Lei Zu
Hefei University of Technology
Composite numberUltimate tensile strengthPressure vesselFinite element methodComposite materialGeodesicShrinkageViscoelasticityMaterials scienceConstitutive equationTension (physics)MandrelStiffnessFilament windingResidual stressFiberDisplacement (vector)Structural engineeringBucklingStress (mechanics)
31Publications
11H-index
330Citations
Publications 32
Newest
#1Zhengyun Hu (NUAA: Nanjing University of Aeronautics and Astronautics)
#2MingHe Chen (NUAA: Nanjing University of Aeronautics and Astronautics)
Last. Ke Xu
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Abstract In this paper various lay-up schemes were designed for a 70MPa Type IV hydrogen storage vessel to evaluate the effects of different stacking sequences on the ultimate strength. The netting theory was here used to calculate the laminate thickness and twelve lay-up schemes were selected. The user subroutine UMAT provided by the general software ABAQUS was then introduced to define the composite material properties. The progressive damage model using the Hashin failure theory was created t...
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#1Qiaoguo Wu (Hefei University of Technology)
#2Qiankun Wang (Hefei University of Technology)
Last. Guiming Zhang (Hefei University of Technology)
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Abstract Experimental and numerical studies are performed on perforation of carbon fiber-wound composite cylinders struck by hemispherical and conical-nosed impactors. Drop-hammer impact tests are conducted at the impact velocity of 4.5 m/s and the impact energy of 405 J. The damage morphologies and failure mechanisms of the cylinders are then analyzed. The change laws of the impact responses and the absorbed energies of the cylinders impacted by impactors with different nose-shapes are revealed...
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#1Song LinH-Index: 1
#2Liuqing YangH-Index: 1
Last. Lei Zu (Hefei University of Technology)H-Index: 11
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Abstract This study proposed a method for progressive failure analysis to investigate the failure modes of 35 MPa Type III composite pressure vessels during hydraulic burst tests. Representative volume elements (RVEs) were introduced, and the degraded elastic parameters of composite, which include fibre and matrix failure modes, were calculated by the finite element analysis (FEA) method to obtain the macroscopic stiffness degradation parameters. The Puck failure criterion was adopted, and the e...
1 CitationsSource
#1Lei ZuH-Index: 11
#2Hui XuH-Index: 5
Last. Debao LiH-Index: 5
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Abstract In this paper, a design of the non-axisymmetric composite electromagnetic gun barrel is proposed. A finite element model is established to simulate the mechanical behaviors of the composite electromagnetic gun barrel based on equivalent temperature cooling method. In the process of analysis, the effect of fiber tension, curing times and interaction between each composite layer are discussed. The results show that with increase of fiber layers, the fiber tension of inner layer will be re...
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#1Qian Zhang (Hefei University of Technology)H-Index: 2
#2Hui Xu (Hefei University of Technology)H-Index: 5
Last. Huabi Wang (Hefei University of Technology)H-Index: 4
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Abstract The aim of this study is to propose methods for dome thickness distribution and the charge pressure of the liner for a 70MPa type IV hydrogen storage vessel. The netting theory was employed to design the lay-up of the cylindrical section. For precise prediction of the dome thickness, a cubic spline function was utilized. Variable polar radii were used to reduce the fiber stacking and thickness accumulation near polar openings. To evaluate the designed lay-up, various failure criteria we...
5 CitationsSource
#1Lei Zu (Hefei University of Technology)H-Index: 11
#2Hui Xu (Hefei University of Technology)H-Index: 5
Last. Bingzhan Zhang (Hefei University of Technology)H-Index: 2
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Abstract A novel design approach has been proposed to generate winding paths for composite pressure vessels with unequal dome parts. The experiments were carried out to obtain the mandrel profiles after each update of composite layers, and then the winding paths were generated to accommodate the updated profiles. To evaluate the effect of mandrel profiles updated by composite layers on the winding paths, the variety of winding angles and dome thickness distribution as well as the slippage coeffi...
1 CitationsSource
#1Bing Zhang (Hefei University of Technology)H-Index: 5
#2Kanglong Chen (Hefei University of Technology)H-Index: 1
Last. Lei Zu (Hefei University of Technology)H-Index: 11
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Abstract In this study, a computational method based on matrix perturbation theory was proposed to solve the aeroelastic sensitivity of the fibre angle of tow-steered composite wings and find the optimal local fibre paving path for aeroelastic tailoring. Firstly, the finite element model of straight fibre composite wing was created with the multilayer composite shell element in MSC/NASTRAN. Then, the flutter velocity-sensitive region with local fibre angle was determined using matrix perturbatio...
2 CitationsSource
#1Lei Zu (Hefei University of Technology)H-Index: 11
#2Hui Xu (Hefei University of Technology)H-Index: 5
Last. Debao Li (Hefei University of Technology)H-Index: 5
view all 6 authors...
Abstract One of the most key issues for design and production of composite spherical pressure vessels reflects on determination of the stress distributions and burst failure load of the vessels. The main objective of this study is to carry out the investigation of the stress/strain distributions and the ultimate strength analysis for filament-wound composite spherical pressure vessels based on non-geodesic winding trajectories. The non-geodesic patterns were simulated to determine the appropriat...
6 CitationsSource
#1Bing Zhang (Hefei University of Technology)H-Index: 5
#2Yangjun Ge (Hefei University of Technology)H-Index: 1
Last. Hui Xu (Hefei University of Technology)H-Index: 5
view all 4 authors...
Abstract In this paper a dynamic mesh method based on diffusion equation and nodal rotation is developed for high-aspect-ratio composite wings. Mesh displacement is described by diffusion equation and calculated by finite element method. The mesh was distorted because the displacement of the mesh nodes is uncoupled in different directions, and its quality diminished due to large deformation. The nodal rotational method is introduced to solve this problem. The technique used the same diffusion eq...
2 CitationsSource
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