Study on the Microstructure and Compression of Composite Metal Foam Core Sandwich Panels

2020 ◽  
Vol 51 (10) ◽  
pp. 5187-5197 ◽  
Author(s):  
Jacob Marx ◽  
Afsaneh Rabiei
Keyword(s):  
Metal Foam ◽  
Sandwich Panels ◽  
Foam Core

Tensile properties of composite metal foam and composite metal foam core sandwich panels

2020 ◽  
pp. 109963622094288
Author(s):  
Jacob Marx ◽  
Afsaneh Rabiei
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Metal Foam ◽  
Failure Strain ◽  
Sandwich Panels ◽  
Metal Foams ◽  
Bond Line ◽  
Upper And Lower Bounds ◽  
Foam Core ◽  
The Face

Steel-steel composite metal foam (SS-CMF) and composite metal foam core sandwich panels (SS-CMF-CSP) were manufactured and tested under quasi-static tension. The SS-CMF-CSP were manufactured by attaching stainless steel face sheets to a SS-CMF core using solid-state diffusion bonding. SEM imaging was used to inspect the microstructure of SS-CMF and compare it to that of SS-CMF-CSP. The results indicate a cohesive bond line at the interface of the core and the face sheets. The bare SS-CMF samples had an ultimate tensile strength between 75–85 MPa and a failure strain between 7.5–8%. The normalized tensile strength of the SS-CMF was approximately 24 MPa/(g/cm3), 410% higher than other comparable metal foams, with a specific energy absorption of 0.95 J/g under tension. The uniform porosities and strong bonding between the sphere wall and matrix seem to be the strengthening factor of SS-CMF under tension when compared to other metal foams. The ultimate tensile strength of the SS-CMF-CSP was 115% stronger than the bare SS-CMF at 165 MPa with an average failure strain of 23%. The normalized strength of the SS-CMF-CSP was 52% higher than the bare SS-CMF. The modulus of elasticity was approximated using the rule of mixtures for the SS-CMF and the SS-CMF-CSP and the experimental results were found to lie within the calculated upper and lower bounds.

Laser Forming of Metal Foam Sandwich Panels: Effect of Panel Manufacturing Method

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Tizian Bucher ◽  
Min Zhang ◽  
Chang Jun Chen ◽  
Ravi Verma ◽  
Wayne Li ◽  
...  
Keyword(s):  
Metal Foam ◽  
Numerical Models ◽  
Sandwich Panels ◽  
Weight Ratio ◽  
Industrial Applications ◽  
Laser Forming ◽  
Process Conditions ◽  
Foam Core ◽  
Wide Range ◽  
The Impact

Sandwich panels with metal foam cores have a tremendous potential in various industrial applications due to their outstanding strength-to-weight ratio, stiffness, and shock absorption capacity. A recent study paved the road toward a more economical implementation of sandwich panels, by showing that the material can be successfully bent up to large angles using laser forming. The study also developed a fundamental understanding of the underlying bending mechanisms and established accurate numerical models. In this study, these efforts were carried further, and the impact of the foam core structure, the facesheet and foam core compositions, and the adhesion method on the bending efficiency and the bending limit was investigated. These factors were studied individually and collectively by comparing two fundamentally different sandwich panel types. Thermally induced stresses at the facesheet/core interface were thoroughly considered. Numerical modeling was carried out under different levels of geometric accuracy to complement bending experiments under a wide range of process conditions. Interactions between panel properties and process conditions were demonstrated and discussed.

Analytical and numerical investigations on the penetration of rigid projectiles into the foam core sandwich panels with aluminum face-sheets

2017 ◽  
Vol 233 (1) ◽  
pp. 285-298
Author(s):  
A Alavi Nia ◽  
M Kazemi
Keyword(s):  
Analytical Method ◽  
High Speed ◽  
Aluminum Foam ◽  
Metal Foam ◽  
Sandwich Panels ◽  
Foam Core ◽  
Polymer Foam ◽  
High Speed Impact ◽  
Mathematical Equations ◽  
Density Ratios

The aim of this study was to evaluate the penetration of ballistic projectiles into the sandwich panels both analytically and numerically. Due to the complexity of the mathematical equations governing this phenomenon, very few analytical studies have been conducted in this area. Given the widespread use of sandwich panels consisting of metal face-sheets and metal foam core in aerospace industries, revisions are carried out on analytical method provided by Hoo Fatt et al. on polymer foam core and composite face-sheets sandwich panels. Then using the improved relations, the high speed impact of a cylindrical projectile on the sandwich panels with aluminum face-sheets and aluminum foam core with different density ratios has been discussed. Also, the penetration process is simulated and finally to evaluate the accuracy of the improved analytical method and simulations, the results are compared to the experimental data obtained from tests have been done on the panels with aluminum foam core and aluminum face-sheets. Results of the research show that the improved procedure and numerical simulations are in good agreement with the experiments.

scholarly journals Investigating the Effect of Low Speed Impact on Sandwich Panel with Metal Foam Core (Comparing the Results of MATLAB and Abacus Analysis)

