Research on CFRP Periscope Outer Tube

2013 ◽  
Vol 750-752 ◽  
pp. 59-63
Author(s):  
Jin Guang Zhang ◽  
Yi Zeng ◽  
Guo Liang Zhang ◽  
Yao Cheng Fang ◽  
Ye Fa Hu ◽  
...  
Keyword(s):  
Fiber Orientation ◽  
Performance Test ◽  
Mechanical Characteristics ◽  
Bending Strength ◽  
Element Model ◽  
Outer Tube ◽  
Bending Performance ◽  
Fiber Reinforced Plastic ◽  
Number Of Layers ◽  
Reinforced Plastic

According to the structure and mechanical characteristics, a CFRP (carbon fiber reinforced plastic) periscope outer tube was designed. The parameters were determined such as fiber orientation angles, number of layers, proportion of fiber with different angles, and stacking sequences. A finite element model was built for the analysis of bending strength and modal. A CFRP periscope outer tube specimen was processed for the bending performance test. The results of simulation and experiments show that the CFRP periscope outer tube could meet the requirements.

Finite Element Analysis of Top-Hat–Stiffened Panels of Fiber-Reinforced–Plastic Boat Structures

2007 ◽  
Vol 44 (01) ◽  
pp. 16-26
Author(s):  
Ömer Eksik ◽  
R. Ajit Shenoi ◽  
Stuart S. J. Moy ◽  
Han Koo Jeong
Keyword(s):  
Finite Element ◽  
Lateral Pressure ◽  
Three Dimensional ◽  
Element Model ◽  
Stiffened Panel ◽  
Element Analysis ◽  
Stiffened Panels ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Experimental Findings

This paper describes the development of a finite element model in order to assess the static response of a top-hat-stiffened panel under uniform lateral pressure. Systematic calculations were performed for deflection, strain, and stress using the developed model based on the ANSYS three-dimensional solid element (SOLID45). The numerical modeling results were compared to the experimental findings for validation and to further understand an internal stress pattern within the different constituents of the panel for explaining the likely causes of the panel failure. Good correlation between experimental and numerical strains and displacements was achieved.

Effect of Cutting Speed on the Face Milling of CFRP Using a PCD Tool

2016 ◽  
Vol 874 ◽  
pp. 487-491
Author(s):  
Takayuki Kitajima ◽  
Takumi Horiuchi ◽  
Akinori Yui ◽  
Yosuke Ito
Keyword(s):  
Mechanical Characteristics ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Polycrystalline Diamond ◽  
Face Milling ◽  
Fiber Reinforced Plastic ◽  
Pcd Tool ◽  
Reinforced Plastic ◽  
The Face ◽  
Cutting Speeds

Carbon-fiber-reinforced plastic (CFRP) is used in various industries such as aerospace and automobile industries because of its high mechanical characteristics. However, this material is difficult to cut. Tool wear and delamination frequently occur during the drilling or cutting of CFRP. In previous studies, we developed a CFRP cutting tool using polycrystalline diamond (PCD). The PCD tool exhibited excellent cutting performance at cutting speeds as low as <120 m/min. In this study, the authors investigated the effect of cutting speed on the face milling of CFRP by using the developed PCD tool.

scholarly journals Research on Finite Element Model Modification of Carbon Fiber Reinforced Plastic (CFRP) Laminated Structures Based on Correlation Analysis and an Approximate Model

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2623 ◽  
Author(s):  
Yizheng Zhang ◽  
Yu’e Yang ◽  
Wenhao Du ◽  
Qing Han
Keyword(s):  
Finite Element ◽  
Correlation Analysis ◽  
Finite Element Model ◽  
Element Model ◽  
Approximate Model ◽  
Laminated Structure ◽  
Fiber Reinforced Plastic ◽  
Model Modification ◽  
Reinforced Plastic ◽  
Laminated Structures

