Effects of Accelerated Aging Period of Time at 150°C on Tensile Strength of 3-Dimension-4-Direction Braided/Epoxy Resin Composites

2011 ◽  
Vol 399-401 ◽  
pp. 461-464
Author(s):  
Wei Geng ◽  
Lei Lei Song ◽  
Jia Lu Li
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Resin Composite ◽  
Accelerated Aging ◽  
Tensile Load ◽  
Resin Composites ◽  
Braided Composite ◽  
Aging Period ◽  
Epoxy Resin Composites ◽  
Composite Samples

In this paper, the tensile strength of 3-dimension-4-direction braided/epoxy resin composites after accelerated aging for different period of time at 150°C was investigated. The tensile tests of 3-dimension-4-direction braided/epoxy resin composite samples without aging and aged 60 hours, 120 hours, 180 hours, at 150°C were carried out. The damage forms of braided composite samples tested were investigated. The experiment result indicates that the accelerated aging process at 150°C has some effect on the tensile strength of braided composite samples. The average tensile strengths of composite samples aged 60 hours, 120 hours, and 180 hours period of time at 150°C are 92.44%, 91.62% and 84.91% of average tensile strength of braided composite samples without aging, respectively. This means that the tensile strength will be decreased when the aging period of time increases at 150°C. The damage form of samples tested shows that when accelerated aging, the resin in the composite samples is damaged, which makes the adhesive force between fiber bundles and epoxy resin decline, so that the ability of fiber and resin bearing the tensile load together decreases.

Effects of Accelerated Aging Period of Time at 180°C on Tensile Strength of 3-Dimension-4-Direction Braided/Epoxy Resin Composites

2011 ◽  
Vol 382 ◽  
pp. 312-315 ◽  
Author(s):  
Liang Sen Liu ◽  
Lei Lei Song ◽  
Jia Lu Li
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Resin Composite ◽  
Accelerated Aging ◽  
Tensile Tests ◽  
Resin Composites ◽  
Obvious Effect ◽  
Braided Composite ◽  
Epoxy Resin Composites ◽  
Composite Samples

The tensile strength of 3-dimension-4-direction braided/epoxy resin composites after accelerated aging for different period of time at 180°C was investigated. The tensile tests of 3-dimension-4-direction braided/epoxy resin composite samples without aging and aged 60 hours, 120 hours, 180 hours, at 180°C were carried out. The damage forms of braided composite samples tested were investigated. The experiment result indicates that the accelerated aging process at 180°C has obvious effect on the tensile strength of braided composite samples. The average tensile strengths of composite samples aged 60 hours, 120 hours, and 180 hours period of time at 180°C are 86.29%, 88.59% and 84.12% of average tensile strength of braided composite samples without aging, respectively. This means that the tensile strength of aged braided composites will be decreased. The damage form of samples tested shows that after aging for a long time at 180°C, the resin is damaged badly and becomes brittle which make the bonding force between fiber and resin decrease. This is the reason of the decrease of tensile strength of composites after accelerated aging at 180°C.

Effects of Accelerated Aging Period of Time at 150°C on Tensile Property of Plain Woven Fabric/Epoxy Resin Laminated Composites

2011 ◽  
Vol 282-283 ◽  
pp. 403-406 ◽  
Author(s):  
Lei Lei Song ◽  
Quan Rong Liu ◽  
Liang Sen Liu ◽  
Jia Lu Li
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Tensile Property ◽  
Resin Composite ◽  
Accelerated Aging ◽  
Tensile Load ◽  
Tensile Tests ◽  
Woven Fabric ◽  
Obvious Effect ◽  
Composite Samples

The purpose of this paper is to investigate the tensile property of laminated epoxy resin composites reinforced by carbon fiber plain woven fabric after accelerated aging for different period of time at 150°C. For this purpose, the tensile tests of laminated resin composite samples without aging and aged 60 hours, 120 hours, 180 hours, at 150°C were carried out. The damage forms of composite samples tested were investigated. The experiment result indicates that the accelerated aging process has an obvious effect on the tensile strength of composite samples. The average tensile strengths of composite samples aged 60 hours, 120 hours, and 180 hours period of time at 150°C are 87.31%, 88.61%, 79.05% of average tensile strength of composite samples without aging, respectively. The observation of the damage form of samples tested shows that when accelerated aging, the resin in the composite samples is damaged and the adhesive force between fiber bundles and epoxy resin decline, which makes the ability of fiber and resin bearing the tensile load together decreases.

