scholarly journals The Plastic Behavior in the Large Deflection Response of Fiber Metal Laminate Sandwich Beams under Transverse Loading

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 439
Author(s):  
Mingshi Wang ◽  
Jianxun Zhang ◽  
Hui Yuan ◽  
Haoyuan Guo ◽  
Wenbo Zhuang
Keyword(s):  
Large Deflection ◽  
Volume Fraction ◽  
Composite Layer ◽  
Plastic Behavior ◽  
Sandwich Beams ◽  
Transverse Loading ◽  
Fiber Metal Laminate ◽  
Metal Volume ◽  
Fiber Metal ◽  
Metal Volume Fraction

The plastic behavior in the large deflection response of slender sandwich beams with fiber metal laminate (FML) face sheets and a metal foam core under transverse loading is studied. According to a modified rigid–perfectly plastic material approximation, an analytical model is developed, and simple formulae are obtained for the large deflection response of fully clamped FML sandwich beams, considering the interaction of bending and stretching. Finite element (FE) calculations are conducted, and analytical predictions capture numerical results reasonably in the plastic stage of large deflection. The influences of metal volume fraction, strength ratio of metal to composite layer, core strength, and punch size on the plastic behavior in the large deflection response of FML sandwich beams are discussed. It is suggested that, if the structural behavior of fiber-metal laminate sandwich beams is plasticity dominated, it is similar to that of metal sandwich beams. Moreover, both metal volume fraction and the strength ratio of metal to composite layer are found to be important for the plastic behavior in the large deflection response of fiber metal laminate sandwich beams, while core strength and punch size might have little influence on it.

Investigation on the effect of configuration on tensile and flexural properties of aluminum/self-reinforced polypropylene fiber metal laminates

2018 ◽  
Vol 22 (6) ◽  
pp. 1770-1785
Author(s):  
Lei Pan ◽  
Yifan Wang ◽  
Yubing Hu ◽  
Yunfei Lv ◽  
Aamir Ali ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Polypropylene Fiber ◽  
Tensile Failure ◽  
Flexural Properties ◽  
Metal Composite ◽  
Fiber Metal Laminates ◽  
Metal Volume ◽  
Fiber Metal ◽  
Flexural Tests ◽  
Metal Volume Fraction

Tensile and flexural properties of aluminum/self-reinforced polypropylene fiber metal laminates (Al/SRPP FMLs) based on 2/1 and 3/2 configurations are investigated in this paper. The Al/SRPP FMLs based on 2/1 configuration exhibit better performance than the Al/SRPP FMLs based on 3/2 configuration in terms of tensile and flexural properties. The metal volume fraction plays an important role in the tensile strength and flexural strength in both Al/SRPP-2/1 FMLs and Al/SRPP-3/2 FMLs. The tensile stress–strain curves of Al/SRPP-2/1FMLs and Al/SRPP-3/2FMLs decline while the ductility of both FMLs enhances as the temperature increases. The elevated temperature intensifies the delamination of the Al/SRPP FMLs, especially for Al/SRPP-3/2FMLs because of possible more manufacture defects. The outer metal cracking and inter-laminar delamination are the main tensile failure mechanisms. However, delamination at the metal/composite interface and breakage of the constituent materials does not occur after the flexural tests.

Specimen Thickness and Impactor Mass Effects on Drop-Weight Impact Studies of GLARE 5 Fiber-Metal Laminates

2011 ◽  
Author(s):  
A. Seyed Yaghoubi ◽  
B. Liaw
Keyword(s):  
Impact Velocity ◽  
Volume Fraction ◽  
Energy Condition ◽  
Specimen Thickness ◽  
Fiber Metal Laminates ◽  
Drop Weight ◽  
Metal Volume ◽  
Fiber Metal ◽  
The Impact ◽  
Metal Volume Fraction

Impact responses and damage induced by a drop-weight instrument on GLARE 5 fiber-metal laminates (FMLs) with different thicknesses were studied. The effect of impactor mass was also considered. The damage characteristics were evaluated using both nondestructive ultrasonic and mechanical sectioning techniques. The ultrasonic C-scan technique could only assess the contour of entire damage area whereas more details of damage were obtained using the mechanical cross-sectioning technique. As expected, thicker GLARE 5 FMLs offered higher impact resistance. When subjected to the same impact energy, the entire damage contour enlarged as the specimen became thicker. Under the same impact condition, by reducing the impactor mass, the contact force escalated while the contact stiffness increased. Experimental results showed that the threshold cracking energy varied parabolically with respect to the impact velocity, metal volume fraction (MVF) and the specimen thickness. By increasing the metal volume fraction of the panels, the threshold cracking energy decreased parabolically. On the other hand, for the same MVF value, the cracking energy increased as the impactor mass increased. By increasing the panel thickness, the threshold cracking energy condition increased parabolically; whereas under the same impact velocity, the threshold cracking energy increased by increasing the impactor mass.

