Lifetime evaluation methodologies are gaining more focus and importance in the area of polymers especially when materials are subjected to anisotropy induced by fillers, additives etc. Applications using composite polymers are potentially subjected to harsh environments with cyclic loads, which can significantly reduce the lifetime of components. Failure due to fatigue and the subsequent lifetime evaluation has been particularly based on semi-empirical studies, due to the interaction of multiple factors. The proposed novel methodology in current work is based on 3D-optical experimental techniques together with digital image correlations (DIC), which establishes a generalized energy based fatigue model. The methodology is illustrated using a short fiber reinforced plastic (SFRP) on a tensile bar level and also on applications like water management, automotive component etc. The fatigue study includes different influential parameters like -ratio, pressure, temperature, fiber orientation and the presence of a weld line, which are seen as critical parameters for fatigue evaluation. The proposed model is later validated using numerical simulations, which will be discussed shortly in the current topic.

Advanced characterization technique to evaluate fatigue properties of composite polymers

256th National Meeting (2018)

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