scholarly journals The Laser Interlaminar Reinforcement of Continuous Glass Fiber Composites

2015 ◽  
Vol 137 (6) ◽  
Author(s):  
Dakai Bian ◽  
Gen Satoh ◽  
Y. Lawrence Yao
Keyword(s):  
Crack Arrest ◽  
Glass Fabric ◽  
Reinforced Composites ◽  
Focal Volume ◽  
Laminate Composites ◽  
Glass Fiber Composites ◽  
Coupled Heat Transfer ◽  
Major Mode ◽  
Delamination Resistance ◽  
Interlaminar Crack

Interlaminar crack initiation and propagation are a major mode of failure in laminate fiber reinforced composites. A laser reinforcement process is developed to bond layers of glass fabric prior to the vacuum-assisted transfer molding of laminate composites. Glass fabric layers are bonded by fusing a dense glass bead to fibers within the laser focal volume, forming a 3D reinforcement architecture. Coupled heat transfer and viscous flow modeling is used to capture the temperature and morphology evolution of glass during the reinforcement process under experimentally observed conditions. Mode I double cantilever beam (DCB) testing is performed to quantify the effects of laser interlaminar reinforcements on composite delamination resistance. Postmortem high-resolution imaging of the fracture surface is used to characterize the toughening mechanism of the interlaminar reinforcements. Improved delamination resistance of laser reinforced composites derives from crack arrest and deflection mechanisms, showing a positive correlation to the reinforcement thickness.

The Influence of Recycling On Thermotropic Liquid Crystalline Polymer and Glass Fiber Composites

2021 ◽  
Author(s):  
Tianran Chen
Keyword(s):  
High Performance ◽  
Liquid Crystalline ◽  
Tensile Modulus ◽  
Crystalline Polymer ◽  
Fiber Composites ◽  
Reinforced Composites ◽  
Recycling Process ◽  
Mechanical Recycling ◽  
Glass Fiber Composites ◽  
Pp Composites

In this paper, high-performance thermotropic liquidcrystalline polymer (TLCP)/polypropylene (PP) and glassfiber (GF)/PP composites were prepared by the injectionmolding process. Mechanical recycling of TLCP/PP andGF/PP composites consisted of grinding of the injectionmolded specimens and further injection molding of thegranules. The influence of mechanical recycling onmechanical and thermal properties was investigated. In situTLCP/PP maintains tensile modulus and strength duringthe recycling process, indicating the regeneration ofpolymeric fibrils at each reprocessing stage. GF/PPcomposite exhibits deterioration of mechanical propertiesafter recycling because of fiber breakage during processing,which is a very common issue on reusing glass or carbonfiber reinforced composites. The experimental resultsreveal that the TLCP/PP composite has better recyclabilitythan GF/PP.

Prediction of Thermal Conductivities of Fibre Reinforced Composites using a Thermal-Electrical Analogy

2005 ◽  
Vol 13 (6) ◽  
pp. 637-644
Author(s):  
Young Jun Cho ◽  
Jae Ryoun Youn ◽  
Tae Jin Kang ◽  
Sung Min Kim
Keyword(s):  
Fibre Orientation ◽  
Reinforced Composites ◽  
Laminate Composites ◽  
Reinforced Composite ◽  
Electrical Analogy ◽  
Out Of Plane ◽  
Predicted Values ◽  
Fibre Reinforced Composites ◽  
Good Agreement ◽  
Thermal Conductivities

An approach for predicting the effective thermal conductivities of fibre reinforced composites has been developed, based on a thermal-electrical analogy. In the voxelization method, the unit cell of the laminate composites is divided into a number of volume elements, and the material properties considering the local variations of fibre orientation have been given to each element. By constructing a series-parallel thermal resistance network, the thermal conductivities of a fibre reinforced composite in both in-plane and out-of-plane directions have been predicted. The reported thermal conductivities of a graphite/epoxy composite of a balanced plain weave laminate were used for the comparison with the predicted values of the model, and good agreement was found.

