Bearing Deformation Behavior of Carbon/Bismaleimide Composites Containing One and Two Bolted Joints

Abstract

This paper presents an experimental investigation of the behavior in mechanically fastened composite structures. The experimental work will be presented in two parts: one fastened joint and two fastened joints. For the problem of one fastened joint, the bearing strength and failure process for a double lap bolted joint were characterized. During static tensile testing, the load-displacement response and acoustic emission (AE) were monitored and measured in order to understand the fracture process in joined specimens. Several specimens were unloaded at different loading levels and the damage behavior was observed using soft X-rays and Scanning Electron Microscope (SEM) to assess the damage progress, failure mechanisms, and the relationship with bearing strength. Finally, the ratio of loading proportion was determined by examining the problem of two fastened joints.

Keywords

carbon/bismaleimide composites bearing strength failure mechanism multi-fastened joints loading proportion.

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