Modeling of Short Fiber Reinforced Polymer Composites Subjected to Multi‐block Loading

Short Fiber Reinforced Composite (SFRC) structures exhibit multiple microstructures (due to material flow during the process). They are generally subjected variable amplitude loadings. In this context, a robust model is needed predict fatigue life as function of microstructure. paper, we propose predictive micromechanical damage-based allowing prediction in case SFRC submitted cyclic loading. An experimental study was firstly performed on Sheet Molding Compound (SMC) composite involving different microstructure configurations. Specimens were stress-controlled block The influence order sequences evaluated through Low-High (L-H) and High-Low (H-L) schemes. Damage accumulation computed at local scale describe evolution fiber-matrix interface damage until failure. A failure criterion based critical state allowed predicting good correlation found between numerical results. Once approach validated, it has been used useful loading schemes emphasize role sequence parameters order.