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Ren S.,Xi'an Jiaotong University | Meng H.,Xi'an Jiaotong University | Xin F.,Xi'an Jiaotong University | Lu T.,Xi'an Jiaotong University | And 2 more authors.
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | Year: 2015

A theoretical model based on Hoff sandwich panel theory is proposed to investigate the vibration behavior of curved sandwich panels with square honeycomb cores. The square core is an equivalent isotropic layer and the curvature of the panel is taken into account. A finite element model considering all geometrical details is presented to investigate the influence of internal pressure and to validate the theoretical model. A systematic investigation is performed to quantify the influences of the morphological parameters of the square honeycomb core and the internal pressure. It is found that the vibration modes of the honeycomb sandwich panel are similar to those of a monolithic panel. The natural frequencies increase and are far beyond those of the monolithic panel with equal mass as the internal pressure increases. The results obtained from the present study show the advantage of curved sandwich panels in lightweight and high-safety, and are helpful for optimal design of this kind of lightweight structures. ©, 2015, Xi'an Jiaotong University. All right reserved.


Li B.,Northwestern Polytechnical University | Yu S.,Northwestern Polytechnical University | Du W.,Northwestern Polytechnical University | Chen Z.,Dongguan Yongqiang Vehicles Manufacturing Co.
Advances in Intelligent and Soft Computing | Year: 2011

Design management as effective means of improving design efficiency, strengthening enterprise innovation capability, reasonable arrangements for human resources, are more important to small and medium enterprises (SMEs). The implementation of FMEA (Failure Modes and Effects Analysis) as a design management sub-module is also increasingly used in advanced manufacturing enterprises, has made good gains. How introduce FMEA smoothly in small and medium enterprises is currently a research direction be solved, this paper presents the FMEA method for the implementation phase of product design, instructing the special vehicles enterprise to carry on design management, verify the validity of the method. © 2011 Springer-Verlag Berlin Heidelberg.


Han B.,Xi'an Jiaotong University | Wen C.,Xi'an Jiaotong University | Yu B.,Xi'an Jiaotong University | Ni C.,Xi'an Jiaotong University | And 5 more authors.
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | Year: 2014

It is proposed to insert polymer foams into the interstices of the corrugated core and the collapse of foam-filled corrugated sandwich beams subject to in-plane compression is investigated analytically and numerically to enhance the in-plane compression structural stability of the corrugated sandwich constructions that will be used as a kind of novel lightweight hulls for high speed strains and oil tanks. Failure mechanisms such as global elastic/plastic buckling and elastic/plastic face wrinkling are taken into account. The equivalent elastic constants of the foam-filled corrugations based upon the homogenization approach are employed to calculate the critical failure load of global buckling, and analytical formulae of face wrinkling are given by treating the foam insertion as Winkler-type elastic foundation. A failure mechanism map is constructed by using the material properties of 304 stainless steel and Rohacell 51 foam, and then three different constructions are designed to numerically probe different failure modes. It is shown that the analytical predictions accurately capture both the critical failure load and the failure mechanism. The minimum weight optimization design to foam-filled corrugated sandwich beams subject to in-plane compression is carried out and compared with competitive structures to obtain the optimal geometrical dimension of structure. Comparisons on considering the features such as load bearing, energy absorption, vibration damping, heat insulation and other multi-functional characteristics show that the foam-filled corrugated sandwich has greater potential in engineering application over empty corrugated and pyramidal sandwiches. ©, 2014, Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University. All right reserved.


Yu B.,Xi'an Jiaotong University | Han B.,Xi'an Jiaotong University | Ni C.,Xi'an Jiaotong University | Liu J.,Xi'an Jiaotong University | And 4 more authors.
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | Year: 2015

Two corrugated aluminum sandwich structures with empty and PMI foam filling are proposed to improve the strength and crashworthiness of oil tank structure under impact loading, and to provide substitutes for traditional monolithic counterpart. Aluminum foam projectile impact test is conducted to investigate the dynamic performance of the sandwich beams with the two proposed configurations. High-velocity photography is employed to capture the features of the beam deflecting process. The deflection history at the mid-span of the back face, as well as the deformation and failure modes, is studied for different sandwich beams with same total weight. Experimental results show that when impact velocities are relatively high, the corrugated core of empty sandwiches is significantly compressed and the front face experiences large scale indentation and severe tearing, whereas both core compression and front face tearing in foam-filled sandwiches are significantly reduced as a result of foam filling. The back face deflection of a foam-filled sandwich is nonetheless larger than that of an empty sandwich. From a realistic point of view, the filled sandwich is preferable compared to the empty sandwich. ©, 2015, Xi'an Jiaotong University. All right reserved.