Mechanical Properties of Hemp Fiber Composites with Carbon Nanotubes Reinforcement

2008 ◽  
Vol 55-57 ◽  
pp. 553-555
Author(s):  
Haruthai Longkullabutra ◽  
Wim Nhuapeng ◽  
Wandee Thamjaree ◽  
Tawee Tunkasiri
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Fiber Composites ◽  
Resin Composites ◽  
Hemp Fiber ◽  
Epoxy Resin Composites ◽  
Composite Samples

An experimental was investigated the condition of reinforcement of hemp fiber and hemp fiber/epoxy resin composites with carbon nanotubes (CNTs).The CNTs were mixed with several liquid such as ethanol, latex, water glue and epoxy resin. These mixtures were added to hemp fiber and prepared the hemp fiber/epoxy resin composites. The mechanical properties of both fiber and composite samples were measured. It was found that the mixture of epoxy resin and CNTs with CNTs ratio of 20 vol% in hemp fiber showed the highest tensile strength of 25.43 N. and the same mixture in hemp fiber/epoxy resin composites showed the highest tensile strength of 31.82 MPa and elongation of 7.40 %.

Fabrication and Mechanical Properties of Carbon Nanotubes/Epoxy Resin Composites Prepared by a Sonication Technique

2007 ◽  
Vol 353-358 ◽  
pp. 1374-1377
Author(s):  
Supreyak Kumfu ◽  
V. Chailangka ◽  
Wim Nhuapeng ◽  
Pisith Singjai
Keyword(s):  
Carbon Nanotubes ◽  
Tensile Strength ◽  
Wear Resistance ◽  
Epoxy Resin ◽  
Resin Composites ◽  
Sem Image ◽  
Mechanical And Physical Properties ◽  
Epoxy Resin Composites ◽  
Sonication Technique ◽  
Composite Samples

Carbon nanotubes (CNTs)/epoxy resin composites were prepared by using a sonication technique. Microstructure, mechanical and physical properties such as hardness, wear resistance, tensile strength and density of the composite samples were examined. The tensile strength of the 0.6 vol.% CNTs/epoxy resin composites compared with the monolithic epoxy resin increased 183%. The hardness and wear resistance were maximum at 0.8 vol.% CNTs. Moreover, SEM image of the composites indicated that there is good adhesion between CNTs and the epoxy resin.

Effects of Accelerated Aging Period of Time at 180°C on Tensile Property of Plain Woven Fabric/Epoxy Resin Laminated Composites

2012 ◽  
Vol 182-183 ◽  
pp. 76-79 ◽  
Author(s):  
Lei Lei Song ◽  
Quan Rong Liu ◽  
Jia Lu Li
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Epoxy Resin ◽  
Laminated Composites ◽  
Accelerated Aging ◽  
Woven Fabric ◽  
Accelerated Ageing ◽  
Time Intervals ◽  
Composite Samples

In this paper, carbon fiber reinforced resin matrix composites were produced by stacking eight pieces of carbon fiber woven plain fabric and subjected to accelerated ageing. Accelerated ageing was carried out in oven at 180°C for three different time intervals (60 hours, 120 hours and 180 hours). The influence of different ageing time intervals at 180°C on tensile properties of laminated composites was examined, compared with the composites without aging. The appearance and damage forms of these laminated composites were investigated. The results revealed that the tensile strength of the laminates declined significantly after long term accelerated aging at 180°C. The average tensile strengths of composite samples aged 60 hours, 120 hours, and 180 hours period of time at 180°C are 80.36%, 79.82%, 76.57% of average tensile strength of composite samples without aging, respectively. The high temperature accelerated aging makes the resin macromolecular structure in the composites changed, and then the adhesive force between fiber bundles and resin declines rapidly which result in the tensile strength of composites aged decrease. This research provides a useful reference for long term durability of laminated/epoxy resin composites.

