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DESIGN, PROCESSING AND CHARACTERIZATION OF JUTE AND PALM NATURAL FIBERS SANDWICH COMPOSITE PANELS AHMED, ELSAYED ABDELFATTAH ELBADRY アフメッド, エルサイド アブデルファッタ エルバドリ open access Jute mat unsaturated polyester palm mat Glass cloth jute cloth hand lay-up method recycling hybrid composites natural composites impact properties mechanical properties residual tensile strength Characteristic distance flexural modulus tensile modulus fiber pull out stress distribution fracture toughness fracture surface FEM 2013-09-25 eng doctoral thesis http://hdl.handle.net/10212/2154 https://kit.repo.nii.ac.jp/records/2000097 甲第686号 博士（学術） 2013-09-25 京都工芸繊維大学 https://kit.repo.nii.ac.jp/record/2000097/files/D1-0686.pdf application/pdf 312.8 KB https://kit.repo.nii.ac.jp/record/2000097/files/AHMED ELSAYED ABDELFATTAH ELBADRY_thesis abstract.pdf application/pdf 31.3 KB