scholarly journals Designability analysis of the dynamics of thin-walled carbon fiber laminated shells based on varying the lay-up angle and number of plies

AIP Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 125212
Author(s):  
Daqian Zhang ◽  
Haochen Yuan
Keyword(s):  
Carbon Fiber ◽  
Laminated Shells ◽  
Thin Walled

scholarly journals Study on Calculation of Bearing Capacity of Axially Loaded CFRP-Strengthened Cold-Formed Thin-Walled Lipped Channel Steel Columns

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Yanan Sun ◽  
Pengfei Li ◽  
Guojin Qin
Keyword(s):  
Carbon Fiber ◽  
Bearing Capacity ◽  
Load Capacity ◽  
Slenderness Ratio ◽  
Steel Structures ◽  
Fiber Reinforced ◽  
Bonding Agents ◽  
Steel Column ◽  
Thin Walled ◽  
Carbon Fiber Reinforced

With the development of carbon fiber reinforced composites and the continuous improvement of the properties of bonding agents, scholars recommended using carbon fiber reinforced plastics (CFRP) to enhance cold-formed thin-walled C-shaped steel structures. It can provide a fast and effective way to strengthen and repair damaged steel structures. However, discussion on the bearing capacity calculation of cold-formed thin-walled C-section steel column strengthened by CFRP was limited. Also, the relevant influencing factors (the number of CFRP reinforcement layers), the orientation of CFRP (horizontal, vertical), and the location of CFRP reinforcement (web + flanges + lips, web + flanges, web, and flanges) were overlooked in calculating the bearing capacity of cold-formed thin-walled C-section steel column strengthened by CFRP. Then, the calculation result of the load capacity will be inaccurate. This work, therefore, studied the effects of CFRP reinforcement layers, CFRP direction, and CFRP reinforcement position on the ultimate load of CFRP-strengthened cold-formed thin-walled C-section steel column. A three-dimensional (3D) finite element model of cold-formed thin-walled steel strengthened by CFRP was established to discuss the bearing capacity under axial compression. Furthermore, a method for calculating the bearing capacity of the CFRP-strengthened cold-formed thin-walled C-section steel column was proposed based on the direct strength methods (DSM). The results indicate that not only the slenderness ratio, section size, and length of members but also the number of CFRP reinforcement layers and orientation of CFRP have an impact on the calculation of bearing capacity. The equation modified in this work has excellent accuracy and adaptability. Predicting the bearing capacity of reinforced members is necessary to give full play to the performance of CFRP accurately. Thus, the methods proposed can provide a reference value for practical engineering.

scholarly journals A Comparative Study of the Mechanical Properties of FDM 3D Prints Made of PLA and Carbon Fiber-Reinforced PLA for Thin-Walled Applications

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7062
Author(s):  
Jerzy Bochnia ◽  
Malgorzata Blasiak ◽  
Tomasz Kozior
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Lean Manufacturing ◽  
Industrial Revolution ◽  
Base Material ◽  
Dimensional Accuracy ◽  
Strength Analysis ◽  
Fused Deposition Modelling ◽  
Fused Deposition ◽  
Thin Walled

This study focused on the analysis of the mechanical properties of thin-walled specimens fabricated by fused deposition modelling (FDM). Two materials were considered, i.e., polylactide (PLA) and polylactide with carbon fiber (PLA-CF). The article describes how the specimens with different thicknesses and printing orientations were designed, printed, measured to assess their geometric and dimensional accuracy, subjected to tensile testing, and examined using scanning electron microscopy. The data provided here can be used for further research aimed at improving filament deposition and modifying the base material by combining it with different components, for example carbon fiber. The investigations revealed that the properties of thin-walled elements produced by FDM varied significantly depending on the thickness. So far, this problem has not been investigated extensively. Research by analyzing the key parameter, which is the direction of printing that is important for thin-walled models, provides a lot of new information for designers and technologists and opens the way to further extended scientific research in the field of the strength analysis of thin-walled models produced by 3D printing, which is very applicable to structure optimization in the era of the industrial revolution 4.0 and progress in the LEAN manufacturing process.

An Experimental Study to Determine Mechanical and Thermophysical Characteristics of Thin-Walled Carbon Plastic Antenna Reflectors

2020 ◽  
pp. 84-91
Author(s):  
A.D. Novikov ◽  
S.V. Reznik ◽  
O.V. Denisov
Keyword(s):  
Carbon Fiber ◽  
Epoxy Compound ◽  
Carbon Plastic ◽  
Carbon Fabric ◽  
Thermophysical Characteristics ◽  
Space Antennas ◽  
Fabric Composites ◽  
Thin Walled ◽  
Antenna Reflector

High requirements are imposed on the mass and dimensional stability of reflectors of onboard mirror space antennas in promising communication satellites. To meet these requirements, new design and layout schemes for reflectors using composite materials are being developed. The use of flat reinforced carbon fabric composites in these designs is of particular interest. A technique is developed for the experimental determination of mechanical and thermophysical characteristics of the carbon fiber used in a thin-walled shell (0.6 mm) of the onboard space antenna reflector. Data are obtained on the elastic modulus of the carbon fiber based on Aspro-A80 carbon fabric and Huntsman Araldite LY8615 US/XB 5173 Hardener epoxy compound in two directions. The thermal conductivity of the material in the plane of reinforcement is determined.

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