Pilot study of metal volume fraction approach for fiber/metal laminates

1995 ◽  
Vol 32 (3) ◽  
pp. 663-671 ◽  
Author(s):  
H. F. Wu ◽  
L. L. Wu ◽  
W. J. Slagter ◽  
J. L. Verolme
Keyword(s):  
Pilot Study ◽  
Volume Fraction ◽  
Fiber Metal Laminates ◽  
Metal Volume ◽  
Fiber Metal ◽  
Metal Volume Fraction

Experimental-theoretical predictions of stress–strain curves of Glare fiber metal laminates

2017 ◽  
Vol 52 (1) ◽  
pp. 109-121 ◽  
Author(s):  
Hale Ergun ◽  
Benjamin M Liaw ◽  
Feridun Delale
Keyword(s):  
Volume Fraction ◽  
Tensile Tests ◽  
In Situ Stress ◽  
Fiber Metal Laminates ◽  
Stress Strain ◽  
Empirical Parameter ◽  
Metal Volume ◽  
Fiber Metal ◽  
Metal Volume Fraction ◽  
Fraction Method

Monotonic tensile tests are conducted on seven different Glare grades of fiber metal laminates. In-situ stress–strain curves of glass/epoxy laminate interleaved in Glare 2(3/2) are exposed with the application of metal volume fraction method using the stress–strain curves of Glare 2(3/2) and Aluminum 2024-T3 in unidirectional and transverse directions. The strain–stress curves of cross-ply Glares are predicted by the modification of this method with an empirical parameter and a second parameter considering the relative glass/epoxy laminate thickness ratios of Glare grades. Modified metal volume fraction method presented in this study can be used as a preliminary estimation of stress–strain curves of multiple possible fiber metal laminate configurations without testing.

Scaling of Complex Conductivity for A Percolating Metal-Insulator Composite with Inter granular Tunneling Above and Below the Superconducting Transition

1995 ◽  
Vol 411 ◽  
Author(s):  
D. S. Mclachlan ◽  
A. B. Pakhomov ◽  
I. I. Oblachova ◽  
F. Brouers ◽  
A. Sarychev
Keyword(s):  
Volume Fraction ◽  
Frequency Dispersion ◽  
Scaling Theory ◽  
Complex Conductivity ◽  
Superconducting Transition ◽  
Percolation Transition ◽  
Metal Insulator ◽  
Metal Volume ◽  
Metal Volume Fraction ◽  
Composite Samples

ABSTRACTThe complex conductivity was measured on 3d granular NbC-KCI composite samples at varying metal volume fraction p, frequency ω and temperature above and below the superconductivity critical Tc. The observed frequency dispersion is anomalous in that it is not in accord with the scaling theory of percolation transition. The results are compared with a recently developed scaling theory, which takes both intercluster tunneling and intercluster capacitance into account. The experimental estimates for the new critical exponents are in reasonable agreement with the theory. The very low value of the crossover frequency can also be understood. We also present the data showing the dispersion of the complex conductivity well below the superconducting transition Tc of NbC.

Development of beam modal function for free vibration analysis of FML circular cylindrical shells

2017 ◽  
Vol 24 (14) ◽  
pp. 3026-3035 ◽  
Author(s):  
Masood Mohandes ◽  
Ahmad Reza Ghasemi ◽  
Mohsen Irani-Rahagi ◽  
Keivan Torabi ◽  
Fathollah Taheri-Behrooz
Keyword(s):  
Free Vibration ◽  
Shell Theory ◽  
Volume Fraction ◽  
Equations Of Motion ◽  
Cylindrical Shells ◽  
Free Vibration Analysis ◽  
Governing Equations ◽  
Fiber Metal Laminate ◽  
Circular Cylindrical Shells ◽  
Fiber Metal

The free vibration of fiber–metal laminate (FML) thin circular cylindrical shells with different boundary conditions has been studied in this research. Strain–displacement relations have been obtained according to Love’s first approximation shell theory. To satisfy the governing equations of motion, a beam modal function model has been used. The effects of different FML parameters such as material properties lay-up, volume fraction of metal, fiber orientation, and axial and circumferential wavenumbers on the vibration of the shell have been studied. The frequencies of shells have been calculated for carbon/epoxy and glass/epoxy as composites and for aluminum as metal. The results demonstrate that the influences of FML lay-up and volume fraction of composite on the frequencies of the shell are remarkable.

Simulation of Stiffness and Thermal Conductivity of Ordered Metal Microstructure Reinforced Polymer Composite Interposer

2013 ◽  
Vol 663 ◽  
pp. 326-330 ◽  
Author(s):  
Ming Wang ◽  
Ping Cheng ◽  
Yan Wang ◽  
Hong Wang ◽  
Gui Fu Ding
Keyword(s):  
Thermal Conductivity ◽  
Polymer Composite ◽  
Volume Fraction ◽  
Pure Polymer ◽  
Reinforced Polymer ◽  
Metal Volume ◽  
The One ◽  
Metal Microstructure ◽  
Triangular Model ◽  
Metal Volume Fraction

An interposer model based on ordered metal microstructure reinforced polymer composite was established using ANSYS software. The shape of metal microstructure includes quadrilateral, hexagon and triangle. The stiffness and thermal conductivity of composite interposer was calculated and discussed. Simulation results show that the stiffness of the metal microstructure-reinforced polymer composite interposer increases with augmenting the volume fraction of metal compared with the pure polymer. For the composite with metal volume fraction of 65%, the stiffness of the triangular composite interposer is 3.12 times that of the pure polymer interposer. The thermal conductivity of the hexagonal model is the best, while the one of quadrilateral and triangular model is similar. For the composite with the metal volume fraction of 65%, the thermal conductivity of the triangular composite interposer is 3.42 times that of the pure polymer interposer. Therefore, metal microstructure can effectively improve the performance of the pure polymer interposer.

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