Abstract
AbstractDamage processes in glass fiber reinforced plastic composites have been examined extensively by many analytical and experimental methods, including acoustic emission. While damage phenomena in mezo- and macro-scale are well described, the subtle mechanisms in micro-scale are still under discussion. The goal of this work was to apply the acoustic emission to examine damage initiation in fiber reinforced epoxy resin composites with different continuous glass-fiber architectures. Basic lay-ups were used: unidirectional, cross-ply and angle-ply, each with varying fiber volume content in epoxy matrix. Detection of fine micro-cracks was possible owing to merging the mechanical monotonic and step-load tests in 4-point bending with acoustic emission monitoring and detailed scanning electron microscopy observations. Clear images of macroscopically undamaged samples after interruption of step-loading cycles revealed the initiation of micro-cracks by debonding of fiber-matrix interfaces, in agreement with acoustic emission signal analyses, featuring use of historic index and rise time/amplitude ratio.
Publisher
Springer Science and Business Media LLC
Subject
Mechanical Engineering,Mechanics of Materials
Reference34 articles.
1. Kelly, A., Zweben, C. (eds.): Comprehensive Composites. Elsevier, Oxford (2001)
2. Kempf, M., Skrabala, O., Altstadt, V.: Acoustic emission analysis for characterisation of damage mechanisms in fiber reinforced thermosetting polyurethane and epoxy. Compos. Part B 56, 477–483 (2014)
3. Lomov, S.V., Ivanov, D.S., Truong, T.C., Verpoest, I., Baudry, F., Bosche, K.V., Xie, H.: Experimental methodology of study of damage initiation and development in textile composites in uniaxial tensile test. Compos. Sci. Technol. 68(12), 2340–2349 (2008)
4. Gorman, M.R.: Acoustic emission in structural health monitoring (SHM). In: Boller, C., et al. (eds.) Encyclopedia of Structural Health Monitoring, pp. 79–100. Wiley, New York (2009)
5. Aggelis, D.G., Barkoula, N.M., Matikas, T.E., Paipetis, A.S.: Acoustic structural health monitoring of composites: damage identification and evaluation in cross ply laminates using acoustic emission and ultrasonics. Compos. Sci. Technol. 72(10), 1127–1133 (2012)
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献