Research on the Impact Toughness of Basalt Fiber Reinforced Composites

2011 ◽  
Vol 194-196 ◽  
pp. 263-266
Author(s):  
Zong Fu Guo ◽  
Zhi Li Zhong
Keyword(s):  
Impact Toughness ◽  
Epoxy Resin ◽  
Testing Machine ◽  
Basalt Fiber ◽  
Impact Testing ◽  
Matrix Cracking ◽  
Low Velocity Impact ◽  
Resin Composites ◽  
Epoxy Resin Composites ◽  
The Impact

In this paper the impact toughness of the basalt fabric reinforced epoxy resin composites was discussed. In the test, the basalt fabricwas used to reinforce the TDE-86epoxy resin, and 70#anhydride was used as curing agent. The mode of [45°/-45°] was chosen to layering and prepare the unit-cells. Resin Transfer Molding instrument was used to cure and make the basalt fabricreinforced epoxy resin composites, and the instron-based Dynatup9250HV material impact testing machine was used to test the impact resistance. Conclusion: in the low-velocity impact test, the maximum load the sample can bear was about 9.6538kN，and the total energy the sample absorbed was 19.3030J; Observing the impact morphology of the sample, the basalt fabricreinforced epoxy resin composite was not perforated, then its failure mode was matrix cracking, drawing and fracture of the fiber. The results provided a scientific basis for basalt fabricreinforced composites, and increase the development of the production related to the basalt fabriccomposites.

scholarly journals Properties of Graphene Oxide/Epoxy Resin Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Jijun Tang ◽  
Haijun Zhou ◽  
Yunxia Liang ◽  
Xinlan Shi ◽  
Xin Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Epoxy Resin ◽  
Raw Materials ◽  
Damping Capacity ◽  
Resin Composites ◽  
Damping Properties ◽  
Natural Graphite ◽  
Epoxy Resin Composites ◽  
The Impact ◽  
Properties Of Composites

The graphene oxide (GO) was obtained by pressurized oxidation method using natural graphite as raw materials. Then the GO/epoxy resin composites were prepared by casting. The mechanical and damping properties of composites were studied. As a result, the impact intensity of GO/epoxy resin composites was prominently improved with the content of the graphene oxide increasing. The glass transition temperature decreased and the damping capacity is improved.

Impact Damage and Strength Reduction Behavior of Honeycomb Sandwich Structure Subjected to Low Velocity Impact

2006 ◽  
Vol 306-308 ◽  
pp. 279-284
Author(s):  
Ki Weon Kang ◽  
Jung Kyu Kim ◽  
Heung Seob Kim
Keyword(s):  
Sandwich Structure ◽  
Impact Damage ◽  
Testing Machine ◽  
Strength Reduction ◽  
Impact Testing ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Reduction Behavior ◽  
Velocity Impact ◽  
The Impact

The goals of the paper are to identify the impact damage and strength reduction behavior of sandwich structure, composed of carbon/epoxy laminates skin and Nomex core with two kinds of thickness (10 and 20mm). For these, low velocity impact tests were conducted using the instrumented impact-testing machine and damages are inspected by SAM. And then, subsequent static tests are conducted under flexural loading to identify the strength reduction behavior of the impacted sandwich structures. The impact damages are mainly delamination in carbon/epoxy skin and their behavior is mostly independent of core thickness. Also, their energy absorbing behavior is identified through calculating the energy absorbed by impact damage. Finally, the strength reduction behavior is evaluated through Caprino’s model, which was proposed on the unidirectional laminates.

Preparation and Properties of Tea Polyphenol Modified Graphene Oxide/Epoxy Resin Composites

2019 ◽  
Vol 814 ◽  
pp. 3-11
Author(s):  
Xiang Yu Ren ◽  
Hui Chen ◽  
Jing Wu ◽  
Hong Bo Liu
Keyword(s):  
Graphene Oxide ◽  
Epoxy Resin ◽  
Thermo Gravimetric Analysis ◽  
Testing Machine ◽  
Gravimetric Analysis ◽  
Resin Composites ◽  
X Ray ◽  
Modified Graphene Oxide ◽  
Epoxy Resin Composites ◽  
Modified Graphene

Microcrystalline graphite (MG) was used as raw material and oxidated by Hummers method. And further the graphene oxide (GO) was obtained by ultrasonic stripping. The TP modified graphene (TPG) was prepared by the surface grafting of pure natural green tea extract tea polyphenols (TP) on the surface of GO. Finally, the TPG/epoxy resin composite was prepared by solution blending and heat-curing moulding method.The characterization of structure and properties of TPG was analyzed by X ray diffraction pattern (XRD), infrared spectroscopy (FT-IR), thermo gravimetric analysis (TGA) and X ray photoelectron spectroscopy (XPS). A universal material testing machine was used to test the mechanical properties of epoxy resin composites with different addition of TPG. Field emission scanning electron microscopy (SEM) was used to observe the tensile-sectional morphology of the composites. The thermal stability of the composites was investigated by thermogravimetry and thermal dilatometer. The experimental results showed that the TP molecule was successfully grafted on the oxygen-containing functional groups of the GO surface through the phenolic hydroxyl group.When the addition of TPG was 1.0 wt%, the decomposition temperature of the epoxy resin was increased by 22.2 °C,and the surface resistivity decreased from 1.35×1014 Ω·m to 1.7×109 Ω·m. When the added amount of TPG was 0.5 wt%, the tensile strength of composites was increased by 13.5% reaching 59.85 MPa.

