Durability and Reliability Estimation of Flax Fiber Reinforced Composites Using Tweedie Exponential Dispersion Degradation Process

Flax fiber reinforced composites are demonstrating promising outcomes which make them potential candidates to replace synthetic in various industrial applications. However, there is limited information regarding their long-term performance, and it usually acknowledged that natural fibers less resistant than counterparts. In this context, crucial study durability before considering use for structural rehabilitation strengthening construction. This research aims predict the performance of flax polymer (FFRP) with a biobased epoxy matrix. The test program consists exposing FFRP laminates strengthened concrete slabs different accelerated ageing conditions over total period two years. present study, not single stress variable but combinations coupling environmental variables, temperature (T) relative humidity (RH), considered, thereby distinguishing from most works reported literature. Then, series mechanical destructive tests performed periodically on aged samples evaluate property evolutions time. collected experimental data analyzed develop evolution model service lifetime new composite. For that, Tweedie exponential dispersion (TED) process model, takes some famous stochastic processes (Wiener process, Gamma inverse Gaussian process) as special cases, investigated. TED modeling, particularly interesting cases complicated degradation mechanisms, written here and, finally, reliability analysis based determined carried out order update FRP design equations provided by international codes specific case FFRP.