Fatigue damage accumulation in notched woven-ply thermoplastic and thermoset laminates at high-temperature: Influence of matrix ductility and fatigue life prediction

Prediction of the notched strength of woven-ply PolyPhenylene Sulfide thermoplastic composites at a constant high temperature by a physically-based model

“…The studied composite materials are carbon fabric reinforced laminates consisting of a semi-crystalline high-performance PPS supplied by the Ticona company [2][3] [18][19][20]. The woven-ply prepreg, supplied by SOFICAR, consists of 5-harness satin weave carbon fiber fabrics (T300 3K 5HS) whose volume fraction is 50%.…”

“…This ability is associated with less degree of stress relieving damage formation around the notch in unidirectional (UD) composites [18]. The effects of matrix ductility and toughness on notched /unnotched laminates have also been studied in carbon fibers woven-ply composites [17][18][19][20]. Besides, damage mechanisms and stresses redistribution near the hole significantly change depending on matrix nature as temperature increases [18][19][20][21].…”

“…The effects of matrix ductility and toughness on notched /unnotched laminates have also been studied in carbon fibers woven-ply composites [17][18][19][20]. Besides, damage mechanisms and stresses redistribution near the hole significantly change depending on matrix nature as temperature increases [18][19][20][21]. In addition to the contribution of the matrix toughness to the damage mechanisms in notched composite structures, the reinforcement architecture also significantly influences the laminates toughness, as it is illustrated by the specific impact behaviors and damage tolerance of woven-ply laminates [2][3].…”

Notch effect on strength and fatigue life of woven composite laminates

“…A great deal of research has been conducted to investigate the effect of notches on the mechanical performance of fibre reinforced composite laminates under static and fatigue loads. It has been reported that the strength and fatigue behavior of both the UD-based laminates and woven composite laminates are significantly affected by the notch location (single-edge notch [1] , double-edge notches [2] and central hole [3][4][5][6][7][8][9][10][11][12] ), notch shape (circular hole, elliptical hole and rectangular slot [3,4] ), and notch size [4][5][6][7] . Fatigue damage mechanisms of notched composites are different to those of un-notched composites.…”

“…In contrast to the wide spread of damage initiation sites along the length of un-notched composites, damage usually initiates at the notch and then split occurs and propagates tangent with hole in notched composites [8,9] . The damage growth rate and direction and the failure modes of laminated composite components are also dependent on many factors including fibre type [3] , matrix ductility [10] , stacking sequence [7,11] , and load type [12] .…”