TY - JOUR
T1 - Effect of fatigue damage on toughening of short-fiber-reinforced polymer composites
AU - Ha, J. C.
AU - Yokobori, A. T.
AU - Takeda, H.
N1 - Funding Information:
We appreciate the financial aids for the Japan Society for Promotion of Science of the RFTF program, 97R12101 and Professor Takeo Yokobori (Teikyo University) for useful discussion. Thanks also should be made to Idemitsu Petrochemical Co. for supply of the material used.
PY - 1999/5/1
Y1 - 1999/5/1
N2 - Fatigue fracture of fiber-reinforced polymer composites (FRP) occurs when microcracks are induced by debonding, pull-out and delamination at the interface between the matrix and fiber. This microcrack area increases with increase in fatigue cycles and a damage region is formed. In our previous paper, fatigue life of a short fiber-reinforced polymer composite consisting of glass fibers and polycarbonate matrix was found to be related not to the main crack growth behavior but to the progression behavior of the damage region. In this paper, using our proposed real time observational system, we performed detailed observations on the behavior of fatigue damage and clarified the mechanism of damage progression. Furthermore, mechanical considerations were performed by finite-element elastic-plastic stress analysis. The results mentioned above indicate that control of short fiber alignment makes it possible to release the stress concentration caused in the matrix, and disperse fatigue damage. This results in an enormous improvement in fracture toughness.
AB - Fatigue fracture of fiber-reinforced polymer composites (FRP) occurs when microcracks are induced by debonding, pull-out and delamination at the interface between the matrix and fiber. This microcrack area increases with increase in fatigue cycles and a damage region is formed. In our previous paper, fatigue life of a short fiber-reinforced polymer composite consisting of glass fibers and polycarbonate matrix was found to be related not to the main crack growth behavior but to the progression behavior of the damage region. In this paper, using our proposed real time observational system, we performed detailed observations on the behavior of fatigue damage and clarified the mechanism of damage progression. Furthermore, mechanical considerations were performed by finite-element elastic-plastic stress analysis. The results mentioned above indicate that control of short fiber alignment makes it possible to release the stress concentration caused in the matrix, and disperse fatigue damage. This results in an enormous improvement in fracture toughness.
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U2 - 10.1023/A:1004567911562
DO - 10.1023/A:1004567911562
M3 - Article
AN - SCOPUS:0033133171
VL - 34
SP - 2103
EP - 2111
JO - Journal of Materials Science
JF - Journal of Materials Science
SN - 0022-2461
IS - 9
ER -