Abstract
In recent years, there is a growing interest in joi ning techniques for thermoplastic composites as an alternative to adhes ive bonding. In this manuscript, a fusion bonding process called hot-tool welding is i nvestigated for this purpose and the used material is a carbon fabric reinforced polyphe nylene sulphide. The quality of the welds is experimentally assessed using a short three-point bending setup, which has an interesting distribution of interlaminar shear s tresses. It can be concluded that although the hot-tool welding proces s shows high short-beam strengths, it has some drawbacks. Therefore, a design of an infra red welding setup is presented.
Highlights
An ideal structure would be designed without joints, since joints are potential sources of weakness and additional weight
Adhesive bonding is inherently preferable to mechanical fastening because of the continuous connection, avoiding large stress concentrations induced by each discrete fastener hole
The material used for the experiments was a 5-harness satin-weave carbon fabric-reinforced polyphenylene sulphide (PPS)
Summary
An ideal structure would be designed without joints, since joints are potential sources of weakness and additional weight. The maximum size of a component is generally limited by the manufacturing processes. Demands such as inspection, accessibility, repair and transportation and assembly result in the fact that load-bearing joints cannot be avoided. This fact does not change when designing with fibre-reinforced composites; joints can be drastically reduced, but they will always be a part of a structure. The need for recyclability incites more and more manufacturers to choose materials and bonding systems which allow for recycling, excluding most thermosetting composites and adhesives
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