Jifeng Xu

Multi-scale characterization and progressive failure analysis of stitched aerogel sandwich structures for lightweight thermal protection systems

Linlin Deng, Jifeng Xu, Cheng Chen, Ziqing Hao et autres

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Improved mechanical performance of fiber metal laminates: Effects of interlaminar reinforcement process and lay-up structure optimization

Hangyu HE, Jifeng Xu, Buyun SU, Xueming Wang et autres

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Synergistic interfacial reinforcement in metal/composite joints: A molecular dynamics study

Hangyu HE, Jifeng Xu, Xueming Wang, Yanan Su et autres

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Interfacial adhesion enhancement in high‐modulus carbon fiber/poly (ether ether ketone) composites: Through the flexible macromolecule‐grafted‐carbon nanotubes sizing treatment

Yanan Su, Rongrong Qi, Chenyue Zhao, Lili Bai et autres

Abstract In this study, a flexible macromolecule‐grafted‐carbon nanotube (t‐CTN‐SPEEK) is developed and utilized as bridge to enhance the interfacial properties of high‐modulus carbon fiber (HM‐CF) reinforced poly (ether ether ketone) (PEEK) composites. With t‐CTN‐SPEEK sizing, the wettability of HM‐CF is enhanced, thereby …

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Carbon fiber pull-out analysis for composite materials by considering interface properties

Yan Wang, Kaihong Zheng, Fujiang Cui, Muhammad Saqib Hameed et autres

An improved shear-lag model is adopted in this paper to study the fiber pull-out by considering interface properties in a representative volume element (RVE). The surface roughness, represented by grooves distributed around the fiber, is introduced to analyze the influence of roughness …

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Numerical study on ultrasonic detection of cracks in metallic structures with variable cross-sectional thickness

Yan Wang, Rongxin Feng, Muhammad Saqib Hameed, Shuai Zhang et autres

Abstract The metal structures are widely used in aerospace engineering, especially in joints and spars. The safety of these parts is important to ensure the safe service of the whole structures. The ultrasonic wave is a traditional technique to detect cracks in …

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A simultaneous measurement method for multi-directional galloping of iced bundled conductors and its application in spatial galloping behavior

Fujiang Cui, Peng Liu, Han Wang, Zhiqiang Li et autres

Abstract The theoretical results indicate that iced bundled conductors experience spatial galloping due to wind-induced vibration, involving in-plane, out-of-plane, and torsional movements. To better understand the dynamic response of this behavior from an experimental perspective, an innovative experimental method has been proposed. …

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A Mori-Tanaka method based theoretical approximation for functionally graded thick wall tube under combined thermal and mechanical loads

Libiao Xin, Jifeng Xu, Zhiqiang Li, Yanbin Li

In this work, a FGM thick wall tube under both thermal and mechanical loadings is studied by referring to the Mori-Tanaka method. The studied FGM tube is assumed to be made of two distinct linear elastically deformable materials equipped with unique volume …

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Correlation of interfacial stress with the surface roughness of carbon fiber in composites by the improved shear-lag theory

Kaihong Zheng, Yan Wang, Rongxin Feng, Muhammad Saqib Hameed et autres

An improved shear-lag model is proposed in this article to study the effects of interface roughness and interfacial stiffness on the mechanical properties of a representative volume element (RVE). The surface roughness of the fiber is represented by grooves distributed around the …

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A novel approach to simulate the resin infusion process by two phases coupling free and porous flows intra and inter fiber tows of liquid composite molding

Chen Li, Jia Yen Huang, Tianliang Qin, Cheng Chen et autres

In this work, a coupling Cahn-Hilliard-Navier-Stokes-Darcy two-phase flow model is developed to simulate the resin infusion process intra and inter fiber tow. Navier–Stokes equation is applied in the free flow region while two phases Darcy’s law governs flow in the porous medium. …

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The boundary element method of peridynamics

Liang Xue, Linjuan Wang, Jifeng Xu, Jianxiang Wang

Abstract The peridynamic theory brings advantages in dealing with discontinuities, dynamic loading, and nonlocality. The integro‐differential formulation of peridynamics poses challenges to numerical solutions of complicated and practical problems. Some important issues attract much attention, such as the computation of infinite domains, …

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Bolt Load Calculation for Hybrid Joint Considering Friction and Nonlinear Stiffness under Combined Thermal and Mechanical Loads

Tiren He, Jifeng Xu, Kaige Zhu, Haijun Wang

Abstract An improved analytical method for calculating the bolt load distribution in single-lap or double-lap multi-bolt composite-metal joint structure considering material nonlinear behaviour and thermal stress is proposed in this paper. The analytical method is based on the stiffness method and the …

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