首页|Transient response of doubly-curved bio-inspired composite shells resting on viscoelastic foundation subject to blast load using improved first-order shear theory and isogeometric approach

Transient response of doubly-curved bio-inspired composite shells resting on viscoelastic foundation subject to blast load using improved first-order shear theory and isogeometric approach

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Investigating natural-inspired applications is a perennially appealing subject for scientists.The current increase in the speed of natural-origin structure growth may be linked to their superior mechanical properties and environmental resilience.Biological composite structures with helicoidal schemes and designs have remarkable capacities to absorb impact energy and withstand damage.However,there is a dearth of extensive study on the influence of fiber redirection and reorientation inside the matrix of a helicoid structure on its mechanical performance and reactivity.The present study aimed to explore the static and transient responses of a bio-inspired helicoid laminated composite(B-iHLC)shell under the influence of an explosive load using an isomorphic method.The structural integrity of the shell is maintained by a viscoelastic basis known as the Pasternak foundation,which encompasses two co-efficients of stiffness and one coefficient of damping.The equilibrium equations governing shell dy-namics are obtained by using Hamilton's principle and including the modified first-order shear theory,therefore obviating the need to employ a shear correction factor.The paper's model and approach are validated by doing numerical comparisons with respected publications.The findings of this study may be used in the construction of military and civilian infrastructure in situations when the structure is sub-jected to severe stresses that might potentially result in catastrophic collapse.The findings of this paper serve as the foundation for several other issues,including geometric optimization and the dynamic response of similar mechanical structures.

Blast loadModified first-order shear theoryBiological composite structures

Thuy Tran Thi Thu、Tu Nguyen Anh、Hue Nguyen Thi、Hong Nguyen Thi

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School of Mechanical and Automotive Engineering,Hanoi University of Industry,Hanoi,Viet Nam

Faculty of Technical Fundamental,University of Transport Technology,Hanoi,Viet Nam

Faculty of Mechanical Engineering,Thuyloi University,175 Tay Son,Dong Da,Hanoi,Viet Nam

2024

10.1016/j.dt.2024.02.003

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.38(8)