Interfacial structure-governed free vibration response of laser cladded cylindrical shells

IF 4.7 3区材料科学 Q2 ENGINEERING, MECHANICAL

International Journal of Mechanics and Materials in Design Pub Date : 2026-03-30 DOI:10.1007/s10999-026-09901-9

Guosheng Ji, Peirong Zhang, Guosheng Su, Jin Du, Chonghai Xu, Zhanqiang Liu, Yinling Li, Bingzhi Du

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Abstract

Laser cladding has been extensively employed in surface repair of engineering components. However, the combination of cylindrical shells and heterogeneous cladding layers will exacerbate its instability. This study investigated the free vibration characteristics of a composite cylindrical shell fabricated via laser cladding. The interfacial region was idealized as a functionally graded layer with homogeneous mixing, where different interfacial geometries were represented by distinct material volume fraction functions across the thickness. Based on the first-order shear deformation theory (FSDT), and with artificial springs used to simulate boundary conditions, the governing equations for free vibration were derived. The natural frequencies and mode shapes were then determined using the Rayleigh–Ritz method. Comparison with finite element simulations confirmed the accuracy of the proposed model. A comprehensive parametric study was performed to examine the effects of interfacial structure—including shape, depth, and spacing—on the dynamic stiffness of the cylindrical shell. The results revealed that the fundamental frequency of cylindrical shells decreases as the interface layer thickness increases while as the groove spacing decreases. The triangular interface shows the least sensitivity to both interfacial depth and spacing, followed by the arc-shaped interface. An increase in the thickness-to-radius ratio leads to a monotonic increase in shell stiffness under all boundary conditions. Based on this research, it can provide theoretical guidance for the surface repair of weakly rigid structural components.

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激光包覆圆柱壳界面结构控制的自由振动响应

激光熔覆技术已广泛应用于工程部件的表面修复。但非均质包层与圆柱壳的结合会加剧其不稳定性。研究了激光熔覆法制备的复合材料圆柱壳的自由振动特性。界面区域被理想化为具有均匀混合的功能梯度层，其中不同的界面几何形状由不同厚度的材料体积分数函数表示。基于一阶剪切变形理论（FSDT），利用人工弹簧模拟边界条件，推导了自由振动的控制方程。然后用瑞利-里兹法确定了固有频率和模态振型。通过与有限元仿真的比较，验证了所提模型的准确性。进行了一项全面的参数研究，以检查界面结构（包括形状、深度和间距）对圆柱壳动刚度的影响。结果表明：随着界面层厚度的增加和凹槽间距的减小，圆柱壳的基频减小；三角形界面对界面深度和界面间距的敏感性最小，其次是弧形界面。在所有边界条件下，厚度半径比的增加导致壳体刚度单调增加。研究结果可为弱刚性构件的表面修复提供理论指导。

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来源期刊

International Journal of Mechanics and Materials in Design ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

6.00

自引率

5.40%

发文量

审稿时长

>12 weeks

期刊介绍： It is the objective of this journal to provide an effective medium for the dissemination of recent advances and original works in mechanics and materials'' engineering and their impact on the design process in an integrated, highly focused and coherent format. The goal is to enable mechanical, aeronautical, civil, automotive, biomedical, chemical and nuclear engineers, researchers and scientists to keep abreast of recent developments and exchange ideas on a number of topics relating to the use of mechanics and materials in design. Analytical synopsis of contents: The following non-exhaustive list is considered to be within the scope of the International Journal of Mechanics and Materials in Design: Intelligent Design: Nano-engineering and Nano-science in Design; Smart Materials and Adaptive Structures in Design; Mechanism(s) Design; Design against Failure; Design for Manufacturing; Design of Ultralight Structures; Design for a Clean Environment; Impact and Crashworthiness; Microelectronic Packaging Systems. Advanced Materials in Design: Newly Engineered Materials; Smart Materials and Adaptive Structures; Micromechanical Modelling of Composites; Damage Characterisation of Advanced/Traditional Materials; Alternative Use of Traditional Materials in Design; Functionally Graded Materials; Failure Analysis: Fatigue and Fracture; Multiscale Modelling Concepts and Methodology; Interfaces, interfacial properties and characterisation. Design Analysis and Optimisation: Shape and Topology Optimisation; Structural Optimisation; Optimisation Algorithms in Design; Nonlinear Mechanics in Design; Novel Numerical Tools in Design; Geometric Modelling and CAD Tools in Design; FEM, BEM and Hybrid Methods; Integrated Computer Aided Design; Computational Failure Analysis; Coupled Thermo-Electro-Mechanical Designs.