Interlaminar fracture and low-velocity impact of carbon/epoxy composite materials
SCIE
SCOPUS
- Title
- Interlaminar fracture and low-velocity impact of carbon/epoxy composite materials
- Authors
- Hwang, JH; Kwon, O; Lee, CS; Hwang, W
- Date Issued
- 2000-03
- Publisher
- CONSULTANTS BUREAU
- Abstract
- The interlaminar fracture and the low-velocity impact behavior of carbon/epoxy composite materials have been studied using width-tapered double cantilever beam (WTDCB), end-notched flexure (ENF), and Boeing impact specimens. The objectives of this research are to determine the essential parameters governing interlaminar-fracture and damage of realistic laminated composites and to characterize a correlation between the critical strain energy release rates measured by interlaminar fracture and by low-velocity impact tests. The geometry and the lay-tip sequence of specimens are designed to probe various conditions such as the skewness parameter, beam volume, and test fixture. The effect of interfacial ply orientations and crack propagation directions on interlaminar fracture toughness and the effect of ply orientations and thickness on impact behavior ar-e examined. The critical strain energy release rare was calculated from the respective tests: in the interlaminar fracture test the compliance method and linear beam theory are used; the residual energy calculated from the impact test and the total delamination area estimated by ultrasonic inspection are used ill the low-velocity, impact test. Results show that the critical strain energy release rate is affected mainly by ply orientations. The critical strain energy release rate measured by the low-velocity impact test lies between the mode I and mode II critical strain energy release rates obtained by the interlaminar fracture test.
- Keywords
- carbon/epoxy composites; interfacial ply orientation; crack propagation direction; interlaminar fracture; strain energy release rate; low-velocity impact; residual energy; delamination; ultrasonic inspection; UNDERSTANDING DAMAGE MECHANISMS; GLASS-EPOXY COMPOSITE; MODE-I; LAMINATED COMPOSITES; STATIC INDENTATION; GRAPHITE EPOXY; TOUGHNESS TEST; CFRP; PRESTANDARDIZATION; DELAMINATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19854
- DOI
- 10.1007/BF02681828
- ISSN
- 0191-5665
- Article Type
- Article
- Citation
- MECHANICS OF COMPOSITE MATERIALS, vol. 36, no. 2, page. 117 - 130, 2000-03
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