Threadwise Analysis of Woven Fabric Composites

Material type: 文書・図像類

Author: 石川, 隆司ほか

Publisher: 航空宇宙技術研究所

Publication date: 1983-11

Material Format: Digital

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Note (General)：: 織布複合材料の弾性係数の上下界定理を,該複合材をモザイク状に理想化したモデルと,一様歪及び一様応力の仮定から導いた。次に,上述の解析で無視された,繊維のうねりと連続性を考慮した近似解析を行なった。この結果とモザイクモデルの解を比べた場合,繊維のうねりは面内剛性を下げるが,引張一曲げカップリングには影...

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Material Type: 文書・図像類
Title: Threadwise Analysis of Woven Fabric Composites
Author/Editor: 石川, 隆司
ISHIKAWA, Takashi
CHOU, Tsu-Wei
Author Heading: 石川, 隆司
ISHIKAWA, Takashi
CHOU, Tsu-Wei
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 1983-11
Publication Date (W3CDTF): 1983-11
Periodical title: Technical Report of National Aerospace Laboratory TR-792T
No. or year of volume/issue: 792T
Volume: 792T
Pages: 17-
ISSN (Periodical Title): ISSN : 0389-4010
Text Language Code: eng
Target Audience: 一般
Note (General): 織布複合材料の弾性係数の上下界定理を,該複合材をモザイク状に理想化したモデルと,一様歪及び一様応力の仮定から導いた。次に,上述の解析で無視された,繊維のうねりと連続性を考慮した近似解析を行なった。この結果とモザイクモデルの解を比べた場合,繊維のうねりは面内剛性を下げるが,引張一曲げカップリングには影響しないことが判明した。一次元的な曲げ挙動に対する板厚方向の剪断剛性の影響を考慮した修正項も導入された。2次元有限要素解析をも行なった結果,各々の近似解は,面内,カップリング,曲げの各係数について,それぞれ対応する有限要素解とよく一致することが確認された。有限要素解の収束状況,境界条件の影響等も精査されている。最後に,繊維のうねりの深さの面内剛性への影響が調べられた。
The upper and lower bounds of elastic stiffness and compliance constants of woven fabric composites are derived based upon a mosaic-like model as well as the assumptions of constant stress and constant strain. An approximate analysis taking into account fiber undulation and continuity also is conducted. The results indicate that fiber undulation leads to slight softening of the in-plane stiffness and does not affect the stretching-bending coupling constants, as compared to the results of a mosaic model. A transverse shear deformation is adopted and modified to examine the one dimensional bending response of fabric composites. The results of a two-dimensional finite element analysis show good agreement with the predictions of the in-plane, coupling and bending constants based upon the fiber undulation, mosaic and transverse shear deformation theory, respectively. Convergence characteristics and some effects of boundary conditions in finite element analysis are examined before comparison. The effect of fiber undulation shape on the in-plane comliance also is investigated.
資料番号: NALTR0792000
レポート番号: NAL TR-792T
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