Effects of Heating Period of Time on Tensile Property of Plain Woven Fabric/Epoxy Resin Laminated Composites at High Temperature

2010 ◽  
Vol 34-35 ◽  
pp. 1397-1401
Author(s):  
Guang Wei Chen ◽  
Gui Fang He ◽  
Jia Lu Li
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Epoxy Resin ◽  
Tensile Property ◽  
Laminated Composites ◽  
Tensile Load ◽  
Tensile Tests ◽  
Woven Fabric ◽  
Resin Composites ◽  
Heating Period

The purpose of this paper is to investigate the tensile property of laminated epoxy resin composites reinforced by carbon fiber plain woven fabric with different heating period of time at relatively high temperature. For this purpose, the tensile tests of laminated resin composites are carried out at 150°C and 180°C with 15 minutes, 10 hours and 30 hours heating period of time, respectively. The reasons for the variations of tensile property of these composites with different heating period of time at 150°C and 180°C are analyzed. At 150°C and 180 °C，with heating period of time increasing the tensile strength of samples keep the same level. However at 180 °C the average tensile strength of samples is decreased by 14.95% compared with that at 150°C and the variation coefficient (CV) of tensile strengths at 180°C is much more than that at 150°C. These show that the tensile strength of resin laminated composites is sensitive at high temperature, although the tensile strength of resin laminated composites keeps the same level at same temperature with different heating period of time. The reason of the tensile strength of resin laminated composites decreased at high temperature is that resin has been damaged，which losing the adhesion of fiber and resin, so that these make resin and fiber can not bear the tensile load together. The research results will provide a basic reference for the application of plain woven fabric reinforced laminated resin composites with long using period of time at high temperature.

scholarly journals Improved Wear-Resistant Performance of Epoxy Resin Composites Using Ceramic Particles

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 333
Author(s):  
Amal Nassar ◽  
Mona Younis ◽  
Mohamed Ismail ◽  
Eman Nassar
Keyword(s):  
Silicon Carbide ◽  
Wear Resistance ◽  
Epoxy Resin ◽  
Polymer Composite ◽  
Epoxy Composite ◽  
Resin Composites ◽  
Ceramic Particles ◽  
Kraft Paper ◽  
Epoxy Resin Composites ◽  
Composite Samples

This work investigated the effects of using a new fabrication technique to prepare polymer composite on the wear-resistant performance of epoxy resin composites under dry friction conditions. Polymer composite samples with different weight contents of silicon carbide (SiC) particles were manufactured. This paper addresses the wear behavior of the obtained samples. With the suggested technique, the samples were prepared from epoxy/silicon carbide particles using a layer of thin kraft paper to prevent the sedimentation of the ceramic particles and to control the weight content of ceramic in the polymer. Kraft paper was used as a layer in the polymer composite. The hardness, wear resistance, and water absorption capacity of the produced epoxy composite samples prepared using the kraft paper technique were evaluated. The morphology of epoxy composite samples showed a significant improvement in the ceramic distribution and enhancement of interface bonding between ceramic and the polymer. The hardness values of the developed polymer composites were enhanced by up to 42.8%, which was obtained at 18 wt.% SiC particles. Increasing the ceramic content in the epoxy also led to the enhancement of wear resistance compared with pure epoxy. The results of the microstructure study also showed that the kraft paper layers helped in maintaining the distribution of the ceramic particles according to the previously specified content in each layer in the sample. Wear tests showed that the wear rate of the polymer composite decreased with the increase in the ceramic content. This study provides a new recycling method for using old kraft paper in polymer composite manufacturing to improve the distribution of ceramic particles in the polymer matrix.

Study on Mechanical Properties of Multilayer Graphene/Epoxy Nanocomposites

2020 ◽  
Vol 846 ◽  
pp. 29-34
Author(s):  
Jen Ching Huang ◽  
Tsung Ching Lin
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Impact Test ◽  
Cooling System ◽  
Resin Composite ◽  
Multilayer Graphene ◽  
Resin Composites ◽  
Epoxy Resin Composites ◽  
Graphene Content ◽  
Coefficient Of Elasticity

In this paper, the implementation and testing of multilayer graphene/epoxy resin nanocomposites are discussed. Firstly, the epoxy resin hardener is mixed with the multilayer graphene, and then mixed with the main agent, then poured into the mold, and the low temperature cooling system is used. The curing time of the epoxy resin is slowed down, and the bubble is removed before the complete hardening by the vacuum defoaming method, and the mechanical properties such as tensile strength and toughness are compared with the pure epoxy resin after being sufficiently hardened. In this paper, we investigated the effect of multilayer graphene content on mechanical properties by using the tensile test and impact test. We discussed the effect of multilayer graphene content on the coefficient of elasticity of the multilayer graphene/epoxy resin composites at different stretching rates. And the toughness of the multilayer graphene/epoxy resin composites was evaluated by impact test. After the experiment, it was found that the stretching rate has a certain degree of influence on the grapheme/epoxy resin composite material. And that the addition of 2% multilayer graphene to epoxy resin had the best effect and could effectively improve the coefficient of elasticity and toughness.

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