• Tomic, Radoljub
• Stefanovic, Zoran
• Milos, Marko
• Catic, Dobrivoje
• Sedmak, Aleksandar

Abstract

<jats:p>This paper presents numerical stress calculation in the stationarytemperature domain for a hybride structure with fiber composite (for example,based on the epoxy risen as matrice of prepreg) and metalic part (other partof structure or metalic mould), as different material according to their ownthermical behaviour. The thermal stress analysis is based on the finiteelement method. A sample problem involving such a composite plate and metalicpart of structure or mould at two different temperature levels, correspondingto curing process (co-curing) and operating temperatures respectively, iscalculated and discussed. The specifics of composite are emphasizedparticularly for thermal coefficients (especially shear coefficient isdifferent than zero, there are situations when some of coefficients could beless then zero). This composites as generalized orthotropic material arecompletelly different than isotropic material (for isotropic material shearcoefficient is always equal zero). It was pointed out also that thecalculation for the initial crack to appear in the lamellae (the most commonoccurrence of cracks in the matrix) can be set with a reserve of elasticityor without reserve.</jats:p>

Topics

• impedance spectroscopy
• crack
• composite
• isotropic
• resin
• curing
• lamellae