Nasreen Adeela, Bangash Muhammad Kashif, Shaker Khubab, Nawab Yasir
National Center for Composite Materials, School of Engineering and Technology, National Textile University, Faisalabad 37610, Pakistan.
Polymers (Basel). 2023 Jan 13;15(2):435. doi: 10.3390/polym15020435.
In aerospace and automotive applications, composite materials are used as a major structural material along with metals. Composite-metal and metal-metal joining are very crucial in such structures. Adhesive bonding is commonly used for this purpose. Since such structures are exposed to varying temperatures and dynamic loads, it is essential to investigate the response of such joints under thermomechanical loading. Though various studies have been reported in the literature to assess the thermomechanical properties of composites, adhesives, and their joints, the effect of the surface treatment of metals and composites on the improvement in the thermomechanical behavior of the joints has not been reported. The metal and composite surfaces were modified using chemical etching techniques. The interaction between adhesives and adherends was studied using the DTMA technique in compression mode. Anodizing treatment on aluminum alloys improved the stiffness properties of metallic joints to 36% and decreased the damping to 23%, while chemical treatment on composite and metal adherends increased the stiffness of composite-metal joints to 34% and reduced the energy dissipation to 20%.
在航空航天和汽车应用中，复合材料与金属一起被用作主要结构材料。复合-金属和金属-金属连接在这类结构中非常关键。为此通常采用粘接。由于这类结构会受到不同温度和动态载荷的作用，研究此类接头在热机械载荷下的响应至关重要。尽管文献中已报道了各种评估复合材料、胶粘剂及其接头热机械性能的研究，但金属和复合材料的表面处理对改善接头热机械行为的影响尚未见报道。采用化学蚀刻技术对金属和复合材料表面进行了改性。在压缩模式下使用动态热机械分析（DTMA）技术研究了胶粘剂与被粘物之间的相互作用。铝合金的阳极氧化处理使金属接头的刚度性能提高了36%，阻尼降低了23%，而复合材料和金属被粘物的化学处理使复合-金属接头的刚度提高了34%，能量耗散降低了20%。