2020 ◽  
Vol 6 (5) ◽  
pp. 45-52
Author(s):  
Hamed Farhadi Nai
Keyword(s):  
Analytical Modeling ◽  
Sandwich Panel ◽  
Metal Foam ◽  
Equations Of Motion ◽  
Sandwich Panels ◽  
Foam Core ◽  
Spring Stiffness ◽  
Mass Model ◽  
Low Speed ◽  
Three Samples

In this paper, analytical modeling and numerical simulation of sandwich panel behavior with metal foam core under low impact impact are presented and how the formation and development of impact defects in impact loading conditions in three samples with different face sizes Taken, checked. Multi-layer sandwich panels are made of epoxy carbon and the core is also made of metal foam. Analytical modeling of low speed shock load on sandwich panels, using mass model and two-degree free spring, has been used to calculate the contact force. The spring stiffness of the contact site, and the bending and shear spring stiffness of the sandwich panel are calculated, the values of which change over time. To solve the equations of motion, the exact solution method has been used and the radius of the affected area is calculated using energy equations. In the next section, simulation of low speed impact on sandwich panels with metal foam core is done in three samples of different sizes in Abacus software, so that we see how to create and develop defects in sandwich panels. In the next section, we have examined the results and compared the numerical solution and analytical simulation, which confirms the process of research and this has been proven to be important.

Laser Forming of Metal Foam Sandwich Panels: Effect of Panel Manufacturing Method

2019 ◽  
Author(s):  
Tizian Bucher ◽  
Min Zhang ◽  
Chang Jun Chen ◽  
Ravi Verma ◽  
Wayne Li ◽  
...  
Keyword(s):  
Metal Foam ◽  
Numerical Models ◽  
Sandwich Panels ◽  
Weight Ratio ◽  
Industrial Applications ◽  
Laser Forming ◽  
Process Conditions ◽  
Foam Core ◽  
Wide Range ◽  
The Impact

Abstract Sandwich panels with metal foam cores have a tremendous potential in various industrial applications due to their outstanding strength-to-weight ratio, stiffness, and shock absorption capacity. A recent study paved the road towards a more economical implementation of sandwich panels, by showing that the material can be successfully bent up to large angles using laser forming. The study also developed a fundamental understanding of the underlying bending mechanisms and established accurate numerical models. In this study, these efforts were carried further, and the impact of the foam core structure, the facesheet and foam core compositions, as well as the adhesion method on the bending efficiency and bending limit was investigated. These factors were studied individually and collectively by comparing two fundamentally different sandwich panel types. Thermally-induced stresses at the facesheet/core interface were thoroughly considered. Numerical modeling was carried out under different levels of geometric accuracy, to complement bending experiments under a wide range of process conditions. Interactions between panel properties and process conditions were demonstrated and discussed.

A Study on Puncture Resistance of Composite Metal Foam Core Sandwich Panels

2020 ◽  
Vol 22 (12) ◽  
pp. 2000693 ◽  
Author(s):  
Afsaneh Rabiei ◽  
Marc Portanova ◽  
Jacob Marx ◽  
Christopher Scott ◽  
Jerod Schwandt
Keyword(s):  
Metal Foam ◽  
Sandwich Panels ◽  
Foam Core ◽  
Puncture Resistance

scholarly journals Laser Forming of Sandwich Panels With Metal Foam Cores

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Tizian Bucher ◽  
Steven Cardenas ◽  
Ravi Verma ◽  
Wayne Li ◽  
Y. Lawrence Yao
Keyword(s):  
Power Plants ◽  
Metal Foam ◽  
Sandwich Panels ◽  
Laser Forming ◽  
Process Conditions ◽  
Foam Core ◽  
Mechanism Analysis ◽  
Forming Process ◽  
Solar Power Plants ◽  
The Impact

Over the past decade, laser forming has been effectively used to bend various metal foams, opening the possibility of applying these unique materials in new engineering applications. The purpose of the study was to extend laser forming to bend sandwich panels consisting of metallic facesheets joined to a metal foam core. Metal foam sandwich panels combine the excellent shock-absorption properties and low weight of metal foam with the wear resistance and strength of metallic facesheets, making them desirable for many applications in fields such as aerospace, the automotive industry, and solar power plants. To better understand the bending behavior of metal foam sandwich panels, as well as the impact of laser forming on the material properties, the fundamental mechanisms that govern bending deformation during laser forming were analyzed. It was found that the well-established bending mechanisms that separately govern solid metal and metal foam laser forming still apply to sandwich panel laser forming. However, two mechanisms operate in tandem, and a separate mechanism is responsible for the deformation of the solid facesheet and the foam core. From the bending mechanism analysis, it was concluded on the maximum achievable bending angle and the overall efficiency of the laser forming process at different process conditions. Throughout the analysis, experimental results were complemented by numerical simulations that were obtained using two finite element models that followed different geometrical approaches.

Sign in / Sign up

Export Citation Format

Share Document