Minimum invasive production-related SLS specimen manufacturing for interface characterization of hybrid materials made by RTM

Abstract

This work shows a new way of single lap shear specimen production for hybrid metal-composite materials, which can be used to characterize process-induced interface property variations. Due to this special procedure, the specimen manufacturing can be done production-related and with a homogenization of the thermal stresses occurring in the joint area of the hybrid at each specimen. The exemption process of the specimen is kept in a minimum invasive way, not affecting the interface in the tested zone. The influence of the metal surface structure specifically created by micro form milling as well as the influence of the curing temperature on the maximum shear strength of the interface, were investigated. Finally, the driving failure mechanisms were identified and described.

Influence of Laser Treatment on End Notched Flexure Bonded Joints in Carbon Fiber Reinforced Polymer: Experimental and Numerical Results

“…Since it is not necessary to drill the parts, the use of structural adhesives is indicated in the case of assembly of components in polymeric composite materials, reducing weight, avoiding the presence of corrosive problems, allowing to dampen the vibrations, and, consequently, the reduction of vibroacoustic activity [1][2][3][4]. The reliability of a bonded joint is closely related to the chemical compatibility between the substrates, the nature of the adhesive and adherends, the geometric configuration of the joint, the working conditions, and, in particular, the pre-treatment of the surfaces to be bonded, as shown in many works in the literature [5][6][7][8][9][10].…”

Flow-speed-controlled quality optimisation for one-shot-hybrid RTM parts

“…Comparable to a classic gluing step, the surface constitution of the metal component has a big influence on the final interface strength. The maximum transferable load can be improved by mechanical structuring [16][17][18], chemical etching [19] or electrical discharge treatment [20] of the metal surface. At least one of these methods should be applied to reach a sufficient interface quality towards the metal constituent.…”