ISSN: 0884-6804
Page Count: 9

Fiber-Reinforced Composite and Wood Bonded Interfaces: Part 2. Fracture
Trimble, BS
Distinguished teaching professor and graduate research assistant, West Virginia University, WV

Davalos, JF
Distinguished teaching professor and graduate research assistant, West Virginia University, WV

Qiao, P
Assistant professor, The University of Akron, OH

Abstract

The evaluation of durability and shear strength of FRP-wood bonded interfaces is presented in Part 1 of this two-part study (see Davalos et al. [1]); here, in Part 2, an innovative contoured double-cantilever beam (CDCB) specimen is used to evaluate Mode I fracture of bonded interfaces, and interface fracture toughness data are experimentally obtained for dry and wet conditions. The specimens are designed by the Rayleigh-Ritz method to achieve a linear rate of compliance with respect to crack length. The proposed CDCB specimen is an efficient tool to evaluate Mode I fracture of hybrid interfaces, and the fracture toughness data obtained can be used to predict whether or not a bonded interface will delaminate under general service conditions. Based on the results of this two-part study, recommendations and guidelines are given for evaluation and qualification of FRP-wood bonded interfaces; the methods presented are useful for designing bonded joints, evaluating in-service durability of interfaces, and obtaining fracture toughness data for FRP-wood material combinations.

Keywords:
fiber-reinforced plastics, wood, delamination, hybrid bonded interface, Mode I fracture, fracture toughness

Paper ID: CTR10545J
DOI: 10.1520/CTR10545J
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