Investigation on Dynamic Behavior of a Porous FGM Sandwich Doubly Curved Plate under Multiple Blast Loads

IF 0.9 4区工程技术 Q4 MECHANICS

Mechanics of Solids Pub Date : 2025-08-26 DOI:10.1134/S0025654425601235

Yang Yang, Yi-Nan Qi, Hong-Liang Dai

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引用次数: 0

Abstract

Porous functional gradient material (FGM) sandwich structures are widely used in various fields. However, the study of their dynamic response under multiple blast excitations is lacking. This paper develops a nonlinear dynamic model of a porous FGM sandwich hyperbolic panel based on Winkler-Pasternak elastic foundation and von Kármán strain-displacement relations. The model comprehensively incorporates the effect of material inhomogeneity, geometric nonlinearity, and time-varying blast loading for the first time. Subsequently, a numerical solution strategy is constructed by coupling the finite difference method in the spatial domain with the Newmark method in the time domain. In addition, the effects of porosity distribution, geometric parameters, foundation stiffness, and blast load parameters on the structural response frequency, deflection amplitude, and damping performance are investigated. Results reveal that sandwich panels with uniformly distributed porosity in the FGM exhibit superior dynamic stability and blast resistance under repeated explosive loads. The findings can provide theoretical support and engineering guidance for the blast-resistant design and intelligent optimization of novel porous FGM sandwich composite structures.

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多重爆炸荷载作用下多孔FGM夹层双弯曲板动力特性研究

多孔功能梯度材料（FGM）夹层结构广泛应用于各个领域。然而，对其在多重爆炸激励下的动力响应研究较少。基于Winkler-Pasternak弹性基础和von Kármán应变-位移关系，建立了多孔FGM夹层双曲板的非线性动力学模型。该模型首次综合考虑了材料不均匀性、几何非线性和时变爆炸载荷的影响。在此基础上，将空间域的有限差分法与时间域的Newmark法相结合，构建了数值求解策略。此外，还研究了孔隙率分布、几何参数、基础刚度和爆炸荷载参数对结构响应频率、挠度幅值和阻尼性能的影响。结果表明，多孔性分布均匀的FGM夹层板在重复爆炸荷载作用下具有优异的动稳定性和抗爆炸性能。研究结果可为新型多孔FGM夹层复合材料结构的抗爆设计和智能优化提供理论支持和工程指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mechanics of Solids 医学-力学

CiteScore

1.20

自引率

42.90%

发文量

112

审稿时长

6-12 weeks

期刊介绍： Mechanics of Solids publishes articles in the general areas of dynamics of particles and rigid bodies and the mechanics of deformable solids. The journal has a goal of being a comprehensive record of up-to-the-minute research results. The journal coverage is vibration of discrete and continuous systems; stability and optimization of mechanical systems; automatic control theory; dynamics of multiple body systems; elasticity, viscoelasticity and plasticity; mechanics of composite materials; theory of structures and structural stability; wave propagation and impact of solids; fracture mechanics; micromechanics of solids; mechanics of granular and geological materials; structure-fluid interaction; mechanical behavior of materials; gyroscopes and navigation systems; and nanomechanics. Most of the articles in the journal are theoretical and analytical. They present a blend of basic mechanics theory with analysis of contemporary technological problems.