Acoustic emission analysis for characterisation of damage mechanisms in fibre reinforced thermosetting polyurethane and epoxy (Reprinted from Composites Part B, vol 56, pg 477)

作者：Kempf M^*; Skrabala O; Altstaedt V

来源：Composites Part B: Engineering , 2014, 65: 117-123.

DOI：10.1016/j.compositesb.2014.05.003

• Acoustic emission
• Mechanical testing
• Fatigue
• Polymer-matrix composites (PMCs)
• Thermosetting polyurethane

Acoustic emission analysis is used to investigate microscopic damage mechanisms and damage progress in unidirectional glass and carbon fibre reinforced composites. Under static loading the influence of fibre orientation on damage initiation and propagation is determined. A novel polyurethane matrix system significantly enhances material performance in terms of crack initiation load levels, crack growth, damage tolerance and off-axis tensile strength. Hysteresis measurements during stepwise increasing dynamic load tests highlight the effect of fibre-matrix-adhesion and resin fracture toughness in unidirectional 0 degrees fibre reinforced composites. Acoustic detection of beginning fibre breakage correlates with a significant increase of loss work per cycle.

• 出版日期2014-10