Carbon fiber reinforced plastic (CFRP) laminated structures have been widely used in modern engineering due to their excellent material properties, especially in the aerospace and shipping industries. This requires a high-accuracy finite element model of CFRP laminated structures. However, it is difficult to master the mechanical properties of CFRP structures comprehensively and accurately due to influences from multiple aspects, such as dispersion of material properties, uncertainty of manufacturing technologies, etc. Therefore, a finite element model modification method of CFRP laminated structures based on correlation analysis and an approximate model was proposed. Aiming at minimizing the difference between the analysis model and the measured inherent frequency, the proposed method improves the finite element modeling accuracy of CFRP laminated structures, by iterative optimization based on a global optimization algorithm. In order to solve the problem of high spatial dimension and slow searching in modification of CFRP laminated structure models, the Pearson correlation analysis method was used to screen the material parameters which exert significant impacts on frequency characteristics to reconstruct the searching space. Based on significance parameters, an approximate response model of the CFRP laminated structural system was established. Meanwhile, the modeling accuracy of different orders of response surface models (RSM) and a radial basis function (RBF) neural network model was analyzed, and the best approximate modeling scheme was obtained. The approximate model was updated based on the multi-island genetic algorithm (MIGA) to modify the finite element model of the CFRP laminated structure model. The maximum error and mean error of the updated model are 1.47% and 0.45%. It was proved that the material parameters modified by the proposed method are applicable to simulation analysis of the CFRP laminated structure.

scholarly journals Degradation Behavior of Carbon Fiber Reinforced Plastic (CFRP) in Microwave Irradiation

2007 ◽  
Vol 7 (1 & 2) ◽  
pp. 157
Author(s):  
Nguyen Nguyen ◽  
Phuong Ngoc Diem ◽  
Susan A. Roces ◽  
Florinda T. Bacani ◽  
Masatoshi Kubouchi ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Microwave Irradiation ◽  
Bending Strength ◽  
Bending Test ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Cfrp Composites ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced plastic (CFRP) composites are being used increasingly not only in strengthening structures of civil infrastructures and aerospace or automotive industries but also in many applications such as in medical fields or chemical plants. The present study relates to resin compositions having beneficial physical and mechanical properties, which may include improved resistance to delamination. This study focused on the different behaviors of CFRP composites when subjected to microwave irradiation. Based on the results of the 3-point bending test and SEM images, the delamination tendencies of breaking the CFRP under microwave were discussed. The results can be summarized as follows: (1) CFRP can be degraded under microwave irradiation; (2) two delamination tendency curves of CFRP by microwave irradiation were observed; (3) only the bending strength values of CFRP decreased with increasing microwave power and residence time; and, (4) the degradation of CFRP by microwave was limited.

INFLUENCE OF UV RADIATION ON PHYSICAL-MECHANICAL CHARACTERISTICS OF FILAMENT-WOUND EPOXY GFRP BASED ON EPOXY MATRICES

2021 ◽  
pp. 2-6
Keyword(s):  
Epoxy Matrix ◽  
Mechanical Characteristics ◽  
Oxidative Degradation ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Filament Wound ◽  
Reinforced Plastic ◽  
Epoxy Matrices ◽  
Properties Of Composites

The effect of ultraviolet radiation on the physical-mechanical characteristics of filament-wound glass-fiber reinforced plastic (GFRP) based on an epoxy matrix has been studied. During 45 days, a decrease in strength of GFRP when stretching and bending takes place. However, the compressive strength increases. IR spectroscopy has shown that the change in the properties of composites occurs as a result of photo-oxidative degradation of the epoxy matrix.

IMPACT RESPONSE ANALYSIS OF COMPOSITE PLATE WITH DIFFERENT FIBER ORIENTATION ANGLES

2021 ◽  
Author(s):  
SHO KAJIHARA ◽  
TAKAHIRA AOKI ◽  
TOMOHIRO YOKOZEKI, ◽  
RYO HIGUCHI
Keyword(s):  
Fiber Orientation ◽  
Large Deflection ◽  
Ritz Method ◽  
Orientation Angle ◽  
Impact Response ◽  
Response Analysis ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Fiber Orientation Angle ◽  
Fan Blade

In this study, we established an analytical model of rectangular plate as a carbon fiber reinforced plastic (CFRP) fan blade, and simulated propagation of strain due to a foreign object collision such as a bird strike. The effect of fiber orientation angles was investigated as one method to reduce the propagating strain. In this model, large deflection caused by bird-striking is considered and nonlinear vibration equation derived from Rayleigh-Ritz method was integrated using Newmark-β method. It was shown that the strain propagates to the spanwise tip of the fan blade and causes detrimental damage there. It was also suggested that changing the fiber orientation angle of CFRP can reduce the strain transmitted to the tip of fan blade.

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