An investigation on blunt notch behavior of fiber metal laminates containing notch with different shapes

2013 ◽  
Vol 32 (15) ◽  
pp. 1143-1152 ◽  
Author(s):  
Ebrahim Sadeghpour ◽  
Mojtaba Sadighi ◽  
Soheil Dariushi
Keyword(s):  
Fiber Metal Laminates ◽  
Blunt Notch ◽  
Different Shapes ◽  
Fiber Metal

Blunt notch strength of hybrid boron/glass/aluminum fiber metal laminates

2011 ◽  
Vol 528 (4-5) ◽  
pp. 2164-2173 ◽  
Author(s):  
Po-Ching Yeh ◽  
Po-Yu Chang ◽  
Jenn-Ming Yang ◽  
Peter H. Wu ◽  
Ming C. Liu
Keyword(s):  
Fiber Metal Laminates ◽  
Blunt Notch ◽  
Fiber Metal ◽  
Notch Strength ◽  
Aluminum Fiber

Residual Stresses in Intrinsic UD-CFRP-Steel-Laminates - Experimental Determination, Identification of Sources, Effects and Modification Approaches

2015 ◽  
Vol 825-826 ◽  
pp. 369-376 ◽  
Author(s):  
Robert Prussak ◽  
Daniel Stefaniak ◽  
Christian Hühne ◽  
Michael Sinapius
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Tensile Strength ◽  
Epoxy Composite ◽  
Thermal Residual Stress ◽  
Fiber Metal Laminates ◽  
Fiber Metal ◽  
Impact Energies ◽  
The Impact ◽  
Specific Impact

This paper focuses on the reduction of process-related thermal residual stress in fiber metal laminates and its impact on the mechanical properties. Different modifications during fabrication of co-cure bonded steel/carbon epoxy composite hybrid structures were investigated. Specific examinations are conducted on UD-CFRP-Steel specimens, modifying temperature, pressure or using a thermal expansion clamp during manufacturing. The impact of these parameters is then measured on the deflection of asymmetrical specimens or due yield-strength measurements of symmetrical specimens. The tensile strength is recorded to investigate the effect of thermal residual stress on the mechanical properties. Impact tests are performed to determine the influence on resulting damage areas at specific impact energies. The experiments revealed that the investigated modifications during processing of UD-CFRP-Steel specimens can significantly lower the thermal residual stress and thereby improve the tensile strength.

scholarly journals The Synergistic Effect of Temperature and Loading Rate on Deformation for Thermoplastic Fiber Metal Laminates

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4210
Author(s):  
Kai Jin ◽  
Shanyong Xuan ◽  
Jie Tao ◽  
Yujie Chen
Keyword(s):  
Melting Point ◽  
Softening Point ◽  
Bending Strength ◽  
Loading Rate ◽  
Synergistic Effects ◽  
Effect Of Temperature ◽  
Resin Matrix ◽  
Tension Stress ◽  
Fiber Metal Laminates ◽  
Fiber Metal

The glass fiber reinforced polypropylene/AA2024 hybrid laminates (short for Al/Gf/PP laminates) as structural materials were prepared and formed by hot pressing. The synergistic effects of temperature and loading speed on the laminate deformation under tensile and bending conditions were investigated and analyzed in this study. In tension, stress–strain curves presented bimodal types effected by tensile rates and temperatures. The state of PP resin determines the mechanical behavior of the FMLs. The tensile rate has no effect on FML deformation without heating or over the melting point of PP resin (about 170 °C). The softening point of PP resin (about 100 °C) is characteristic temperature. When the temperature exceeds the softening point but does not reach the melting point, the tensile strength and elongation will demonstrate coordinated growth at a relatively high tensile speed. The efficiency of fiber bridging is affected significantly since the resin is the medium that transfers load from the metal to the fiber. Under bending, the curves presented a waterfall decrement with temperature increment. The softening point of resin matrix is the key in a bending process. When the temperature is near the softening point, deformation is sensitive to both the temperature and the loading speed to a certain extent. If temperature is lower than softening point, deformation is mainly guided by temperature. If the temperature is beyond the softening point, loading speed is in a leading position of deformation. The bending strength gradually increases with loading rate. By using these deformation characteristics, the deformation of the thermoplastic laminates can be controlled in stamping or other plastic forming processes for thermoplastic fiber metal laminates.

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