Potential Load-Bearing Bone Substitution Material: Carbon-Fiber-Reinforced Magnesium-Doped Hydroxyapatite Composites with Excellent Mechanical Performance and Tailored Biological Properties

Author(s):  
Xueni Zhao ◽  
Zhi Yang ◽  
Qingyao Liu ◽  
Pinglin Yang ◽  
Pengfei Wang ◽  
...  
2020 ◽  
Vol 46 (6) ◽  
pp. 7903-7911
Author(s):  
Xueni Zhao ◽  
Jiamei Zheng ◽  
Weigang Zhang ◽  
Xueyan Chen ◽  
Zhenzhen Gui

2013 ◽  
Vol 689 ◽  
pp. 353-357
Author(s):  
Chong Xi Bai ◽  
Xin Yan Shao ◽  
Qiu Ping Wang

The law of stress increment of unbonded carbon fiber reinforced polymer (CFRP) tendons at service stage and flexural load bearing capacity limit state is unclear, so it is difficult to accurately calculate crack width, deflection and load bearing capacity. In order to calculate the stress of CFRP tendons, deformation compatibility condition and moment-curvature analysis method are used to compile nonlinear full-range analysis programs of simply supported concrete beam partially prestressed with unbonded CFRP tendons. The computing results of stress in CFRP tendons are in good agreement with the tested results as a whole, so it indicates that the simulation analysis programs are reliable.


2020 ◽  
Vol 200 ◽  
pp. 108426 ◽  
Author(s):  
Yan Ma ◽  
Shanshan Jin ◽  
Tomohiro Yokozeki ◽  
Masahito Ueda ◽  
Yuqiu Yang ◽  
...  

Author(s):  
Nashat Nawafleh ◽  
Emrah Celik

Abstract Additive manufacturing (AM) is a novel technology which allows fabrication of complex geometries from digital representations without tooling. In addition, this technology results in low material waste, short lead times and cost reduction especially for the production of parts in low quantities. Current additive manufacturing processes developed for thermoplastic sandwich panels suffer from an unavoidable weak mechanical performance and low thermal resistance. To overcome these limitations, emphasis is paid in this study on direct write AM technology for the fabrication of short carbon fiber-reinforced sandwich panel composites. Sandwich panels using different infill densities with high strength (> 107 MPa), and high short carbon fiber volume (46%) were attained successfully. In parallel to the strength enhancement, these sandwich panels possessed reduced densities (0.72 g/cc3) due to their lightweight lattice core structures. The mechanical performance of the created sandwich panels was examined and compared to the unreinforced, base ink structures by performing compression tests. Successful fabrication and characterization of the additively manufactured thermoset-based carbon fiber reinforced, sandwich panels in this study can extend the range of applications for AM composites that require lightweight structures, high mechanical performance as well as the desired component complexity.


Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2453
Author(s):  
Mei Fang ◽  
Na Zhang ◽  
Ming Huang ◽  
Bo Lu ◽  
Khalid Lamnawar ◽  
...  

Carbon fiber reinforced polycarbonate (CF/PC) composites have attracted attention for their excellent performances. However, their performances are greatly affected by environmental factors. In this work, the composites were exposed to hydrothermal aging to investigate the effects of a hot and humid environment. The mechanical properties of CF/PC composites with different aging times (0, 7, 14, 21, 28, 35, and 42 days) were analyzed. It was demonstrated that the storage modulus of CF/PC composites with hot water aged for seven days has the highest value in this sampling period and frequency. Through the solid particle erosion experiment, it was found that the hydrothermal aging causes the deviation of the maximum erosion angle of composites, indicating the composites underwent ductile–brittle transformation. Furthermore, the crack and cavity resulting from the absorption of water was observed via the scanning electron microscope (SEM). This suggested that the hydrothermal aging leads to the plasticization and degradation of CF/PC composites, resulting in a reduction of corrosion resistance.


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