Experimental and numerical investigations on laser-welded corrugated-core sandwich panels subjected to air blast loading

Zhang, Pan; Cheng, Yuansheng; Liu, Jun; Wang, Chunming; Hou, Hetao; Li, Yong

doi:10.1016/j.marstruc.2014.11.007

Cited by 70 publications

(35 citation statements)

References 33 publications

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“…18). The effects of face sheet thickness tb (tf) for perfect lattice sandwich panel has been investigated by many previous scholars in other field such as bending, vibration and blast et al [38][39][40][41], some similar conclusions have been given.…”

Section: The Face Sheet Thickness Tb (Tf)mentioning

confidence: 72%

“…The static and dynamic mechanical behaviour of sandwich structures with lattice truss core is quite different from other traditional constructions, including those with honeycomb core or corrugated core. In the most previous studies, the static mechanism and energy absorption behaviour of sandwich structures with lattice truss core subjected to air explosion, underwater explosion and fragment penetration are widely concerned [38][39][40][41][42]. Up to date, water entry characteristics of sandwich structures with lattice truss core have rarely been studied.…”

mentioning

confidence: 99%

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Water Entry Hydroelasticity Analysis of Lattice Sandwich Panel With Imperfection: Simulation and Engineering Model

Wang¹,

Cheng²,

Pei³

et al. 2019

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In the present work, the three dimensional (3D) hydroelasticity characteristics of imperfect lattice sandwich panel (ILSP) subjected to water entry via analytical prediction and numerical simulations are proposed. Firstly, numerical investigations are performed on water entry characteristics based on Arbitrary Eulerian-Lagrange (ALE) coupling method for modeling fluid-structure interaction (FSI) at an impact velocity of 5.0m/s. The results show the impact pressure on total FSI surface of ILSP is generally lower than that of the perfect lattice sandwich panel. Then a novel semi-analytical method to calculate the elastic constants of ILSP is introduced. Based on this approach, an engineering computational model is developed to predict the deformation of ILSP, in which the total deformation is separated into two parts; local field deformation and global field deformation. Good agreement between the numerical and analytical results is achieved. And the effects of geometric parameters such as the thickness of face sheet, height of ILSP and relative density of core are discussed.

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Section: The Face Sheet Thickness Tb (Tf)mentioning

confidence: 72%

mentioning

confidence: 99%

Water Entry Hydroelasticity Analysis of Lattice Sandwich Panel With Imperfection: Simulation and Engineering Model

Wang¹,

Cheng²,

Pei³

et al. 2019

brod

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“…A lot of theoretical, numerical, and experimental studies have been conducted to find its failure mode, properties of the design and the behavioral of corrugated core sandwich structure [6,[9][10][11][12][13][14][34][35][36][37]. In Figure 2, Buannic et al [35] reported that corrugated core sandwich structure can be categorized into four different conventional geometries; straight, hat-type, triangular and curvilinear.…”

Section: Potential Of Natural Fiber For Corrugated Coresmentioning

confidence: 99%

“…Zhang et al [6,10,14] and Lim et al [13] used stainless steel sheet to study the dynamic and buckling response of trapezoidal corrugated core sandwich structure panels. As compared to Yan et al [12], the authors discussed more on bending points of sandwich beams using aluminum foam-filled and found out that foam insertions altered not only the failure mode of the corrugated sandwich but also increased dramatically its bending resistance.…”

Section: Potential Of Natural Fiber For Corrugated Coresmentioning

confidence: 99%

“…Many researchers have focused on the dynamic mechanical behavior of sandwich structures with corrugated cores. A variety of such structure of different metallic cores including stochastic foams, honeycombs, prismatic topologies, and lattice topologies have been investigated experimentally and numerically [6][7][8]. Between all sandwich structures, desirable solutions are the corrugated cores.…”

Section: Introductionmentioning

confidence: 99%

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Natural Fiber Reinforced Composites: A Review on Potential for Corrugated Core of Sandwich Structures

et al. 2016

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Abstract. Natural fibers, characterized by sustainability, have gained a considerable attention in recent years, due to their advantages of environmental acceptability and commercial viability. In this paper, the characterization of natural fibers including the mechanical properties and alkalization of fibers is presented. Most recent study had gone through the mercerization process to improve the toughness of natural fibers; which is a well-known hydrophilic material. Traditional reinforcement method was commonly used to fabricate a natural fiber composite such as hand lay-up and mold press due to its convenience in terms of time and cost. Also, different kind of matrix material used in different kind of natural fibers gave high impact on the tensile and flexural test result. By selecting appropriate chemical treatment, matrix material and fabrication method, the tensile and flexural test gives different results and findings. As most researchers tend to use metals to create corrugated cores for sandwich structure, it is possible to develop this structure using natural fibers such as kenaf, wood dust, and other natural fibers.

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Determination of thickness parameters of detonation shell and safety performance analysis

Ouyang

ChunWei

Xiaowen

et al. 2023

Engineering Reports

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On the premise of security, it is necessary to ensure good operational performance and technical indicators for nonlethal weapons such as flash detonation bombs. To make the weight of a flash detonation grenade more convenient for hand throwing and material costs save, the outer dimensions of the grenade body are fixed, and the optimal parameters of outer shell thickness of the vertigo grenade are explored. Based on the maximum deformation energy theorem, the strength of the shell with the obtained maximum thickness of 8 mm is checked, and then the optimal shell thickness under the ideal air explosion condition is obtained by reducing the thickness; Then check the thread strength to obtain the inner casing fracture, shock wave, and sound pressure level. The fragmentation performance test, detonation test, and sound pressure level test were carried out for the projectiles involving the shell thickness of 4 and 5 mm, and the simulation results were verified from three aspects of sound intensity, shell strength, and fragments. The results show that the maximum equivalent stress is 232.6 MPa and the maximum deformation is 1.07 × 10−4 mm when the outer shell thickness of the vertigo grenade is 5 mm, which is less than the material failure strength standard and no plastic deformation could occur. The structural connection strength of the missile body meets the standard. Most of the fragments are trapped in the cavity. The average sound pressure level at 1.5 m can reach 159.7 dB. The relative error between the sound pressure level at 3 m and the live ammunition test results is 4.8%, which meets the expected operational technical indicators and has good safety performance. The results of the numerical simulation can provide a reference for the design optimization and performance evaluation of similar vertigo grenades.

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Experimental and numerical investigations on laser-welded corrugated-core sandwich panels subjected to air blast loading

Cited by 70 publications

References 33 publications

Water Entry Hydroelasticity Analysis of Lattice Sandwich Panel With Imperfection: Simulation and Engineering Model

Water Entry Hydroelasticity Analysis of Lattice Sandwich Panel With Imperfection: Simulation and Engineering Model

Natural Fiber Reinforced Composites: A Review on Potential for Corrugated Core of Sandwich Structures

Determination of thickness parameters of detonation shell and safety performance analysis

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