scholarly journals Prediction and prevention of fracture defect in plastic forming for aluminum foam sandwich panel

2021 ◽  
Vol 15 ◽  
pp. 1145-1154
Author(s):  
Xi Zhang ◽  
Qing-Min Chen ◽  
Zhong-Yi Cai
Keyword(s):  
Aluminum Foam ◽  
Sandwich Panel ◽  
Prediction And Prevention ◽  
Plastic Forming

scholarly journals Numerical Study on the Plastic Forming of Doubly Curved Surfaces of Aluminum Foam Sandwich Panel Using 3D Voronoi Model

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 675
Author(s):  
Xi Zhang ◽  
Qingmin Chen ◽  
Jiaxin Gao ◽  
Mingwei Wang ◽  
Ya Zhang ◽  
...  
Keyword(s):  
Aluminum Foam ◽  
Sandwich Panel ◽  
Face Sheet ◽  
Thickness Variation ◽  
Shape Error ◽  
Curved Surfaces ◽  
The Face ◽  
Plastic Forming ◽  
Doubly Curved ◽  
Forming Defects

This paper presents a numerical investigation on the plastic forming of doubly curved surfaces of aluminum foam sandwich panel (AFSP). A mesoscopic 3D Voronoi model that can describe the structure of closed-cell aluminum foam relatively realistically was established, and a series of numerical simulations using the model of the sandwich panel with a Voronoi foam core were conducted on the plastic forming of two typical doubly curved surfaces including spherical and saddle-shaped surfaces of AFSPs to analyze the deformation behaviors and the forming defects in detail. Multi-point forming experiments of spherical and saddle-shaped AFSPs with different target radii were implemented and the doubly curved panels with good forming quality were obtained. The simulated results of the surface illumination maps, the face sheet profiles, and the maximum strain differences in selected areas of the face sheet and the experimental results indicated that the Voronoi AFSP model can reflect the actual defects occurred in the plastic forming of doubly curved sandwich panels, and the high forming accuracy of the sandwich panel model was also demonstrated in terms of the shape error and the thickness variation.

Dynamic Crushing of All-Metallic Corrugated Panels Filled With Close-Celled Aluminum Foams

2015 ◽  
Vol 82 (1) ◽  
Author(s):  
B. Yu ◽  
B. Han ◽  
C. Y. Ni ◽  
Q. C. Zhang ◽  
C. Q. Chen ◽  
...  
Keyword(s):  
Aluminum Foam ◽  
Sandwich Panel ◽  
Dominant Role ◽  
Sandwich Panels ◽  
Rate Sensitivity ◽  
Aluminum Foams ◽  
Foam Filling ◽  
Plastic Hardening ◽  
Insight Into

Under quasi-static uniaxial compression, inserting aluminum foams into the interstices of a metallic sandwich panel with corrugated core increased significantly both its peak crushing strength and energy absorption per unit mass. This beneficial effect diminished however if the foam relative density was relatively low or the compression velocity became sufficiently high. To provide insight into the varying role of aluminum foam filler with increasing compression velocity, the crushing response and collapse modes of all metallic corrugate-cored sandwich panels filled with close-celled aluminum foams were studied using the method of finite elements (FEs). The constraint that sandwich panels with and without foam filling had the same total weight was enforced. The effects of plastic hardening and strain rate sensitivity of the strut material as well as foam/strut interfacial debonding were quantified. Three collapse modes (quasi-static, transition, and shock modes) were identified, corresponding to different ranges of compression velocity. Strengthening due to foam insertion and inertial stabilization both acted to provide support for the struts against buckling. At relatively low compression velocities, the struts were mainly strengthened by the surrounding foam; at high compression velocities, inertia stabilization played a more dominant role than foam filling.

Effects of aluminum foam filling on the low-velocity impact response of sandwich panels with corrugated cores

2018 ◽  
Vol 22 (4) ◽  
pp. 929-947 ◽  
Author(s):  
LL Yan ◽  
B Yu ◽  
B Han ◽  
QC Zhang ◽  
TJ Lu ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Aluminum Foam ◽  
Sandwich Panel ◽  
Absorption Capacity ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Energy Absorption Capacity ◽  
Core Member ◽  
Foam Filling ◽  
Foam Filled

