为了研究TC4钛合金与碳纤维增强热塑性复合材料(CFRTP)叠层结构摩擦搭接焊(friction lap joining,FLJ)过程中的温度变化及其影响,建立了摩擦热源以及热传导的三维几何模型。利用ABAQUS软件进行模拟,得到了FLJ过程的温度场及热循环曲线,...为了研究TC4钛合金与碳纤维增强热塑性复合材料(CFRTP)叠层结构摩擦搭接焊(friction lap joining,FLJ)过程中的温度变化及其影响,建立了摩擦热源以及热传导的三维几何模型。利用ABAQUS软件进行模拟,得到了FLJ过程的温度场及热循环曲线,分析了旋转速率和焊接速率等参量对温度场的影响规律。并进行了TC4/CFRTP摩擦搭接焊试验,通过连接区域的显微形貌观察分析了温度变化对焊接缺陷的影响。结果表明,模型能够快速、准确模拟TC4/CFRTP叠层结构FLJ过程的温度变化;旋转速率越大、焊接速率越小,则连接区域温度越高;过高的温度导致CFRTP的热塑性基体发生热降解,未能及时排出的热解气体在连接区域形成气泡,气泡数量及大小随温度升高而增多、增大。展开更多
A study was conducted to evaluate the current production capabilities of the Mark One? 3D printer in printing carbon fibre reinforced thermoplastic (CFRTP) tensile test specimens according to the JIS K 7073 by making ...A study was conducted to evaluate the current production capabilities of the Mark One? 3D printer in printing carbon fibre reinforced thermoplastic (CFRTP) tensile test specimens according to the JIS K 7073 by making use of fused deposition modelling. Several different types of CFRTP tensile test specimens are printed and are tensile tested in the longitudinal direction to obtain an overview of the mechanical properties of 3D printed CFRTP material. These properties are compared with the literature values known for composite materials to see if these agree. The main goal of this research is to increase the knowledge of the 3D printing process of CFRTP and to later use this knowledge to further improve the 3D printing process to obtain stronger 3D printed CFRTP materials.展开更多
帝人株式会社宣布,美国通用汽车公司选用了其热可塑性碳纤维复合材料(CFRTP)产品'Sereebo',用于两款皮卡车部件中。这是全球首例使用CFRTP制作量产汽车的结构零件。'Sereebo'将用于通用汽车新款皮卡车型'GMC Sierra...帝人株式会社宣布,美国通用汽车公司选用了其热可塑性碳纤维复合材料(CFRTP)产品'Sereebo',用于两款皮卡车部件中。这是全球首例使用CFRTP制作量产汽车的结构零件。'Sereebo'将用于通用汽车新款皮卡车型'GMC Sierra Denari 1500'和'GMC Sierra AT4 1500'的车厢“CarbonPro”。皮卡箱内部前板、侧面和底部面板使用了将碳纤维随机分散的“Sereebo”材料。展开更多
Grid pattern was textured on Ti-6 Al-4 V alloy(TC4)substrate surface by nanosecond laser system.Laser joining of carbon fiber reinforced thermoplastic composite(CFRTP)to TC4 joints were performed,and the effect of tex...Grid pattern was textured on Ti-6 Al-4 V alloy(TC4)substrate surface by nanosecond laser system.Laser joining of carbon fiber reinforced thermoplastic composite(CFRTP)to TC4 joints were performed,and the effect of texture grid depth was investigated.The contact angle of molten CFRTP on textured TC4 surface was measured and the tensile-shear force was tested.The fracture surface and interface morphology were observed.The results indicated that the wettability of molten CFRTP on TC4 surface improved remarkably after laser textured TC4.Shear force of CFRTP/TC4 joints was increased by 156%after laser textured TC4 surface.When the depth of grid was deeper than 100μm,contact angle increased and incomplete filling of molten CFRTP in grid occurred,the shear force thus decreased gradually.Resin-carbon fibers mixture was adhered on the fracture surface of TC4,and the variation tendency of adhesion ratio was consistent with that of shear force.TC4 matrix was exfoliated from substrate and adhered at the fracture surface of CFRTP,indicating stronger mechanical interlocking occurred at the joining interface after laser textured TC4 surface.Beside mechanical interlocking,compound layer consisted of CTi_(0.42)V_(1.58)carburization phase was also confirmed at interface,suggesting that chemical bonding also occurred at the joining interface.展开更多
