損傷力学手法に基づく複合材料機械的継手部の面圧破壊挙動シミュレーション

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  • 肖 毅
    独立行政法人航空宇宙技術研究所先進複合材評価技術開発センター
  • 石川 隆司
    独立行政法人航空宇宙技術研究所先進複合材評価技術開発センター

書誌事項

タイトル別名
  • Failure Behavior Simulation for Bolted Composite Joints Based on Damage Mechanics Approach
  • ソンショウ リキガク シュホウ ニ モトヅク フクゴウ ザイリョウ キカイテキ ツギテブ ノ メンアツ ハカイ キョドウ シミュレーション

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This paper presents the development of an accumulative damage model based on continuum damage mechanics (CDM) to simulate the bearing failure and response in the bolted composite joints. The simulation is implemented into a general-purpose FEM code ABAQUS. The main damage mechanisms observed from experimental study are described as accumulated compressive damage that appeared by matrix compression failure and fiber compression-shear failure. The fundamental approach consists of contact problem at the pin/hole interface, progressive damage, large deformation problem and material nonlinear problem. A complex approach based on a nonlinear shear elasticity theory combined with a continuum damage mechanics approach can be also utilized to represent the material nonlinear behavior during loading. The damage accumulation criteria using the hybrid method based on Hashin and Yamada-Sun’s failure criteria are adopted, and the stress redistribution analysis using a degradation model for the damaged ply is performed. The accurate prediction results include progressive damage and strength response of the joints that agrees well with the existing experimental data.

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