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- W2765781566 abstract "This paper focuses on a technique developed to monitor and track automatically the crack propagation at two sides of the corner of a coupon to investigate the corner effect on the fracture toughness of the high strength cold-formed steel channel sections. The coupons taken longitudinally along the corners of channel sections were initially pre-cracked at both sides under fatigue loading and then loaded monotonically under tension until failure. When assessing the fracture toughness, it was particularly important to identify the precise moment of initiation and propagation of the pre-existing cracks. The technique was based on image processing with a grid of circular targets attached on the surface prior to the monotonic test and used for scaling and orientating all acquired images. A digital correlation procedure was applied to track both edges of the notch of each crack and quantify its opening during the test. By correlating the changes in the rate of crack mouth opening, the different stages of propagation could be identified together with the corresponding critical loads. The fracture toughness is determined based on these critical loads which could not be captured directly from the load versus axial displacement curves." @default.
- W2765781566 created "2017-11-10" @default.
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- W2765781566 date "2017-10-21" @default.
- W2765781566 modified "2023-09-27" @default.
- W2765781566 title "Image Processing in the Characterization of Crack Propagation in Cold-Formed Steel Samples" @default.
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- W2765781566 doi "https://doi.org/10.1007/978-981-10-6713-6_88" @default.
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