Yu B.,Xi'an Jiaotong University | Han B.,Xi'an Jiaotong University | Xu Y.,Xi'an Jiaotong University | Ni C.,Xi'an Jiaotong University | And 2 more authors.
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2014

It is reported that sandwich beam with PMI foam filled corrugated core undergo larger mid-span deflection compared to that of empty cored beam. In order to explain the observed phenomenon and to reveal the underlying mechanism, numerical simulations of the dynamic response of empty and foam-filled corrugated cored sandwich beams loaded by aluminum foam projectiles have been performed based on commercial finite element code ABAQUS/Explicit. Influence of debonding between face sheets and cores is accessed by considering two bonding conditions: perfect bonding and no bonding. Experimental measurement is found to lie between the results for the two cases. Good agreement is found between the experimental results and FE predictions. The plastic dissipation of the substructures and the velocity history at the face sheet centers are analyzed for two types of sandwich beams. It is concluded that by foam filling the core strength is increased, resulting in more significant support to both front and back face sheets. The support to front face sheet reduces tearing while the support to back face sheet causes larger back face deflections. ©, 2014, Xi'an Jiaotong University. All right reserved.


Zhang Q.,Xi'an Jiaotong University | Yang L.,Xi'an Jiaotong University | Han B.,Xi'an Jiaotong University | Jin F.,Xi'an Jiaotong University | And 2 more authors.
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2014

Lightweight design in tank trucks has been important for quite some time to realize energy-saving and emission reduction, which will enhance the competitiveness of enterprises. This paper focus on the issue of lightweight design in the plate structures, and asymmetric corrugated sandwich panels are designed with approximately 20% of weight loss compared with existing solid aluminum plates. Aluminum sandwich panels with corrugated core having the platform structure are fabricated by molding and adhesive bonding techniques. Failure modes of asymmetric corrugated sandwich panels loaded by the three-point bending are analyzed theoretically, and their failure mode maps are also plotted. Three-point bending tests of asymmetric corrugated aluminum are compared with ones of the solid sheet, and used to verify the failure modes of asymmetric corrugated sandwich panels. Results obtained show that in the three-point bending tests, asymmetric corrugated aluminum sandwich panels are still significantly higher than solid aluminum sheets in stiffness and strength. ©, 2014, Xi'an Jiaotong University. All right reserved.


Cheng Z.,Xi'an Jiaotong University | Yu B.,Xi'an Jiaotong University | Ni C.,Xi'an Jiaotong University | Ci J.,Xi'an Jiaotong University | Geng L.,Dongguan Yongqiang Vehicles Manufacturing Co.
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2014

We study in this paper the shock resistance of the sandwich structure as the head of oil tank car under impact loading by using finite element code: ABAQUS. The dynamic response of solid plate and the all-metallic sandwich having three different types of core topology: Square honeycomb core, corrugated core and cross tube core is simulated and analyzed. The effect of varying core thickness is also investigated. The four kinds of plates have the same density per unit area. The focus is placed upon on the energy absorption capabilities and maximum deflections of different plates having the same density per unit area. Results of the study indicate that square honeycomb sandwich plate in ideal model is an excellent sandwich structure with strongest energy absorption capability and smallest deflection in all-metallic sandwich plates under the blast loading. However, when considering welding defects, it has a great influence on the performance of square honeycomb plate. On the contrary, cross tubes sandwich shows their great performances in this condition, because of its surface contact between core part and face plates.


Han B.,Xi'an Jiaotong University | Yu B.,Xi'an Jiaotong University | Qin K.,Xi'an Jiaotong University | Zhang Q.,Xi'an Jiaotong University | And 2 more authors.
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2014

As one type of ultra-light porous materials, lattice sandwich structures are widely focused on these years, especially in the field of aeronautics and aerospace, automobile, as well as rail transport. These structures are inevitably subjected to various impact loads in practical application. The study on impact resistance of lattice sandwich structures has become a hotspot. By using the commercial finite element program ANSYS/LS-DYNA, we study the impact resistance of lattice sandwich plates, which have four different types of core topology: corrugated core, square core, triangle core and pyramidal core. The dynamic response of lattice sandwich plates under rigid body impacting has been simulated and analyzed. The four kinds of lattice sandwich structures have the same core density and the same mass per unit area. The velocity of the rigid body ranges from 75~150m/s. And each kind of plate is simulated in two different impact positions. By analyzing the results of simulation, we discuss the mechanism of deformation and the characteristics of energy absorption. The study implies that, in the four kinds of lattice sandwich plates, the plate with corrugated core shows the best capacity of impact resistance.

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