Tensile Test of the Fireproof Lining of Tunnel

2011 ◽  
Vol 255-260 ◽  
pp. 170-173 ◽  
Author(s):  
Rong Yao ◽  
Dong Ling Peng ◽  
Hong Yuan Huang
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Tensile Test ◽  
Strength Loss ◽  
Maximum Temperature ◽  
Textile Fiber ◽  
Resistance Furnace ◽  
Orthogonal Method ◽  
Custom Made ◽  
Test Result

The tensile fireproof lining of tunnel test has been done in orthogonal method with a custom-made fast fluctuation thermostat type resistance furnace which the maximum temperature may arrive 1200 °C , the heater was put for heating by choosing the RABT curve, the test result was analyzed, the ratio of tensile strength loss is changed with the meter of the polypropylene textile fiber, the silica flour and the carbon fiber, there is a optimality proportion when the ratio of tensile strength loss is low.

Compression Test of Lining of Tunnel Fireproof Concretes

2011 ◽  
Vol 243-249 ◽  
pp. 3381-3384 ◽  
Author(s):  
Rong Yao ◽  
Dong Ling Peng ◽  
Hong Yuan Huang
Keyword(s):  
Compressive Strength ◽  
Carbon Fiber ◽  
Compression Test ◽  
Strength Loss ◽  
Textile Fiber ◽  
Test Result

The polypropylene, the silica flour and the carbon fiber will be considered to be added into the concrete when test, the orthogonal theory is used in this test, 32 groups samples were made, the heater was put for heating by choosing the RABT curve, the test result was analyzed, the ratio of compressive strength loss is changed with the meter of the polypropylene textile fiber, the silica flour and the carbon fiber, there is a optimality Proportion when the ratio of compressive strength loss is low.

Design and development of aluminum alloy 6061-T6 pressure vessel liner for aerospace applications: A technical brief

2021 ◽  
pp. 146442072110651
Author(s):  
R Pramod ◽  
N Siva Shanmugam ◽  
C K Krishnadasan ◽  
G Radhakrishnan ◽  
Manu Thomas
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Weld Metal ◽  
Tensile Test ◽  
Pressure Vessel ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Aluminum Alloy 6061 ◽  
Custom Made ◽  
Alloy 6061

This work mainly focuses on designing a novel aluminum alloy 6061-T6 pressure vessel liner intended for use in launch vehicles. Fabrication of custom-made welding fixtures for the assembly of liner parts, namely two hemispherical domes and end boss, is illustrated. The parts of the liner are joined using the cold metal transfer welding process, and the welding trials are performed to arrive at an optimized parametric range. The metallurgical characterization of weld joint reveals the existence of dendritic structures (equiaxed and columnar). Microhardness of base and weld metal was 70 and 65 HV, respectively. The tensile strength of base and weld metal was 290 and 197 MPa, respectively, yielding a joint efficiency of 68%. Finite-element analysis of a uniaxial tensile test was performed to predict the tensile strength and location of the fracture in base and weld metal. The experimental and predicted tensile test results were found to be in good agreement.

Interfacial Properties of Carbon Fiber Reinforced Thermoplastic and Thermosetting Composites

2014 ◽  
Author(s):  
Toshi Sugahara ◽  
Yan Ma ◽  
Suchalinee Mathurosemontri ◽  
Hiroyuki Hamada ◽  
Yuqiu Yang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Carbon Fiber ◽  
Tensile Test ◽  
Interfacial Properties ◽  
Ultimate Strain ◽  
Gage Length ◽  
Carbon Fiber Composites ◽  
Fiber Sheet ◽  
Carbon Fiber Sheet

Carbon fiber composites are getting more and more widely used in aeronautics and astronautics, vessels, blades of wind turbine generators and so on. In this study, carbon fabric as reinforcement and thermoplastic and thermosetting resin as matrix were used to manufacture carbon fiber prepreg to mold the unidirectional carbon fiber sheet composite (Carbon/PA6 and Carbon/Epoxy). Specially, the multi-tensile tests of 90 degree carbon fiber sheet composite specimens with 150 mm gage length were carried out. After the 1st trial, the longer part of the fracture specimen was chosen as the experimental specimen of 2nd trial tensile test. Similarly, the 3rd trial was investigated. The mechanical properties of 90 specimens including tensile strength, elastic modulus and ultimate stain of polished specimens were investigated in the primary research. Then, the effect of trial on the mechanical properties, the comparison of failure probability distribution of ultimate strain of trials, the relation between gage length and tensile strength, tensile strength and ultimate strain were discussed according to the multi-tensile test result of each specimen. Additionally, the interfacial properties were discussed based on the SEM observation on the fracture surface.

Model Test of Lining of Tunnel Fireproof Concretes

2012 ◽  
Vol 174-177 ◽  
pp. 1537-1540
Author(s):  
Hong Yuan Huang ◽  
Yao Rong
Keyword(s):  
Compressive Strength ◽  
Carbon Fiber ◽  
Model Test ◽  
Model Tests ◽  
Textile Fiber ◽  
Reasonable Proportion ◽  
The Common ◽  
Test Result

The model tests have been done to verified the reasonable proportion of the fireproof concretes; the test result was analyzed, the compressive strength of the fireproof concretes after heating higher than the common concretes, the fireproof concretes which admixed with the polypropylene textile fiber, the silica flour and the carbon fiber can prevent the blowout of the concretes.

