viscoelastic finite element analysis employs a continuum-based linear material model, featuring a combination of elastic and viscous properties. This type of FEA model analysis allows for the consideration of both temperature and strain-rate dependencies in the mechanical response. It is specifically applied in scenarios involving small strain problems, offering a detailed understanding of material behaviour under conditions where the impact of deformation is limited.
Electroplastic finite element analysis is a continuum-based material model that incorporates both elastic and plastic characteristics, allowing for the representation of permanent deformation and non-linear behaviour in adhesives. This model accurately captures the response under various loading conditions such as tensile, compression and shear. Depending on the calibration, it can also account for strain rate and temperature effects. Pressure-sensitive elastoplastic models are frequently employed for polymers and adhesives, ensuring a comprehensive simulation of their behaviour in diverse mechanical scenarios.
Finite strain is a continuum-based non-linear material model that uses parallel networks of non-linear springs and dashpots to simulate the mechanical response of adhesives. The non-linear elastic behaviour of the springs is determined by a strain energy density function, often characterised by hyper-elasticity. This model is typically used to represent adhesives undergoing substantial deformations with non-linear viscous behaviour. It accommodates mechanical responses under tension, compression and shear. Depending on experimental inputs, temperature, strain rate, permanent set, and relaxation effects can be incorporated, offering a comprehensive representation of the adhesive's behaviour under varying conditions.
A cohesive zone FEA model is a fracture mechanics-based material model designed for simulating crack separation within a bond line. This model incorporates traction-separation laws for mode I, mode II and mode III fractures, with mixed mode behaviour calibrated using experimental data. Its application is particularly valuable in predicting cohesive failures within adhesive bonds.
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