A Study on Mechanical Properties of Short Carbon Fiber Reinforced Polycarbonate via an Injection Molding Process

2020 ◽  
Vol 18 (11) ◽  
pp. 801-805
Author(s):  
Kyung-Soo Jeon ◽  
R. Nirmala ◽  
Seong-Hwa Hong ◽  
Yong-II Chung ◽  
R. Navamathavan ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Testing Machine ◽  
Fiber Content ◽  
Injection Molding Process ◽  
Mechanical And Thermal Properties ◽  
Molding Process ◽  
Short Carbon Fiber ◽  
Short Carbon

This manuscript is dealt with the synthesis of short carbon fibers reinforced polycarbonate polymer composite by using injection modeling technique. Four different composite materials were obtained by varying the carbon fibers weight percentage of 10, 20, 30 and 40%. The synthesized carbon fibers/polycarbonate composites were characterized for their morphological, mechanical and thermal properties by means of scanning electron microscopy (SEM), universal testing machine (UTM) and IZOD strength test. The resultant carbon fibers/polycarbonate composites exhibited excellent interfacial adhesion between carbon fibers and polycarbonate resin. The tensile properties were observed to be monotonically increases with increasing carbon fiber content in the composite resin. The tensile strength of carbon fiber/polycarbonate composites with the carbon fiber content 40% were increased about 8 times than that of the pristine polycarbonate matrix. The carbon fibers/polycarbonate composites with 40 wt.% of short carbon fibers exhibited a high tensile strength and thermal conductivity. The incorporation of carbon fiber in to polycarbonate resin resulted in a significant enhancement in the mechanical and the thermal behavior. These studies suggested that the short carbon fiber incorporated polycarbonate composite matrix is a good candidate material for many technological applications.

scholarly journals Overmolding of Hybrid Long and Short Carbon Fiber Polypropylene Composite: Optimizing Processing Parameters

2021 ◽  
Vol 5 (4) ◽  
pp. 132
Author(s):  
Cahyo Budiyantoro ◽  
Heru S. B. Rochardjo ◽  
Gesang Nugroho
Keyword(s):  
Carbon Fiber ◽  
Impact Strength ◽  
Flexural Strength ◽  
Melting Temperature ◽  
Carbon Fibers ◽  
Volume Fraction ◽  
Injection Molding Process ◽  
Molding Process ◽  
Short Carbon Fiber ◽  
Short Carbon

Injection overmolding was used to produce hybrid unidirectional continuous-short carbon fiber reinforced polypropylene. Polypropylene pellets containing short carbon fibers were melted and overmolded on unidirectional carbon fibers, which act as the core of the composite structure. Four factors were varied in this study: fiber pretension applied to unidirectional fibers, injection pressure, melting temperature, and backpressure used for melting and injecting the composite pellet. This study aimed to evaluate the effect of these factors on fiber volume fraction, flexural strength, and impact strength of the hybrid composite. The relationship between factors and responses was analyzed using Box–Behnken Response Surface Methodology (RSM) and analysis of variance (ANOVA). Each aspect was divided into three levels. There were 27 experimental runs carried out, with three replicated center points. The results showed that the injection molding process parameters had no significant effect on the fiber’s volume fraction. On the other hand, melting temperature and fiber pretension significantly affected impact strength and flexural strength.

scholarly journals Absorption and Strength Properties of Short Carbon Fiber Reinforced Mortar Composite

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 300
Author(s):  
Md. Safiuddin ◽  
George Abdel-Sayed ◽  
Nataliya Hearn
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Water Absorption ◽  
Carbon Fibers ◽  
Strength Properties ◽  
Fiber Content ◽  
Test Results ◽  
Air Content ◽  
Entrapped Air ◽  
Short Carbon

This paper presents the water absorption and strength properties of short carbon fiber reinforced mortar (CFRM) composite. Four CFRM composites with 1%, 2%, 3%, and 4% short pitch-based carbon fibers were produced in this study. Normal Portland cement mortar (NCPM) was also prepared for use as the control mortar. The freshly mixed mortar composites were tested for workability, wet density, and entrapped air content. In addition, the hardened mortar composites were examined for compressive strength, splitting tensile strength, flexural strength, and water absorption at the ages of 7 and 28 days. The effects of different carbon fiber contents on the tested properties were observed. Test results showed that the incorporation of carbon fibers decreased the workability and wet density, but increased the entrapped air content in mortar composite. Most interestingly, the compressive strength of CFRM composite increased up to 3% carbon fiber content and then it declined significantly for 4% fiber content, depending on the workability and compaction of the mortar. In contrast, the splitting tensile strength and flexural strength of the CFRM composite increased for all fiber contents due to the greater cracking resistance and improved bond strength of the carbon fibers in the mortar. The presence of short pitch-based carbon fibers significantly strengthened the mortar by bridging the microcracks, resisting the propagation of these minute cracks, and impeding the growth of macrocracks. Furthermore, the water absorption of CFRM composite decreased up to 3% carbon fiber content and then it increased substantially for 4% fiber content, depending on the entrapped air content of the mortar. The overall test results suggest that the mortar with 3% carbon fibers is the optimum CFRM composite based on the tested properties.

