Lifetime and young's modulus changes of glass/phenolic and glass/polyester composites under fatigue

Analysis of fatigue and damage in glass-fibre-reinforced polypropylene composite materials

“…Spearing and Beaumont [9] analysed the residual stress and the split length obtained by radiographic techniques in carbon epoxy laminates. The loss of stiness during fatigue tests has been investigated as a damage criteria by Hahn and Kim [10] and Joseph and Perreux [11] in glass/epoxy, the authors [3,4] in glass/polypropylene and Echtermeyer et al [12] in glass/phenolic and glass/polyester composites. Czigany and Karger-Kocsis [13] quanti®ed fatigue damage by the size of the damage zones in textile fabric reinforced polypropylene composites using the acoustic emission technique.…”

Experimental–computational study towards heat generation in thick laminates under fatigue loading

“…(12)). In addition, the loss factor may vary per element due to ply orientation and damage evolution [14]. Hence for each element, a different loss factor might be used based on material and ply orientation.…”

“…The first increase is related with the transient state (heating up of the specimen). In the second part the temperature of the specimen is in equilibrium with its surroundings and the loss factor remains relatively stable for a large part of the fatigue life of the specimen [14] showing a minor increase. In the final phase, the loss factor increases due to a rapid increase of damage, and the temperature also increases from the steady state temperature until failure.…”

Fatigue behavior and life prediction of PI/SiO2nanocomposite films

“…It is known that the fatigue failure of polymers and matrix‐dominated polymeric composites is more complicated than that of the well‐studied metals due to the viscoelastic response and the large plastic deformation capability of materials. Earlier researches focused on the experiments and theoretical analyses of the fatigue properties of various polymers,1–3 and more recently, there were more research reports about polymeric‐matrix composites 4–7…”

“…Earlier researches focused on the experiments and theoretical analyses of the fatigue properties of various polymers, 1-3 and more recently, there were more research reports about polymeric-matrix composites. [4][5][6][7] In view of the fact that, using nanomaterials as fillers is becoming the state-of-the-art technology in materials science; numerous works have been done and many improved mechanical properties have been achieved with incorporations of nanofillers into polymeric matrices in the past years. [8][9][10][11][12] However, the studies until now are focused on quasi-static mechanical properties of this class of composite materials, e.g., how to improve their strength, stiffness, and toughness by adding small number of nanoinorganic fillers into polymeric matrices.…”