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はく離を有する積層はりの曲げによる局所座屈 ハクリ オ ユウスル セキソウハリ ノ マゲ ニヨル キョクショ ザクツ Local Delamination Buckling of a Laminated Beam Caused by Bending 1000090026279 戸谷, 真之 Toya, Masayuki トヤ, マサユキ 1000070452927 深川, 和良 Fukagawa, Kazuyoshi フカガワ, カズヨシ 山川, 史慎 Yamakawa, Fuminori ヤマカワ, フミノリ 1000060094116 有冨, 正男 Aritomi, Masao アリトミ, マサオ open access 社団法人日本機械学会 Laminated Beam Delamination Local Buckling Bending Energy Release Rate Three- and four-point bending of a layered beam with a delamination are analyzed on the basis of classical beam theory. Axial tensile and compressive forces are induced by bending in the parts of the beam above and below the delamination. When one of the constituent beams is thin enough, the axial compression causes local delamination buckling. The problem of determining the critical buckling load is reduced to the solution of a characteristic equation. The critical load and the relation between the magnitude of the applied load and the deflection at the point of load application predicted from the analyses are shown to agree well with experiments. The nonzero energy release rates are also predicted for four-point bending, which implies that the delamination can spread via local buckling. 社団法人日本機械学会 1996 jpn journal article VoR http://hdl.handle.net/10232/10533 https://ir.kagoshima-u.ac.jp/records/4484 03875008 AN0018742X 日本機械学會論文集. A編 Transactions of the Japan Society of Mechanical Engineers. A 62 602 2242 2249 https://ir.kagoshima-u.ac.jp/record/4484/files/AN0018742X_v62_n602_p2242-2249.pdf application/pdf 511.5 kB 2016-10-27 1996-10-25