1015 編物複合材料の編構造が初期破壊挙動に及ぼす影響

概要

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In this study, initial fracture behavior of weft plain and welt knitted fabric composite was considered. In order to clarify the initial fracture behavior, tensile testing of weft knitted fabric composites was performed and the knee point on the stress-strain curve was considered. Strain was obtained by strain gages. Strain values on local area were different by the characteristic deformation of knitted fabric composite. Knee point was found on the stress-strain curves. In the case of plain knitted composites, initial fracture was the transverse crack inside of fiber bundle in wale specimen, delamination from the fiber cross part in course specimen. On the other hand, in the case of welt knitted composites, initial fracture was the transverse crack inside of fiber bundle on welt loop in wale specimen, delamination from the fiber cross part in course specimen. From these results, initial fracture obtained from observation in knitted composites agreed with the knee point strain obtained from stress-strain curve. Moreover, initial fracture was different between plain and welt knitted composites.
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