Basic Formability Research and Experimental Test of Glass Fiber Reinforced Aluminium Laminates

Abstract

The basic formability of Glare 2A, Glare 2B and Glare 3 laminates was investigated by unidirectional tensile and three-point bending tests to explore the formability characteristics of Glare. Meanwhile, the failure characteristic of Glare was studied by scanning electron microscopy (SEM). The results indicate that the direction of the fiber has strong effects on the formability of Glare. The Glare 2A laminates exhibit the strongest resistance to plastic deformation. Meanwhile, it is also hard to deform in thickness direction.σ=σy+Kεn is used to fit the real stress-strain curves of three variants and proves the most suitable model, presenting the maximum correlation coefficient. Furthermore, Glare 2A laminates exhibit the most serious bending springback. Shrinkage and compression fracture are visible in the inner layer which bears compressive stress, and fiber fracture and delamination are found in the outer layer which bears tensile stress. On the contrary, Glare 2B laminates show the minimum springback, following with the observed fiber-matrix cracks. Finally, the accuracy of test results is verified by roll bending.

Keywords

• composite
• Glare laminates
• basic formability
• hardening model
• springback