Aggelis D G, Barkoula N M, Matikas T E, Paipetis A S
Department of Materials Science and Engineering, University of Ioannina, Ioannina 45110, Greece.
J Acoust Soc Am. 2010 Jun;127(6):EL246-51. doi: 10.1121/1.3425752.
The scope of this study is to relate the acoustic activity of damage in composites to the failure mechanisms associated with these materials. Cross ply fiber reinforced composites were subjected to tensile loading with recording of their acoustic activity. Acoustic emission (AE) parameters were employed to monitor the transition of the damage mechanism from transverse cracking (mode I) to delamination (mode II). Wave propagation measurements in between loading steps revealed an increase in the relative amplitude of the propagated wave, which was attributed to the development of delamination that confined the wave to the top longitudinal plies of the composite.
本研究的范围是将复合材料中损伤的声学活动与这些材料相关的失效机制联系起来。对正交铺层纤维增强复合材料进行拉伸加载，并记录其声学活动。采用声发射（AE）参数来监测损伤机制从横向开裂（模式I）到分层（模式II）的转变。加载步骤之间的波传播测量显示，传播波的相对振幅增加，这归因于分层的发展，分层将波限制在复合材料的顶部纵向铺层中。