文摘为了研究TC4钛合金与碳纤维增强热塑性复合材料(CFRTP)叠层结构摩擦搭接焊(friction lap joining,FLJ)过程中的温度变化及其影响,建立了摩擦热源以及热传导的三维几何模型。利用ABAQUS软件进行模拟,得到了FLJ过程的温度场及热循环曲线,分析了旋转速率和焊接速率等参量对温度场的影响规律。并进行了TC4/CFRTP摩擦搭接焊试验,通过连接区域的显微形貌观察分析了温度变化对焊接缺陷的影响。结果表明,模型能够快速、准确模拟TC4/CFRTP叠层结构FLJ过程的温度变化;旋转速率越大、焊接速率越小,则连接区域温度越高;过高的温度导致CFRTP的热塑性基体发生热降解,未能及时排出的热解气体在连接区域形成气泡,气泡数量及大小随温度升高而增多、增大。
文摘A study was conducted to evaluate the current production capabilities of the Mark One? 3D printer in printing carbon fibre reinforced thermoplastic (CFRTP) tensile test specimens according to the JIS K 7073 by making use of fused deposition modelling. Several different types of CFRTP tensile test specimens are printed and are tensile tested in the longitudinal direction to obtain an overview of the mechanical properties of 3D printed CFRTP material. These properties are compared with the literature values known for composite materials to see if these agree. The main goal of this research is to increase the knowledge of the 3D printing process of CFRTP and to later use this knowledge to further improve the 3D printing process to obtain stronger 3D printed CFRTP materials.
文摘帝人株式会社宣布,美国通用汽车公司选用了其热可塑性碳纤维复合材料(CFRTP)产品'Sereebo',用于两款皮卡车部件中。这是全球首例使用CFRTP制作量产汽车的结构零件。'Sereebo'将用于通用汽车新款皮卡车型'GMC Sierra Denari 1500'和'GMC Sierra AT4 1500'的车厢“CarbonPro”。皮卡箱内部前板、侧面和底部面板使用了将碳纤维随机分散的“Sereebo”材料。
基金financially supported by National Natural Science Foundation of China(No.51875129)。
文摘Grid pattern was textured on Ti-6 Al-4 V alloy(TC4)substrate surface by nanosecond laser system.Laser joining of carbon fiber reinforced thermoplastic composite(CFRTP)to TC4 joints were performed,and the effect of texture grid depth was investigated.The contact angle of molten CFRTP on textured TC4 surface was measured and the tensile-shear force was tested.The fracture surface and interface morphology were observed.The results indicated that the wettability of molten CFRTP on TC4 surface improved remarkably after laser textured TC4.Shear force of CFRTP/TC4 joints was increased by 156%after laser textured TC4 surface.When the depth of grid was deeper than 100μm,contact angle increased and incomplete filling of molten CFRTP in grid occurred,the shear force thus decreased gradually.Resin-carbon fibers mixture was adhered on the fracture surface of TC4,and the variation tendency of adhesion ratio was consistent with that of shear force.TC4 matrix was exfoliated from substrate and adhered at the fracture surface of CFRTP,indicating stronger mechanical interlocking occurred at the joining interface after laser textured TC4 surface.Beside mechanical interlocking,compound layer consisted of CTi_(0.42)V_(1.58)carburization phase was also confirmed at interface,suggesting that chemical bonding also occurred at the joining interface.
