Influence of Temperature Variation on the Post Impact Strength of Glass Fiber Composite Materials

2001 ◽  
Author(s):  
Samuel I. Ibekwe ◽  
Patrick F. Mensah ◽  
Guoqiang Li ◽  
Su-Seng Pang
Keyword(s):  
Impact Strength ◽  
Glass Fiber ◽  
Temperature Variation ◽  
Fiber Composite ◽  
Low Velocity Impact ◽  
Effect Of Temperature ◽  
Glass Fiber Composite ◽  
Wide Range ◽  
Post Impact ◽  
The Impact

Abstract Glass Fiber Composite laminates were subjected to low velocity impact at 2 m/s using a semi-hemispherical drop tower tup. Impact damage were observed and recorded over a wide range of temperatures. Of particular interest is the post impact strength at these test temperatures. The effect of temperature variation on the impact damages and on the residual compressive buckling strength and elastic modulus is evaluated based on the test results.

Study on Modification of Phenolic Resin/Glass Fiber Composite by Polyvinyl Alcohol

2010 ◽  
Vol 44-47 ◽  
pp. 3045-3048
Author(s):  
Ming Yang ◽  
Yu Jing Nie
Keyword(s):  
Impact Strength ◽  
Polyvinyl Alcohol ◽  
Glass Fiber ◽  
Phenolic Resin ◽  
Fiber Composite ◽  
Aliphatic Chain ◽  
Glass Fiber Composite ◽  
Bending Resistance ◽  
New Type ◽  
The Impact

A new type of modified phenolic resin/glass fiber composite is introduced. Phenolic resin was modified with 2% polyvinyl alcohol(PVA). Test specimens were prepared by mixing and molding. Fourier transform infrared spectroscopy (FTIR) was adopted to investigate its molecular structure. FTIR results showed that long aliphatic chain were introduced into the structure of PR, which could absorb the energy during load was applied on the composite. The toughing mechanism was investigated by comparing the impact strength, bending resistance, tensile strength with non-modified phenolic resin. Results shows that the impact strength of the modified PR/GF composite reaches 53.21 KJ/m2, which is almost 2 times more than that of pure PR/GF composite. Finally, the application of the modified PR/GF composite on shoes head was introduced.

scholarly journals Cyclic Relaxation, Impact Properties and Fracture Toughness of Carbon and Glass Fiber Reinforced Composite Laminates

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7412
Author(s):  
Mohammed Y. Abdellah ◽  
Mohamed K. Hassan ◽  
Ahmed F. Mohamed ◽  
Ahmed H. Backar
Keyword(s):  
Fracture Toughness ◽  
Glass Fiber ◽  
Composite Laminates ◽  
Fiber Composite ◽  
Impact Behavior ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Glass Fiber Composite ◽  
Cyclic Relaxation ◽  
The Impact

In this paper, the mechanical properties of fiber-reinforced epoxy laminates are experimentally tested. The relaxation behavior of carbon and glass fiber composite laminates is investigated at room temperature. In addition, the impact strength under drop-weight loading is measured. The hand lay-up technique is used to fabricate composite laminates with woven 8-ply carbon and glass fiber reinforced epoxy. Tensile tests, cyclic relaxation tests and drop weight impacts are carried out on the carbon and glass fiber-reinforced epoxy laminates. The surface release energy GIC and the related fracture toughness KIC are important characteristic properties and are therefore measured experimentally using a standard test on centre-cracked specimens. The results show that carbon fiber-reinforced epoxy laminates with high tensile strength give high cyclic relaxation performance, better than the specimens with glass fiber composite laminates. This is due to the higher strength and stiffness of carbon fiber-reinforced epoxy with 600 MPa compared to glass fiber-reinforced epoxy with 200 MPa. While glass fibers show better impact behavior than carbon fibers at impact energies between 1.9 and 2.7 J, this is due to the large amount of epoxy resin in the case of glass fiber composite laminates, while the impact behavior is different at impact energies between 2.7 and 3.4 J. The fracture toughness KIC is measured to be 192 and 31 MPa √m and the surface energy GIC is measured to be 540.6 and 31.1 kJ/m2 for carbon and glass fiber-reinforced epoxy laminates, respectively.

Damage Characterization of Carbon and Glass Fiber Composite Plates Subjected to Low-Velocity Impact Using Thermography

2018 ◽  
Author(s):  
Khaled S. Al-Athel ◽  
Ahmed Alomari ◽  
Abul Fazal M. Arif
Keyword(s):  
Glass Fiber ◽  
Composite Laminates ◽  
Impact Damage ◽  
Fiber Composite ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Damage Characterization ◽  
Post Impact

Composites are prone to delamination damage when impacted by low velocity projectiles because of the poor through-thickness strength. Therefore, some of the problems with composites are their poor impact damage resistance, weak post-impact mechanical properties, and the difficulty to inspect the impacted area by nondestructive means. Damage characterization of composite materials requires a scientific methodology, knowledge of polymeric materials, and direct field experience. In this work, low-velocity impact response of composite laminates was experimentally studied using drop-tower to determine the energy absorption. Three types of composites were used: carbon fiber, glass fiber, and mixed fiber composite laminates. In addition, these composites were characterized using thermography to quantify their post impact damage. It was found with the 3D temperature distribution that a strong correlation can be determined between the measured temperatures at the impact region with the quantification of the damage using thermal imaging with advanced mid-wave camera.

