Viscoelastic Effect on the Fracture Toughness of GFRP: Experimental Approach

Shirley Savet Lana; Hiroomi Homma; Kohji Nakazato

doi:10.4028/www.scientific.net/KEM.306-308.745

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 306-308Viscoelastic Effect on the Fracture Toughness of...

Viscoelastic Effect on the Fracture Toughness of GFRP: Experimental Approach

Abstract:

The dynamic fracture tests were carried out for a glass fiber reinforced plastic specimen with a crack and dynamic fracture toughness was evaluated by examination of cracking at an initial slit root. Before the crack initiated at the slit root, a whitened damage zone was created surrounding the slit tip. The damage zone consists of micro cracking in the matrix, debonding between a fiber and the matrix, and fracture of the fiber. The comparison of the dynamic fracture toughness and the static fracture toughness value shows that the former is around 12 MPa√m and apparently higher than the later, which is 7 MPa√m. To understand those experimental results and mechanics of the damage zone, a dynamic debonding test was carried out and dynamic bonding strength was estimated as around 70 MPa.

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Periodical:

Key Engineering Materials (Volumes 306-308)

Pages:

745-750

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.306-308.745

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Online since:

March 2006

Authors:

Shirley Savet Lana, Hiroomi Homma, Kohji Nakazato

Keywords:

Damage Zone, Debonding, Dynamic Fracture Toughness, Strain Rate, Viscoelasticity

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