摘要
碳纤维复合材料具有超高的强度和刚度,在工业领域应用广泛。钢与碳纤维复合材料的搭接形式是提升搭接接头强度的关键。本文提出了一种新型搭接结构:钢带等间距开孔,碳纤维布S形编织,并在钢带与碳纤维间布胶,形成胶-编混合搭接。对胶-编混合搭接接头和胶黏搭接接头进行了破坏试验,研究结果表明,引入编织工艺的接头改变了钢-胶层界面的应力状态,与胶黏搭接接头相比,胶-编混合搭接接头单位厚度峰值强度平均提高了25%,破坏形式从单一的钢-胶层界面完全脱黏破坏转变为钢-胶层界面完全脱黏、钢-胶层界面部分脱黏、碳纤维(损伤)断裂、编织条滑移和钢板翘曲等多种破坏模式的耦合破坏。进一步研究了开孔数量和编织宽度对胶-编混合搭接接头强度的影响。结果表明:随着开孔数量的增加,搭接接头强度先增加后减小;随着编织宽度的增加,搭接接头强度相应增加,但强度增幅先快后慢。25 mm编织宽度的双孔结构试样强度最高,10 mm编织宽度的四孔结构试样强度最低,最高强度比最低强度提升了106.38%。
Carbon fiber reinforced plastics have high strength and stiffness,and are widely used in industrial applications.The bonding form between steel and carbon fiber reinforced plastics is crucial for enhancing the strength at the bonding interface.In this study,a novel bonding structure was proposed:steel plates with equidistant holes,and carbon fiber fabric woven in an S-shape and bonded between the steel plates and carbon fibers to form a hybrid adhesive-woven bonding.The destructive tests were performed on both the hybrid adhesive-woven bonding joints and the adhesive bonding joints,comparative results indicate that the introduction of weaving process alters the stress state at the adhesive interface,transforming the failure mode from complete delamination at the steel-adhesive interface to a coupled failure mode that includes complete delamination at the steel-adhesive interface,partial delamination at the steel-adhesive interface,carbon fiber(damage)fracture,weaving slip,and steel plate distortion.Moreover,the unit thickness peak strength of the hybrid adhesive-woven bonding joints was found to be 25% higher on average than that of the adhesive bonding joints.Furthermore,the influences of the number of holes and the weaving width on the strength of the hybrid adhesive-woven bonding joints were investigated.It was observed that the strength of the bonding joints initially increased and then decreased with an increase in the number of holes.As for the weaving width,the strength of the bonding joints increased,but the rate of increase gradually slowed down.The bonding joints with a weaving width of 25 mm and a double-hole structure exhibited the highest strength,while those with a weaving width of 10 mm and a four-hole structure had the lowest strength,with an improvement of 106.38%compared to the lowest strength.
作者
何晓红
吕健
翟少杰
杨尚谕
赵新波
HE Xiaohong;LU Jian;ZHAI Shaojie;YANG Shangyu;ZHAO Xinbo(College of Science,Qingdao University of Technology,Qingdao 266525,China;Laboratory of Underground Unconventional Energy Development,Qingdao University of Technology,Qingdao 266525,China;Research Institute of Engineering Materials,China Petroleum Group,Xi’an 710077,China)
出处
《复合材料科学与工程》
北大核心
2025年第4期37-46,共10页
Composites Science and Engineering
基金
国家自然科学基金(52104004)。
关键词
胶-编混合搭接
开孔数量
编织宽度
接头强度
复合材料
hybrid adhesive-woven bonding
number of holes
weaving width
joint strength
composites
