Tensile fatigue performance of pultruded glass fiber reinforced polymer profiles

Environmental effects on fatigue behavior of adhesively-bonded pultruded structural joints

“…Basically, stiffness degradation results from crack propagation and degradation of laminate stiffness. However, previous experiments on similar adherends showed that degradation of laminate stiffness is almost insignificant at the low stress levels applied herein [14] and that, therefore, degradation primarily can be attributed to crack propagation in this case. Stiffness degradation was low, with less than 6-7% being observed for all the investigated cases.…”

Effect of rotational speed on the performance of unreinforced and glass fiber reinforced Nylon 6 spur gears

“…The mechanical properties of polymer and polymer composites are sensitive to strain rate and temperature [10,[17][18][19][20][21][22]. When the rotational speed of test gear is increased, the rate of loading on each gear tooth during service also increases [29].…”

“…The failure mode of both the material is influenced by the temperature rise and distribution. An increase in temperature during fatigue testing was observed in glass fiber reinforced polyester resin tensile fatigue specimens loaded at different frequencies [19]. Temperature, frequency and loading type were found to affect the fatigue performance of different polymers [20].…”

“…Gear tooth fatigue loading causes hysteresis heating of the tooth. The heat generation in conventional fatigue loading is studied by many investigators [17][18][19][20][21][22]. Rittel [17] investigated the heat generation during cyclic compressive loading on polycarbonate and polymethylmethacrylate specimens.…”

Influence of delamination on fatigue properties of a fibreglass composite

“…For instance, [3] studied unidirectional carbon fibre reinforced plastics and, considering the plot Log e maxLog N f , an infinite life region was evidenced, where damage mechanisms are either arrested or have too low rates of progression to cause failure in a large number of cycles. Also in [4], where a pultruded glass fibre reinforced composites was studied, a fatigue limit of approximately 25% of the ultimate tensile strength was observed at ten million cycles.…”