Flexural and Impact Properties of 2D and 3D Jute/GF/Epoxy Hybrid Composite Materials

2015 ◽  
Vol 766-767 ◽  
pp. 178-182
Author(s):  
N.R.R. Anbusagar ◽  
K. Palanikumar ◽  
R. Mohanarangan ◽  
P. Sengottuvel
Keyword(s):  
Flexural Strength ◽  
Glass Fiber ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Fiber Composite ◽  
Three Dimensional ◽  
Glass Fiber Composite ◽  
Nylon Fiber ◽  
2D And 3D ◽  
The Impact

In order characterize the outstanding performance of the three dimensional (3D) hybrid composites, the charpy and flexural test has been carried out. 3D fiber structures have been achieved by using hand lay-up process and machine stitching method. Materials for hand lay-up and machine stitching process were glass fiber, jute fiber, and epoxy resin and nylon fiber respectively. Two dimensional (2D) glass fiber composite and 2D hybrid composite with the same stacking sequence as three dimensional (3D) counterparts have also been fabricated for the comparison of impact and flexural strength. The impact strength of 3D hybrid composite was increased (5-10%) compared with that 2D glass fiber and 2D hybrid composites. The flexural strength and modulus of 3D hybrid composite were increased (5-10%) compared with that of 2D hybrid composites.

scholarly journals Influence of Polymer Composites and Memory Foam on Energy Absorption in Vehicle Application

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1222 ◽  
Author(s):  
Ana Pilipović ◽  
Petar Ilinčić ◽  
Jelena Petruša ◽  
Zoran Domitran
Keyword(s):  
Glass Fiber ◽  
Polymer Composites ◽  
Energy Absorption ◽  
Carbon Fibers ◽  
Hybrid Composite ◽  
Influence Factor ◽  
Impact Force ◽  
Fiber Composite ◽  
Glass Fiber Composite ◽  
The Impact

The automotive industry is one of the biggest consumers of polymer composites. Aside from good mechanical properties, polymer composites have low mass, which positively affects the overall vehicle weight reduction and improves energy efficiency. Although polymer composites are used in various vehicle components, this paper focused on the application in vehicle bumper production. Two different composite plates with hybrid fiber layup were made; the first plate with a combination of glass and carbon fibers and the second with carbon and aramid. For comparison, and as a cheaper variant, a third plate was made only with glass fibers. In the first two plates, epoxy resin was used as the matrix, while in the third plate, polyester resin was used. Polyurethane memory foams of different densities (60, 80, 100 kg/m3) and thicknesses (10, 15, 20 mm) were used as impact force energy absorbers. With the factorial design of experiments, it was found that the thickness of the memory foam was the main influence factor. Without the use of memory foam, the hybrid composite, made of glass and carbon fibers, showed the highest energy absorption, while with the use of foam, the highest energy absorption was achieved with the glass fiber composite. Without the memory foam, the impact force measured on the glass/carbon hybrid composite was 9319.11 ± 93.18 N. Minimum impact force to the amount of 5143.19 ± 237.65 N was measured when the glass fiber composite plate was combined with the memory foam. When using memory foam, the impact force was reduced by 30–48%, depending on the type of composite used.

Wood-Glass Fiber Composite Materials in Structural Elements of Tram Tracks

2019 ◽  
Vol 777 (12) ◽  
pp. 73-77
Author(s):  
B.A. BONDAREV ◽  
◽  
T.N. STORODUBTSEVA ◽  
D.A. KOPALIN ◽  
S.V. KOSTIN ◽  
...  
Keyword(s):  
Composite Materials ◽  
Glass Fiber ◽  
Fiber Composite ◽  
Structural Elements ◽  
Glass Fiber Composite ◽  
Fiber Composite Materials

Energy absorbed ability and damage analysis for honeycomb sandwich material of bio-inspired micro aerial vehicle under low velocity impact

2020 ◽  
pp. 095440622097542
Author(s):  
Jianxun Du ◽  
Peng Hao ◽  
Mabao Liu ◽  
Rui Xue ◽  
Lin’an Li
Keyword(s):  
Honeycomb Structure ◽  
Low Velocity Impact ◽  
Parameter Study ◽  
Low Velocity ◽  
Micro Aerial Vehicle ◽  
Thin Walled Structures ◽  
Wide Range ◽  
Aerial Vehicle ◽  
Thin Walled ◽  
The Impact

Because of the advantages of light weight, small size, and good maneuverability, the bio-inspired micro aerial vehicle has a wide range of application prospects and development potential in military and civil areas, and has become one of the research hotspots in the future aviation field. The beetle’s elytra possess high strength and provide the protection of the abdomen while being functional to guarantee its flight performance. In this study, the internal microstructure of beetle’s elytra was observed by scanning electron microscope (SEM), and a variety of bionic thin-walled structures were proposed and modelled. The energy absorption characteristics and protective performance of different configurations of thin-walled structures with hollow columns under impact loading was analyzed by finite element method. The parameter study was carried out to show the influence of the velocity of impactor, the impact angle of the impactor and the wall thickness of honeycomb structure. This study provides an important inspiration for the design of the protective structure of the micro aerial vehicle.

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