Comparative experimental testing of selected glass-polyester composites
Marian Klasztorny, Roman Romanowski, Paweł Gotowicki
Quarterly No. 1, 2011 pages 84-89
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abstract The study presents the results of comparative experimental testing of selected glass - polyester layered composites. The composites are symmetric, mixed (fabric - mat reinforcement), manufactured with the contact technology applied for shell segments of composite covers of engineering structures. The base composite is the laminate of a CSM300/4xWR600/CSM300 ply sequence used in the Klimzowiec sewage-treatment plant. Two research problems are considered: 1. the influence of the ply sequence in a glass - polyester composite on its load capacity, 2. the influence of the manufacturing technique of a glass - polyester composite on its load capacity. The comparative testing in problem 1 has been performed for the following laminates: the L-4F-2M laminate (matrix: Polimal 104 T polyester resin (inflammable), ply sequence: CSM300/ 4xWR600/CSM300), the L-2F-5M laminate (matrix: Polimal 104 T polyester resin, ply sequence: CSM300/WR600/ CSM450,300,450/WR600/CSM300). The comparative testing in problem 2 has been conducted for the follo-wing laminates: the L-T laminate (matrix: Polimal 104 T polyester resin, ply sequence: 3x(CSM450/WR600)/CSM450), the L-AWTP laminate (matrix: Polimal 104 AWTP polyester resin (with a styrene anti-evaporator additive), ply sequence: 3x(CSM450/WR600)/CSM450). The comparative testing of the load capacity has been limited to bending and interlaminar shear testing in problem 1 and to interlaminar shear testing in problem 2, performed according to the respective standards. In reference to problem 1, it has been pointed out that replacing the fabric core with a mat core considerably increases the strength to bending and the conventional strength to interlaminar shear. In reference to problem 2, it has been shown that adding a styrene anti-evaporator slightly decreases the conventional strength to interlaminar shear. Keywords:layered composite, glass-polyester composite, laminate’s core modification, styrene’s anti-evaporator influence, experimental testing