Effect of UHMWPE Microparticles on the Tribological Performances of High-Strength Glass Fabric/Phenolic Laminate Composites Under Water Lubrication

2014 ◽  
Vol 55 (2) ◽  
pp. 253-260 ◽  
Author(s):  
Ning Liu ◽  
Jianzhang Wang ◽  
Beibei Chen ◽  
Gaofeng Han ◽  
Fengyuan Yan
Keyword(s):  
High Strength ◽  
Water Lubrication ◽  
Glass Fabric ◽  
Laminate Composites

A Study on Improvement of Fatigue Life for Woven Glass Fabric/Epoxy Laminate Composite Applied to Railway Vehicle

2010 ◽  
Vol 654-656 ◽  
pp. 2583-2586
Author(s):  
Hee Young Ko ◽  
Kwang Bok Shin ◽  
Jung Seok Kim
Keyword(s):  
Fatigue Life ◽  
Fatigue Test ◽  
Stress Ratio ◽  
Laminate Composite ◽  
Glass Fabric ◽  
Railway Vehicle ◽  
Test Results ◽  
Laminate Composites ◽  
Remarkable Improvement ◽  
Fatigue Characteristics

In this study, the fatigue characteristics and life of woven glass fabric/epoxy laminate composites applied to railway vehicle were evaluated. The fatigue test was conducted by tension-tension load with stress ratio R of 0.1 and frequency of 5Hz. The material used to fatigue test was two types of woven glass fabric/epoxy laminate composite with and without the reinforcement of carbon/epoxy ply. Also, the fatigue life of woven glass fabric/epoxy laminate composite was compared with that of aluminum 6005 used to the car-body and under-frame structures of railway vehicle. The test results showed that the failure strength and life of woven glass fabric/epoxy laminate composite with the reinforcement of three carbon/epoxy plies had a remarkable improvement in comparison with that of bare specimen without reinforcement.

scholarly journals The Thermal Behavior of Hybrid Fabric Reinforced Composites with Stratified Filled Epoxy Matrix

2018 ◽  
Vol 55 (2) ◽  
pp. 161-167
Author(s):  
Victorita Stefanescu ◽  
Ana Boboc ◽  
A. Cojan ◽  
R. Bosoanca ◽  
cristian Muntenita ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Thermal Properties ◽  
Epoxy Matrix ◽  
Hybrid Composites ◽  
Epoxy Composites ◽  
Glass Fabric ◽  
Reinforced Composites ◽  
Specific Density ◽  
Modified Epoxy ◽  
Hybrid Fabric

In this research, the thermal performance of the hybrid composites with modified epoxy matrix was investigated. The results were compared with those presented by the hybrid composites with homogeneous epoxy matrix. For understand the effects of the replacement of lower specific density glass fabric by higher specific density glass fabric, the thermal properties of the hybrid epoxy composites were determined by comparison to the thermal results of composites reinforced with lower specific density glass fabric with those of the hybrid epoxy materials reinforced with higher specific density glass fabric. Also, the effects on the specific heat and thermal expansion coefficient of the used fabric types in outer sheets of the composites were studied.

Composites

1983 ◽  
pp. 413-463
Author(s):  
M. B. Kasen
Keyword(s):  
Composite Materials ◽  
Low Pressure ◽  
Concrete Aggregate ◽  
Reinforced Composites ◽  
Cryogenic Temperatures ◽  
Laminate Composites ◽  
Materials Properties ◽  
Cryogenic Technology ◽  
Composite Systems ◽  
Effects Of Radiation

Abstract Composite systems for cryogenic applications are discussed in this chapter. This chapter emphasizes filamentary-reinforced composites because they are the most widely used composite materials. It begins with a discussion on the approach to designing and fabricating with low-pressure laminate composites. This is followed by a section providing an overview of the materials in modern cryogenic technology. Then, the chapter describes the effect of cryogenic temperatures on materials properties; it also introduces the various joining techniques developed for composite materials. The effects of radiation on the properties of the materials are covered as well as the processes involved in testing laminates at cryogenic temperatures. Finally, the chapter provides information available on concrete aggregate composites.

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