Quade Derek, Jana Sadhan, Morscher Gregory, Kannan Manigandan, McCorkle Linda
Glenn Research Center, Cleveland, Ohio.
University of Akron, Akron, Ohio.
Compos Part A Appl Sci Manuf. 2018 Aug 24;114:269-277. doi: 10.1016/j.compositesa.2018.08.019.
Tensile tests of Nickel-titanium (NiTi) shape memory alloys (SMA) embedded within carbon fiber reinforced polymer matrix composite (CFRP/PMC) laminates were evaluated with simultaneous monitoring of modal acoustic emissions (MAE). Three different layup configurations utilizing two different thin film adhesives were applied to bond the materials. Ultimate tensile strengths, strains, and moduli were obtained along with cumulative AE energy of events and specimen failure location. Scanning electron microscopy was used to examine the break areas of the specimens post-test. Microscopy was used to validate failure locations revealed from MAE analysis. 90° plies in the outer ply gave the strongest acoustic signals as well as the cleanest fracture of the specimens tested. Overlapping 0° ply layers surrounding the SMA was found to be the best scenario to prevent failure of the specimen itself.
对嵌入碳纤维增强聚合物基复合材料（CFRP/PMC）层压板中的镍钛（NiTi）形状记忆合金（SMA）进行拉伸试验，并同时监测模态声发射（MAE）。使用两种不同的薄膜粘合剂采用三种不同的铺层配置来粘结材料。获得了极限抗拉强度、应变和模量，以及事件的累积声发射能量和试样失效位置。试验后使用扫描电子显微镜检查试样的断裂区域。使用显微镜来验证从声发射分析中揭示的失效位置。外层的90°铺层产生了最强的声信号，并且测试的试样断裂最干净。发现在形状记忆合金周围重叠0°铺层是防止试样本身失效的最佳方案。
