Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 24, 2016 - November 26, 2016
Stress rupture and fatigue properties of carbon fibers are not well-evaluated, since matrix fracture is dominant to those properties of carbon fiber reinforced plastics (CFRP). The reason is stress concentration around the gripping portion of specimen. In this study, we focused on the adhesion of tab on unidirectional CFRP in order to examine test methodology. Effect of hardener for epoxy resin on the tab adhesive was investigated through measurement of acoustic emission (AE) which generated during static tensile test of unidirectional CFRP. In order to measurethe AE from tab bonding region, AE from central portion of specimen is removed by using AE sensor in midportion of specimen as guard sensor. Polymercaptan, modified polyamine, polythiol and N-(3-dimethylaminopropyl)-1,3-propylenediamine were used as hardener. Tensile strengths and elastic modulus were compared with different hardeners. Comparison of generation time and analysis of frequency of AE which generated in tab region were conducted to investigate adhesion. As a result, effect of hardener on mechanical properties and adhesion in static tensile test was little.
