Influence of locational states of submicron fibers added into matrix on mechanical properties of plain-woven Carbon Fiber Composite

• Autorzy: Soichiro Kumamoto , Kazuya Okubo , Toru Fujii
• Języki publikacji: EN

Abstrakty

EN

The aim of this study was to show the influence of locational states of submicron fibers added into epoxy matrix on mechanical properties of modified plane-woven carbon fiber reinforced plastic (CFRP). To change the locational states of submicron fibers, two kinds of fabrication processes were applied in preparing specimen by hand lay-up method. Submicron fibers were simply added into epoxy resin with ethanol after they were stirred by a dispersion process using homogenizer to be located far from the interface between reinforcement and matrix. In contrast, submicron fibers were attached onto the carbon fibers by injecting from a spray nozzle accompanying with ethanol to be located near the interface, after they were tentatively contained in ethanol. The plain-woven CFRP plates were fabricated by hand lay-up method and cured at 80 degree-C for 1 hour and then at 150 degree-C for 3 hours. After curing, the plain-woven CFRP plates were cut into the dimension of specimen. Tensile shear strength and Mode-II fracture toughness of CFRP were determined by tensile lap-shear test and End-notched flexure(ENF) test, respectively. When submicron fibers were located far from the interface between carbon fibers and epoxy resin, tensile shear strength and Mode-II fracture toughness of CFRP were improved 30% and 18% compared with those of unmodified case. The improvement ratio in modified case was rather low (about few percentages) in the case where submicron fibers were located near the interface. The result suggested that crack propagation should be prevented when submicron fibers were existed far from the interface due to the effective stress state around the crack tip.

Słowa kluczowe

EN

CFRP; Tensile shear strength; Mode-II fracture toughness; Submicron fibers

• Wydawca: De Gruyter Open
• Czasopismo: Curved and Layered Structures
• Rocznik: 2016
• Tom: 3
• Numer: 1

Daty

wydano

2016-01-01

otrzymano

2016-01-04

zaakceptowano

2016-01-26

online

2016-02-23

Twórcy

autor

Soichiro Kumamoto

• Graduate Student of Science and Engineering, Department of Mechanical Engineering, Doshisha University, Japan

autor

Kazuya Okubo

• Faculty of Science and Engineering, Doshisha University, Japan

autor

Toru Fujii

• Faculty of Science and Engineering, Doshisha University, Japan

Identyfikatory

DOI

10.1515/cls-2016-0008