Quade Derek J, Jana Sadhan C, Morscher Gregory N, Kanaan Manigandan, McCorkle Linda
The University of Akron.
NASA Glenn Research Center.
Mech Mater. 2019 Apr;131:22-32. doi: 10.1016/j.mechmat.2019.01.002. Epub 2019 Jan 4.
A single sheet of nickel-titanium (NiTi) shape memory alloy (SMA) was introduced within an IM7/8552 polymer matrix composite (PMC) panel in conjunction with multiple thin film adhesives to promote the interfacial bond strength between the SMA and PMC. End notched flexure (ENF) testing was performed in accordance to ASTM D7905 method for evaluation of mode II interlaminar fracture toughness (G) of unidirectional fiber-reinforced polymer matrix composites. Acoustic emissions (AE) were monitored during testing with two acoustic sensors attached to the specimens. The composite panels examined using scanning electron microscopy techniques after part failure. G values for the control composite samples were found to be higher than those of samples with embedded SMA sheets. The presence of adhesives bonded to SMA sheets further diminished the G values. AE values revealed poor bonding of the panels, with little to no signals during testing.
将一片镍钛（NiTi）形状记忆合金（SMA）与多种薄膜粘合剂一起引入IM7/8552聚合物基复合材料（PMC）面板中，以提高SMA与PMC之间的界面结合强度。根据ASTM D7905方法进行端部切口弯曲（ENF）测试，以评估单向纤维增强聚合物基复合材料的II型层间断裂韧性（G）。在测试过程中，使用两个附着在试样上的声学传感器监测声发射（AE）。部件失效后，使用扫描电子显微镜技术检查复合面板。发现对照复合样品的G值高于嵌入SMA片材的样品。与SMA片材粘结的粘合剂的存在进一步降低了G值。AE值表明面板粘结不良，测试期间几乎没有信号。