In this study, a closed-cell aluminum foam was filled into the interspaces of a sandwich panel with corrugated cores to form a composite structure. The novel structure is expected to have enhanced foam-filled cores with high specific strength and energy absorption capacity. An out-of-plane compressive load under low-velocity impact was experimentally and numerically carried out on both the empty and foam-filled sandwich panels as well as on the aluminum foam. It is found that the empty corrugated sandwich panel has poor energy absorption capacity due to the core member buckling compared to that of the aluminum foam. However, by the filling of the aluminum foam, the impact load resistance of the corrugated panel was increased dramatically. The loading-time response of the foam-filled panel performs a plateau region like the aluminum foam, which has been proved to be an excellent energy absorption material. Numerical results demonstrated that the aluminum foam filling can decrease the corrugated core member defects sensitivity and increase its stability dramatically. The plastic energy dissipation of the core member for the foam-filled panel is much higher than that of the empty one due to the reduced buckling wavelength caused by the aluminum foam filling.

Flexural behavior of composite sandwich panel of aluminum foam and epoxy resin

2017 ◽  
Vol 6 (2) ◽  
pp. 276-284
Author(s):  
Shuliang Cheng ◽  
Xuya Zhao ◽  
Xiaoman Liu ◽  
Wei Yu ◽  
Yajun Xin
Keyword(s):  
Epoxy Resin ◽  
Aluminum Foam ◽  
Sandwich Panel ◽  
Flexural Behavior ◽  
Composite Sandwich

Quasi-static localized indentation tests on integrated sandwich panel of aluminum foam and epoxy resin

2015 ◽  
Vol 129 ◽  
pp. 157-164 ◽  
Author(s):  
S.L. Cheng ◽  
X.Y. Zhao ◽  
Y.J. Xin ◽  
S.Y. Du ◽  
H.J. Li
Keyword(s):  
Epoxy Resin ◽  
Aluminum Foam ◽  
Sandwich Panel ◽  
Indentation Tests

scholarly journals Effects of Aluminum Foam Filling on Compressive Strength and Energy Absorption of Metallic Y-Shape Cored Sandwich Panel

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1670
Author(s):  
Leilei Yan ◽  
Pengbo Su ◽  
Yagang Han ◽  
Bin Han
Keyword(s):  
Energy Absorption ◽  
Aluminum Foam ◽  
Sandwich Panel ◽  
Sandwich Structures ◽  
Deformation Mode ◽  
Metallic Foam ◽  
Filling Material ◽  
Specific Strength ◽  
Foam Filling ◽  
Foam Filled

The design of lightweight sandwich structures with high specific strength and energy absorption capability is valuable for weight sensitive applications. A novel all-metallic foam-filled Y-shape cored sandwich panel was designed and fabricated by using aluminum foam as filling material to prevent core member buckling. Experimental and numerical investigation of out-of-plane compressive loading was carried out on aluminum foam-filled Y-shape sandwich panels to study their compressive properties as well as on empty panels for comparison. The results show that due to aluminum foam filling, the specific structural stiffness, strength, and energy absorption of the Y-shape cored sandwich panel increased noticeably. For the foam-filled panel, aluminum foam can supply sufficient lateral support to the corrugated core and vertical leg of the Y-shaped core and causes a much more complicated deformation mode, which cannot occur in the empty panel. The complicated deformation mode leads to an obvious coupling effect, with the stress–strain curve of the foam-filled panel much higher than those of the empty panel and aluminum foam, which were tested separately. Metallic foam filling is an effective method to increase the specific strength and energy absorption of sandwich structures with lattice cores, making it competitive in load carrying and energy absorption applications.

Numerical Simulation on the Compression Property in Different Face Sheet of Sandwich Panel Combined with Aluminum Foam

2018 ◽  
Vol 933 ◽  
pp. 351-356
Author(s):  
Yan Li Wang ◽  
Ke Nan Tian ◽  
Hong Xu ◽  
Lu Cai Wang
Keyword(s):  
Numerical Simulation ◽  
Composite Materials ◽  
Aluminum Foam ◽  
Sandwich Panel ◽  
Face Sheet ◽  
Absorption Properties ◽  
Plateau Stress ◽  
Absorption Energy ◽  
Bottom Face ◽  
Sandwich Sheets

Sandwich face sheets are very important roles in composite materials. It was simulated that the quasi-static compressive crush performances of three types of sandwich sheets by ANSYS/LS-DYNA software. The aluminum top panels (“half hard”) had the higher plateau stress and its absorption energy reached 20.483J/mm3, were superior to the steel top panel (“hard”); the bottom face sheet rarely affects the energy absorption properties in cases.

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