Article
Engineering, Multidisciplinary
Junke Jiao, Qi Zou, Yiyun Ye, Zifa Xu, Liyuan Sheng
Summary: The study investigated the impact of a metal surface laser plastic-covered method and high-speed laser rotational welding technology on the joining quality between CFRTP and TC4 alloy, with significant improvements in joint strength and fatigue resistance observed as a result.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Junke Jiao, Jihao Xu, Chenghu Jing, Xiangyu Cheng, Di Wu, Haolei Ru, Kun Zeng, Liyuan Sheng
Summary: The effect of laser micro-texturing on the laser bonding of CFRTS and TC4 alloy was studied. It was found that the laser micro-textures with different scanning spacings result in different temperature field distributions on the PA6 interface, leading to a change in heat input on the CFRTS surface. When the laser scanning spacing is 0.3 mm, the joint strength can reach 14.3 MPa.
Article
Optics
Yifan Liu, Jianhui Su, Guolong Ma, Xiaohui Han, Caiwang Tan, Laijun Wu, Bo Chen, Xiaoguo Song
Summary: Laser texturing on AZ31B magnesium alloy surface significantly improved the wettability of molten CFRTP, reducing the contact angle and increasing tensile-shear force in joints with groove widths of 0.2 mm and 0.3 mm. The formation of a diffusion layer and identification of MgCO3 at the joining interface demonstrated the effective strength improvement through mechanical interlocking and chemical bonding.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Industrial
Yifan Liu, Caiwang Tan, Zequn Zhang, Jianhui Su, Xiaoguo Song, Bo Chen, Hongbo Xia, Tao Wu
Summary: In this study, the effect of oxide film on laser assisted joining of carbon fiber reinforced thermoplastic composites (CFRTP) and AZ31B was investigated by performing surface pre-oxidation of AZ31B magnesium alloy using two common methods. Both micro-arc oxidation (MAO) and annealing produced oxide films, but with different structures. The oxide films effectively enhanced the mechanical properties of the joint by inhibiting the decomposition of CFRTP and relieving residual stress. MAO coating further reduced heat conduction and facilitated the formation of a new chemical bonding MgCO3, strengthening the mechanical interlocking. The MAO joints showed higher tensile-shear strengths compared to annealed joints and untreated joints.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Ziwei Feng, Guolong Ma, Jianhui Su, Caiwang Tan, Xiaohui Han, Hongyun Zhao, Bo Chen, Xiaoguo Song
Summary: The study investigated the effect of laser power, traveling speed, and defocus distance on the bonding interface and joint properties of 6061 aluminium alloy and carbon fiber reinforced thermoplastic composite. The results showed that the shear strength of joints first increased and then decreased with the increase of heat input. XPS analysis confirmed that the main bonding mechanism between aluminium alloy and CFRTP was mechanical interlocking.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Automation & Control Systems
Weiwen Chen, Xiqin Liu, Hengchang Bu, Feiyun Wang, Jiebang Luo, Xiaohong Zhan
Summary: This research explores the laser joining between CFRTP and TC4 titanium alloy under different scanning modes to achieve high-quality joints. The results indicate that oscillating laser joining outperforms linear laser joining in terms of resin filling and temperature distribution uniformity.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Insung Choi, Hyung Doh Roh, Woo Nam Jeong, Hu Young Jeong, Jeong Suh, Jin-Woo Yi, Moon-Kwang Um, Youngseok Oh, Kwang-Hyeon Lee
Summary: This study demonstrates the feasibility of laser direct joining of carbon-fiber-reinforced thermoplastic (CFRTP) materials using laser heat conduction technique. The results show that increasing the laser irradiation spots per unit area leads to higher joining strength. The highest average interlaminar shear strength achieved was 30.9 MPa.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Qi Wang, Zhen-yuan Jia, Bo-yu Zhang, Dun-lin Gao, Yu Ma, Jing-yuan Liu
Summary: By controlling the temperature during laser direct joining, thermal defects can be avoided and joint performance improved. Establishing temperature simulation and regression models, along with determining constraints, have led to optimized process parameters that enhance joint strength.
MATERIALS & DESIGN
(2021)
Article
Mechanics
Hui-Jin Um, Ji-Seok Lee, Ji-Hwan Shin, Hak-Sung Kim
Summary: Sandwich structures with trapezoidal corrugated cores were 3D printed using fused deposition modeling (FDM) method and short and continuous carbon fiber (CF) reinforced nylon filament. The bending characteristics of different core types were investigated through three-point bending (3PB) tests. It was found that the mechanical behavior and failure modes were significantly influenced by core materials and the split number of cores. The corrugated sandwich structure printed using continuous carbon fiber showed dramatic improvements in mechanical performances compared to a PET foam core structure, with 4.1 times higher specific flexural stiffness, 2.6 times larger specific load capability, and 8.6 times larger energy absorption capability. This result was attributed to the precise fiber alignment achievable with continuous CF 3D printing technology.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Jinsil Cheon, Minkook Kim
Summary: Novel mass-producible MWCNT-anchored carbon fiber was developed and applied as a new incorporation into CFRTPs to improve the material's properties. Based on the results, an optimal concentration and process method for MWCNT anchoring were suggested, and the anchored MWCNTs significantly enhanced the impact resistance and ILSS of the CFRTPs.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Mechanics
Tetsuya Yamamoto, Yusuke Ota
Summary: A technique was developed in this study to enhance carbon fiber-reinforced thermoplastics (CFRTP) by using polypropylene and nylon, which improved their mechanical properties and bending strength.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Jiayu Chen, Jinyu Bai, Sijie Zu, Zhe Lin, Shanglu Yang
Summary: In this paper, an adjustable flat-top rectangular diode laser beam was used as a heat source to join quenched and portioned QP980 steel and CFRTP. The relationship between interfacial thermal history and joint performance was explored. The results showed that thermal history had a significant impact on interfacial chemical compositions and the formation of joint defects, and adjusting the interfacial thermal history can achieve excellent interfacial bonding.
COMPOSITE STRUCTURES
(2023)
Article
Polymer Science
Lu Chen, Tianzhengxiong Deng, Helezi Zhou, Zhigao Huang, Xiongqi Peng, Huamin Zhou
Summary: This paper presents a three-dimensional simulation method for a one-step compression-stamping process, which can conduct thermoplastic compression molding and continuous fiber reinforced thermoplastic composite stamping forming simultaneously. By using new computational models and a fluid structure interaction framework, the simulation method can accurately replicate the actual molding process.
Article
Engineering, Manufacturing
Sahendra P. Sharma, R. Vilar
Summary: Unidirectional carbon fiber-reinforced epoxy matrix composites were treated with femtosecond laser pulses, resulting in laser-induced periodic surface structures on the carbon fiber surface and granular morphology on the epoxy matrix. The difference in ablation depth between the fiber and epoxy was measured and showed significant changes.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Optics
Ying Xu, Hengchang Bu, Feiyun Wang, Wanping Ma, Xiaohong Zhan
Summary: This paper investigates the laser joining of CFRTP and titanium alloy, and verifies the effectiveness of the joining process through numerical simulations and experiments. The results show that the tensile failure load of the joint meets the requirements under the optimized process parameters, and the fatigue failure mode under cyclic loading has also been studied.
OPTICS AND LASER TECHNOLOGY
(2022)