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نویسنده :Roger Beauchamp
تاریخ:یکشنبه 28 تیر 1394-04:20 ب.ظ

Discrete Spring Model for Predicting Delamination Growth in Z-Fiber Reinforced Dcb Specimens pdf

Discrete Spring Model for Predicting Delamination Growth in Z-Fiber Reinforced Dcb Specimens by James G Ratcliffe

Discrete Spring Model for Predicting Delamination Growth in Z-Fiber Reinforced Dcb Specimens
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Author: James G Ratcliffe
Page Count: 44 pages
Published Date: 31 Jul 2013
Publisher: Bibliogov
Publication Country: United States
Language: English
ISBN: 9781287269632
File size: 41 Mb
File Name: Discrete.Spring.Model.for.Predicting.Delamination.Growth.in.Z-Fiber.Reinforced.Dcb.Specimens.pdf
Download Link: Discrete Spring Model for Predicting Delamination Growth in Z-Fiber Reinforced Dcb Specimens
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Beam theory analysis was applied to predict delamination growth in DCB specimens reinforced in the thickness direction with pultruded pins, known as Z-fibers. The specimen arms were modeled as cantilever beams supported by discrete springs, which were included to represent the pins. A bi-linear, irreversible damage law was used to represent Z-fiber damage, the parameters of which were obtained from previous experiments. Closed-form solutions were developed for specimen compliance and displacements corresponding to Z-fiber row locations. A solution strategy was formulated to predict delamination growth, in which the parent laminate mode I fracture toughness was used as the criterion for delamination growth. The solution procedure was coded into FORTRAN 90, giving a dedicated software tool for performing the delamination prediction. Comparison of analysis results with previous analysis and experiment showed good agreement, yielding an initial verification for the analytical procedure.

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