Effect of peer ply and cooling rate on the tensile properties of Al/Gf/PP laminate prepared by hot pressing

Abstract

The glass fiber-reinforced polypropylene/AA2024 hybrid composite (short for Al/Gf/PP laminate) was prepared by hot pressing with anodized 2024-T3 aluminum alloy as the skin and thermoplastic glass fiber-reinforced polypropylene core as a substitute of thermosetting glass fiber-reinforced polymer (based on epoxy) in order to increase the productivity and reduce the production costs during manufacturing procedure. The effect of peel ply (release cloth) and cooling rate on the laminate was investigated elaborately in this work. The orientation of glass fiber is mainly influenced by the peel ply structure, resulting in the resin’s overflow during hot press. Moreover, different cooling rates due to various cooling methods significantly affected both the degree of crystallization of the matrix and deformation of the metal skin during the curing process. Finally, a new peel ply structure was adopted to prevent the fiber from spilling during hot press process, while bubbles were allowed to flow out normally along with partial resin. Finally, a novel cooling method to reduce the degree of polypropylene crystallization and control metal deformation was proposed.

Experimental and numerical research on flexural behavior of fiber metal laminate sandwich composite structures with 3D woven hollow integrated core

“…18 It is called aluminum/glass fiber/polypropylene (Al/Gf/PP) laminate and consists of alternating layers of aluminum alloy 6061-T6 layer and glass fiber-reinforced polypropylene layer. 19 The vacuum resin infusion method and thermal molding process are combined for manufacturing FML sandwich composite structures with a 3D core. First, the face-core bonding property of sandwich composite structures was investigated through the climbing drum peel test.…”

Novel AA7075/AA2124-SiC-17p laminated structures for aerospace applications: A Comparative study into the mechanical performance of PA6 and PA66 composite interlayers

“…3 They also allow to tailor the mechanical behavior of structures through several properties of the constituent layers. 4 Particle reinforced-aluminum matrix composites (PR-AMCs) are well known to have high specific strength and stiffness, 5 improved elevated temperature properties 6 and wear resistance. 7 2xxx series Al alloys, the agehardenable Al-Cu-Mg alloys, are widely chosen as the matrix material because of their excellent fracture toughness and good creep resistance.…”

Evolution Behaviors and Reduction Mechanism of Curing Residual Stresses in GLARE Laminates under a Hot-Pressing Condition

“…Therefore, efficient reduction methods of curing residual stress are always necessary. In recent years, many preparations, forming and processing methods of GLARE have been constantly developed to meet the requirements of different fields: hot pressing, a non-autoclave preparation method, is now often used to manufacture FMLs products [ 14 , 15 ]. Additionally, shot peening, a kind of flexible forming process, is used to realize complex forming of FMLs.…”