Mechanical Analysis On The Impact Property Of Composite Cylindrical Shell

The major work of this paper is developed on the research of laminated composite shellssubjected to axial impact loads. Through the quasi-static compression test, its cushion energyabsorbing property is investigated, and finite element method is applied to simulate the dynamicresponse process of laminated shells under the drop impact.In Chapterâ… , the history and real-life meaning in this field are introduced. The presentresearch status of composite structure is summarized as well.In Chapterâ…¡, theories about the cushion energy absorbing property of the composite shells areintroduced, which are about the formula derivations of composite tube's dynamic responseprocess, analyses of the energy dissipating principle through experiment, and influence factorsof structure's crashworthiness.In Chapterâ…¢, the axial compression test of laminated shells is carried out, and its results areanalyzed emphatically. The effects of the ply methods and initiation mode on specific energyabsorption are investigated, as well as the contrast of three initiation modes including chamferstructure, cusp structure and fillet structure, which help to find a method to enhance the energyabsorbing property of this material.In Chapterâ…£, Ansys/LS-DYNA is introduced about its finite element method. With it, twomodels are employed to simulate laminated composite shells under the drop impact, and thecontrast is made between simulating results and experimental data.In Chapterâ…¤, the whole paper is summarized and some conclusions are obtained. Then, fartherinvestigations in this field are prospected.