scholarly journals Study and quantitative assessment of the structural inhomogeneities parameters of composite materials

2021 ◽  
Vol 2127 (1) ◽  
pp. 012056
Author(s):  
B A Chichigin ◽  
A M Kokurov ◽  
D E Subbotin
Keyword(s):  
Composite Materials ◽  
Experimental Testing ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Differential Signal ◽  
Conductive Materials ◽  
Pulsed Eddy Current ◽  
Interferometry Method ◽  
Fiber Composite Materials ◽  
Holographic Interferometry Method

Abstract The possibility of determining the size of the delamination region and the depth of its location in non-metallic multilayer weakly conductive materials using a unique pulsed eddy-current equipment by scanning the sample and registering the region of increasing amplitude of the differential signal has been practically confirmed. The nonstationary thermal and holographic interferometry method is used to obtain information on the shape and size of the bundles. For experimental testing, samples were used made of carbon fiber composite materials with artificially created defects in the structure of the material in the form of delaminations of various sizes and shapes.

Fracture toughness characterization of nanoreinforced carbon-fiber composite materials for damage mitigation

2011 ◽  
Author(s):  
Jennifer A. VanderVennet ◽  
Terrisa Duenas ◽  
Yuris Dzenis ◽  
Chad T. Peterson ◽  
Charles E. Bakis ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Damage Mitigation ◽  
Fiber Composite Materials

Concept Optimal Design of Composite Fan Blades

2011 ◽  
Author(s):  
J. S. Rao ◽  
Kiran Sheelavant ◽  
Balasaheb Bombale
Keyword(s):  
Composite Materials ◽  
Fiber Composite ◽  
Second Phase ◽  
Maximum Strain ◽  
Carbon Fiber Composite ◽  
The Third ◽  
Third Phase ◽  
Engine Blade ◽  
Fiber Composite Materials ◽  
Composite Blades

A procedure is outlined to determine the composite lay-out of a given baseline metallic fan blades. The vane material Titanium is replaced by Carbon Fiber composite materials. For the operating speed the baseline maximum strain in the vane is maintained and weight reduction is taken as the objective function. Three phases of optimization are suggested. In the first phase free size optimization is performed on the composite blades to determine the required topology. A layout of composites is then proposed. In the second phase based on free optimization results gauge optimization setup is illustrated for determining the thicknesses. In the third phase Ply-stacking optimization can be performed. By using composite materials substantial savings in the weight can be achieved without affecting the performance of engine blade.

Research on Carbon Fiber Composite Materials and F1 Racing Automobile Design

2013 ◽  
Vol 454 ◽  
pp. 263-267 ◽  
Author(s):  
Hai Tao Yin ◽  
Ming Mei Lang ◽  
Yun Na Zhao
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Structural Design ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Development History ◽  
Automobile Design ◽  
Design And Manufacturing ◽  
History Of ◽  
Fiber Composite Materials

Composite is composed of two or more materials and its main performance is significantly different from that of each material constituting it. Each material has an appropriate quality proportion. This paper summarizes performance features of carbon fiber composite, introduces the use and development history of composite in F1 automobile race, analyzes the structural design and manufacturing process of composite in F1 racing automobile and puts forward the performance of carbon fiber composite to be improved in F1 racing automobile.

Design and Fabrication of an Arm Exoskeleton for Aim Stabilization

2013 ◽  
Author(s):  
Daniel M. Baechle ◽  
Eric D. Wetzel ◽  
Sunil K. Agrawal
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Adaptive Algorithm ◽  
Degrees Of Freedom ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Aiming Movements ◽  
Voluntary Motion ◽  
Fiber Composite Materials

Accurately aiming and firing a pistol requires a steady hand. While many devices can steady a shooter’s arm or hand by restricting movement or degrees-of-freedom, few devices actively reduce involuntary tremors while allowing larger voluntary aiming movements. This paper details the design and fabrication of an arm exoskeleton that can actively damp arm tremors while allowing voluntary aiming movements. The device allows five degrees-of-freedom and is very lightweight due to its cable-driven architecture and use of carbon fiber composite materials. Tremorous movement is filtered out from voluntary motion, and an adaptive algorithm provides a tremor-cancelling signal to the cable control motors.

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