Thermomechanical Properties and Morphology of Liquid Crystalline Polyurethane/Epoxy Resin Composites

2011 ◽  
Vol 194-196 ◽  
pp. 1421-1425 ◽  
Author(s):  
Jian Feng Ban ◽  
Shao Rong Lu ◽  
Dong Guo ◽  
Kuo Liu ◽  
Chong Xi Luo
Keyword(s):  
Epoxy Resin ◽  
Liquid Crystalline ◽  
Decomposition Temperature ◽  
Thermomechanical Properties ◽  
Resin Composites ◽  
Flexible Chain ◽  
Polyurethane Elastomers ◽  
Fracture Feature ◽  
Epoxy Resin Composites ◽  
The Impact

One new kind of epoxy resin toughening agent defined as liquid crystalline polyurethane elastomers (LCPUE) containing mesogenic ester groups and trithylene glycol flexible chain was synthesized and its nematic structure was observed by POM and XRD. The LCPUE was to modify the epoxy resin (E-51). The mechanical properties, fracture surface morphology, and thermal properties of the E-51/LCPUE curing system were systematically investigated. Experimental results revealed that the impact strength of the epoxy resin modified with LCPU is 1.9 times higher than that of the unmodified system, enhanced the thermal decomposition temperature by about 12 °C, and the fracture surfaces all modified systems display tough fracture feature.

Impact Damage Behavior of Glass/Epoxy Laminates for Railway Vehicle at Low Temperature

2006 ◽  
Vol 326-328 ◽  
pp. 1793-1796
Author(s):  
Ki Weon Kang ◽  
Seung Yong Yang ◽  
J.H. Kim ◽  
Jung Kyu Kim ◽  
Heung Seob Kim ◽  
...  
Keyword(s):  
Composite Laminates ◽  
Impact Damage ◽  
Testing Machine ◽  
Impact Testing ◽  
Low Velocity Impact ◽  
Railway Vehicle ◽  
Low Velocity ◽  
Damage Resistance ◽  
Damage Behavior ◽  
The Impact

This paper deals with the damage behavior of glass/epoxy composite laminates subjected to low-velocity impact at various temperatures. For this goal, the impact tests were performed by using an instrumented impact-testing machine at three temperatures: +20°C, -10°C and -40°C. And the resultant damages were inspected through the scanning acoustic microscope (SAM). Also, based on the impact force history and the damage configuration of the laminates, the impact resistance parameters were employed to evaluate damage resistance of glass/epoxy laminates. As results, it was found that the temperature changes affect the damage resistance capacity of glass/epoxy laminates.

Shape and size effects of ceria nanoparticles on the impact strength of ceria/epoxy resin composites

Particuology ◽  
2011 ◽  
Vol 9 (1) ◽  
pp. 80-85 ◽  
Author(s):  
Xiaoqiang He ◽  
Dengsong Zhang ◽  
Hongrui Li ◽  
Jianhui Fang ◽  
Liyi Shi
Keyword(s):  
Impact Strength ◽  
Epoxy Resin ◽  
Size Effects ◽  
Resin Composites ◽  
Ceria Nanoparticles ◽  
Epoxy Resin Composites ◽  
The Impact ◽  
Shape And Size

Preparation and Mechanical Properties of Lignin/Epoxy Resin Composites

2012 ◽  
Vol 482-484 ◽  
pp. 1959-1962 ◽  
Author(s):  
Quan Fu Yin ◽  
Ming Wei Di
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Epoxy Resin ◽  
Bending Strength ◽  
Resin Composites ◽  
Ftir Analysis ◽  
Opposite Trend ◽  
Bonding Effect ◽  
Epoxy Resin Composites ◽  
The Impact

Lignin/epoxy resin composites were prepared by blending lignin with epoxy resin cured by polyamide. The effect of the content of lignin and polyamide on the mechanical properties of the lignin/epoxy resin composites was studied systemically. And the structure for the blend of lignin and epoxy resin without the curing agent was characterized by Fourier transform infrared spectroscopy (FTIR). The results of mechanical properties test showed that the bending strength of the composites decreases gradually with increasing the content of lignin, while the impact strength increased firstly and then decreased. The bending strength of lignin/epoxy resin composites showed a trend of increasing firstly and then decreasing with the increase of the content of polyamide, while the impact strength exhibited an opposite trend. The density for the composites increased with the addition of lignin, and polyamide exhibited an inconspicuous effect on density of the composites. The FTIR analysis results showed that the epoxy resin could be cured by lignin without polyamide, which concluded that the lignin could catalyze the cross-linking of epoxy resin or react with epoxy resin, and this bonding effect would beneficial to the properties of lignin/epoxy resin composites.

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