Fracture Parameters of Short Carbon Fiber Reinforced Polycarbonate Composite Fabricated by Injection Molding Process

2015 ◽  
Vol 776 ◽  
pp. 186-192
Author(s):  
Myung Goo Hwang ◽  
Gin Ho Kim ◽  
Han Ju Park ◽  
Yong Gon Lee ◽  
Cheol Min Yang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Injection Molding ◽  
Carbon Fibers ◽  
Weld Line ◽  
Micro Ct ◽  
Fiber Reinforced ◽  
Short Carbon Fiber ◽  
Injection Process ◽  
Carbon Fiber Reinforced ◽  
Short Carbon

This paper investigated the fracture behavior of the unavoidable breakage of carbon fibers and fiber orientation of short carbon fiber reinforced polycarbonate composite in injection process. In this experiment, short carbon fiber mixed compound of 1mm, 3mm, 5mm, 7mm length with 10wt.%, 15wt.%, 20wt.% in polycarbonate for injection molding were produced through the extruder. The dumbbell specimens for tensile evaluation were made by injection molding. The parent specimens were made by double gate method, the weld specimens were made by single gate method which was controlled by inserting a stopper through the runner of the mold cavity. Short carbon fiber reinforced PC composite was evaluated by micro-CT with regard to the particle size of short fiber with a diversified quantitative analysis through entire process of the injection process in composite. The quantitative distribution of fiber orientation was also examined by micro-CT with regard to normal direction or anisotropy. Weld line of short carbon fibers reinforced PC composite weaken the bonding strength by 50% compared to parent materials because the weld line is composed with concentrated anisotropy orientation of short carbon fiber in weld line. Evaluation of the mechanical properties of the injection specimens group was utilized by universal tensile strength tester. In addition, fracture surface of parent and weld materials was investigated by a SEM.

scholarly journals The Evolution of Interfacial Microstructure and Fracture Behavior of Short Carbon Fiber Reinforced 2024 Al Composites at High Temperature

2019 ◽  
Vol 9 (17) ◽  
pp. 3477
Author(s):  
Chi Zhang ◽  
Jinhao Wu ◽  
Qingnan Meng ◽  
Youhong Sun ◽  
Mao Wen
Keyword(s):  
Carbon Fiber ◽  
Fracture Surface ◽  
Fracture Behavior ◽  
Room Temperature ◽  
Aluminum Matrix ◽  
Interfacial Microstructure ◽  
Fiber Content ◽  
Fiber Reinforced ◽  
Short Carbon Fiber ◽  
Short Carbon

The short carbon fiber reinforced 2024 Al composites were fabricated through powder metallurgy. The effect of short carbon fiber content on the interfacial microstructure and fracture behavior of the composites at different temperatures were investigated. The results showed that the dislocation accumulation was formed in the aluminum matrix due to the thermal expansion mismatch between carbon fiber and aluminum matrix. With the testing temperature increasing, the size of interfacial product Al4C3 and precipitates Al2Cu became larger, and the segregation of Al2Cu was found coarsening around Al4C3. The addition of short carbon fiber improved the hardness and modulus of the aluminum matrix in the vicinity of the interface between carbon fiber and aluminum matrix. Compared to the matrix 2024 Al, the yield strength and ultimate tensile strength of the composites first increased and then decreased with increasing short carbon fiber content at room temperature 423 Kand 523 K. The fracture surface of the composites at room temperature was characterized by shear failure of fiber, while the interface debonding and fiber pulled-out became predominant fracture morphologies for the fracture surface at increased temperatures.

Influence of short carbon fiber content on thermal properties of polyethersulfone composites

2020 ◽  
Author(s):  
B. Harshavardhan ◽  
R. Ravishankar ◽  
B. Suresha ◽  
S. Srinivas ◽  
U. Arun C. Dixit
Keyword(s):  
Thermal Properties ◽  
Carbon Fiber ◽  
Fiber Content ◽  
Short Carbon Fiber ◽  
Short Carbon

Preparation of Carbon Fiber Reinforced Geopolymer Composites

2014 ◽  
Vol 1081 ◽  
pp. 275-278
Author(s):  
Le Ping Liu ◽  
He Zhu ◽  
Yan He ◽  
Xue Min Cui
Keyword(s):  
Electrical Conductivity ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Water Glass ◽  
Fiber Content ◽  
Fiber Reinforced ◽  
Geopolymer Matrix ◽  
Carbon Fiber Reinforced ◽  
Short Carbon ◽  
Geopolymer Composites

The carbon fiber reinforced geopolymer composites were synthesized with metakaolin, water glass and short carbon fibers. The surface treatment short carbon fibers are homogeneously distributed in the geopolymer matrix. The composites exhibit excellent mechanical properties and electrical conductivity. The flexural strength of the Cf /geopolymer composites reached 27 MPa with carbon fiber content of 2.78 %, and its electrical conductivity are increased from 10-5 to 10-1 S.m-1. However, when the carbon fiber content exceeded 4.15 %, the conductivity of the composites kept a constant.

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