Evaluation of effective elastic properties of layered composite fiber-reinforced plastic plates by piezoelectrically induced guided waves and laser Doppler vibrometry

2015 ◽  
Vol 125 ◽  
pp. 449-458 ◽  
Author(s):  
A.A. Eremin ◽  
E.V. Glushkov ◽  
N.V. Glushkova ◽  
R. Lammering
Keyword(s):  
Elastic Properties ◽  
Guided Waves ◽  
Composite Fiber ◽  
Layered Composite ◽  
Laser Doppler ◽  
Fiber Reinforced ◽  
Laser Doppler Vibrometry ◽  
Effective Elastic Properties ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic

Failure mode–driven quality analysis of operational risks for composite fiber-reinforced plastic assembly

2017 ◽  
Vol 233 (1) ◽  
pp. 267-277 ◽  
Author(s):  
John PT Mo ◽  
Bathmarajah Suparayan
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Risk Mitigation ◽  
Composite Fiber ◽  
Poor Quality ◽  
Quality Analysis ◽  
Assembly Process ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic

Composite fiber-reinforced plastic products have many failure modes in the manufacturing stage. The cost of rework is high. To ensure a reliable manufacturing process and outcome, this article presents a new method to prioritize assembly process errors according to a risk-based cost of poor quality. The method combines a range of reliability techniques including cause–effect diagram, fault tree, and analytic hierarchy process to achieve multiple failure mode assessment. The outcome of this research provides direct links to develop risk mitigation plans to treat the prioritized risks of production errors in the composite fiber-reinforced plastic assembly process.

scholarly journals Composite Fiber Reinforced Plastic one-shoot drilling: Quality inspection assessment and tool wear evaluation

2017 ◽  
Vol 13 ◽  
pp. 139-145 ◽  
Author(s):  
J. Fernández-Pérez ◽  
J.L. Cantero ◽  
J. Díaz Álvarez ◽  
M.H. Miguélez
Keyword(s):  
Tool Wear ◽  
Composite Fiber ◽  
Quality Inspection ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Drilling Quality ◽  
Wear Evaluation

scholarly journals Stressing State Analysis of Reinforced Concrete Beam Strengthened by CFRP Sheet with Anchoring Device

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 576
Author(s):  
Liang Luo ◽  
Jie Lai ◽  
Jun Shi ◽  
Guorui Sun ◽  
Jie Huang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Strain Distribution ◽  
Carbon Fiber Reinforced Plastic ◽  
Rc Beams ◽  
Fiber Reinforced ◽  
Strain Distribution Pattern ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

This paper investigates the working performance of reinforcement concrete (RC) beams strengthened by Carbon-Fiber-Reinforced Plastic (CFRP) with different anchoring under bending moment, based on the structural stressing state theory. The measured strain values of concrete and Carbon-Fiber-Reinforced Plastic (CFRP) sheet are modeled as generalized strain energy density (GSED), to characterize the RC beams’ stressing state. Then the Mann–Kendall (M–K) criterion is applied to distinguish the characteristic loads of structural stressing state from the curve, updating the definition of structural failure load. In addition, for tested specimens with middle anchorage and end anchorage, the torsion applied on the anchoring device and the deformation width of anchoring device are respectively set parameters to analyze their effects on the reinforcement performance of CFRP sheet through comparing the strain distribution pattern of CFRP. Finally, in order to further explore the strain distribution of the cross-section and analyze the stressing-state characteristics of the RC beam, the numerical shape function (NSF) method is proposed to reasonably expand the limited strain data. The research results provide a new angle of view to conduct structural analysis and a reference to the improvement of reinforcement effect of CFRP.

scholarly journals Design of Center Pillar with Composite Reinforcements Using Hybrid Molding Method

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2047
Author(s):  
Ji-Heon Kang ◽  
Jae-Wook Lee ◽  
Jae-Hong Kim ◽  
Tae-Min Ahn ◽  
Dae-Cheol Ko
Keyword(s):  
Composite Materials ◽  
Weight Reduction ◽  
Fuel Efficiency ◽  
Vehicle Body ◽  
Process Time ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Molding Method ◽  
Reinforced Plastic ◽  
Composite Reinforcements

Recently, with the increase in awareness about a clean environment worldwide, fuel efficiency standards are being strengthened in accordance with exhaust gas regulations. In the automotive industry, various studies are ongoing on vehicle body weight reduction to improve fuel efficiency. This study aims to reduce vehicle weight by replacing the existing steel reinforcements in an automobile center pillar with a composite reinforcement. Composite materials are suitable for weight reduction because of their higher specific strength and stiffness compared to existing steel materials; however, one of the disadvantages is their high material cost. Therefore, a hybrid molding method that simultaneously performs compression and injection was proposed to reduce both process time and production cost. To replace existing steel reinforcements with composite materials, various reinforcement shapes were designed using a carbon fiber-reinforced plastic patch and glass fiber-reinforced plastic ribs. Structural analyses confirmed that, using these composite reinforcements, the same or a higher specific stiffness was achieved compared to the that of an existing center pillar using steel reinforcements. The composite reinforcements resulted in a 67.37% weight reduction compared to the steel reinforcements. In addition, a hybrid mold was designed and manufactured to implement the hybrid process.

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