A Study on the Tensile Strength and Thermal Property of CFRP Using Infrared Thermography Camera

2014 ◽  
Vol 1016 ◽  
pp. 140-144
Author(s):  
Hee Jae Shin ◽  
In Pyo Cha ◽  
Min Sang Lee ◽  
Tae Ho Kim ◽  
Hyun Kyung Yun ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Tensile Test ◽  
Thermal Imaging ◽  
Fiber Orientation ◽  
Thermal Characteristics ◽  
Orientation Angle ◽  
Maximum Temperature ◽  
Reinforced Composite ◽  
Imaging Camera ◽  
Fiber Orientation Angle

The fiber is considered the most important element in fiber reinforced composite materials, as it generally occupies the largest volume in a composite material; further, delivers the heaviest loads. therefore, it is important to select types, quantity and proper stacking angles of the fiber. In this study, the fiber directions were arranged in different orientation angles, i.e. in symmetric (0°/0°,15°/15°,30°/30°,45°/45°,90°/90°) and asymmetric (0°/15°,0°/30°,0°/45°,0°/90°), to analyze the tensile strengths depending on the fiber orientation angles through the tensile test. In addition, a thermal imaging camera was used to investigate the thermal characteristics of the test specimens generated during the tensile test. the tensile strength showed a tendency of decreasing while the orientation angle increased. the maximum temperature generated when the fracture occurred increased at the fiber orientation angle of 30°, and showed a tendency of decreasing as the orientation angle increased.

The analysis of strength and fracture morphology of Al-Si compound made from moulding sand formulation with bentonite binding material and Portland cement

2018 ◽  
Vol 1 (89) ◽  
pp. 5-12
Author(s):  
F Andoko ◽  
P. Puspitasari ◽  
F. Gapsari
Keyword(s):  
Tensile Strength ◽  
Impact Toughness ◽  
Portland Cement ◽  
Tensile Test ◽  
Fracture Morphology ◽  
Binding Material ◽  
Compound Casting ◽  
Optimum Formulation ◽  
Moulding Sand ◽  
Test Result

Purpose: This research aimed to analyse the casting result of Al-Si compound used formulation of moulding sand with bentonite binding material and Portland cement. Design/methodology/approach: Bentonite binding material’s type consisted of swelling (Na-bentonite) and non-swelling (Ca-bentonite). Optimum formulation of the moulding sand was 4% of swelling bentonite and 6% of Portland cement, 6% of non-swelling bentonite and 4% of Portland cement. The optimum formulation result of molding sand with bentonite binding material and Portland cement was used in Al-Si compound casting. The result of Al-Si compound casting strength was examined which in terms of its tensile strength, toughness, and hardness. Besides the three tests, the result was also supported by the fracture shape morphology of tensile test and impact toughness test result. Based on the Al-Si compound tensile test result, it was found that the best value was obtained when using 105.52 MPa of swelling bentonite. Findings: The impact toughness test result presented that the use of non-swelling bentonite produced better toughness value which was 0.00592 J/hour while the mickroVickers hardness test result showed that Al-Si compound result using non-swelling bentonite produced 111.04 HV hardness. Based on the fracture morphology test result using SEM of Al-Si compound casting result using swelling and non-swelling bentonite after being tested its tensile strength and impact toughness showed that the same fracture which was brittle fracture tended to appear. Research limitations/implications: In this casting process, combination which is being used is bentonite (swelling and non-swelling) and Portland cement as mould sand binding material. Practical implications: The combination can be used to find the bentonite type that can produce binding material formula with high binding level which can minimize defects on the resulted casting products. Originality/value: In this study swelling and non-swelling bentonite mixed with certain level of Portland cement combination are used.

scholarly journals Ultrasonic Imaging of Thick Carbon Fiber Reinforced Polymers through Pulse-Compression-Based Phased Array

2021 ◽  
Vol 11 (4) ◽  
pp. 1508
Author(s):  
Muhammad Khalid Rizwan ◽  
Stefano Laureti ◽  
Hubert Mooshofer ◽  
Matthias Goldammer ◽  
Marco Ricci
Keyword(s):  
Carbon Fiber ◽  
Pulse Compression ◽  
Phased Array ◽  
Signal To Noise Ratio ◽  
Near Field ◽  
Ultrasonic Imaging ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Custom Made ◽  
Carbon Fiber Reinforced

The use of pulse-compression in ultrasonic non-destructive testing has assured, in various applications, a significant improvement in the signal-to-noise ratio. In this work, the technique is combined with linear phased array to improve the sensitivity and resolution in the ultrasonic imaging of highly attenuating and scattering materials. A series of tests were conducted on a 60 mm thick carbon fiber reinforced polymer benchmark sample with known defects using a custom-made pulse-compression-based phased array system. Sector scan and total focusing method images of the sample were obtained with the developed system and were compared with those reconstructed by using a commercial pulse-echo phased array system. While an almost identical sensitivity was found in the near field, the pulse-compression-based system surpassed the standard one in the far-field producing a more accurate imaging of the deepest defects and of the backwall of the sample.

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.

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