Experiment Study of BFRP Bars’ Mechanical Properties

2012 ◽  
Vol 174-177 ◽  
pp. 830-833 ◽  
Author(s):  
Bao Rong Huo ◽  
Xiang Dong Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Mechanical Performance ◽  
Steel Wire ◽  
Tensile Tests ◽  
Test Methods ◽  
National Standards ◽  
Steel Cable ◽  
Tensile Elastic Modulus

The testing rule of mechanical properties of material can be established and the mechanical performance can be found by studying the basic mechanical properties of BFRP bars. Using the opressive sleeve anchor developed by the researchers,tensile tests of BFRP bars are carried out according to the national standards of “GFRP bar tensile test methods”.The BFRP bar’s force-deformation curve is linear before the force-deformation relationship is destroyed,therefore,referring to steel wire or steel cable,the BFRP bar’s reliable strength is suggested to be approximately 80% of its ultimate tensile strength. The BFRP bar’s tensile elastic modulus is related to the content of basalt fiber.The tensile elastic modulus increases with the increase of the basalt fiber’s content and the content increases when the BFRP bar’s diameter becomes longer, so the tensile elastic modulus increases with the increase of its diameter. Compared with steel, the BFRP bar is obviously superior in the aspects of tensile strength, corrosion resistance ,etc,therefore to use the BFRP bar in reinforced concrete structures insead of steel is feasible.

Research on Tensile Mechanical Properties of GFRP Rebar after High Temperature

2011 ◽  
Vol 181-182 ◽  
pp. 349-354 ◽  
Author(s):  
Ya Nan Fu ◽  
Jun Zhao ◽  
Ya Li Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
High Temperature ◽  
Test Section ◽  
Tensile Tests ◽  
Tensile Elastic Modulus ◽  
Temperature Test

By tensile tests on GFRP rebar after high temperature, the change regularity and influent factor are analyzed. The results show that: With the temperature increasing, vitrification, carbonization, decomposition at high temperature test section of the GFRP rebar are aggravating , and their mechanical properties are deteriorating. At the same time, the limited tensile strength and ultimate tensile elastic modulus decreased in different degree.

Test Methods for Mechanical Properties of Structural Adhesives

2010 ◽  
Vol 97-101 ◽  
pp. 814-817 ◽  
Author(s):  
Jun Deng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Shear Strength ◽  
Elastic Modulus ◽  
Butt Joint ◽  
Test Methods ◽  
Joint Specimen ◽  
Lap Shear ◽  
Better Than

One of the greatest drawbacks to predicting the behaviour of bonded joints has been the lack of reliable data on the mechanical properties of adhesives. In this study, methods for determining mechanical properties of structural adhesive were discussed. The Young’s modulus, Poisson’s ratio and tensile strength of the adhesive were tested by dogbone specimens (bulk form) and butt joint specimens (in situ form). The shear modulus and shear strength were test by V-notched specimens (bulk form) and thick adherend lap-shear (TALS) joint specimens (in situ form). The test results show that the elastic modulus provided by the manufacturer is too low, the dogbone specimen is better than the butt joint specimen to test the tensile strength and elastic modulus and the TALS joint specimen is better than the V-notched specimen to test the shear strength.

scholarly journals Mechanical Properties of Sigma 1140+ Sic Fibres Prior and after Composite Processing

2000 ◽  
Vol 9 (4) ◽  
pp. 096369350000900 ◽  
Author(s):  
C. Gonzalez ◽  
J. Llorca
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Elastic Modulus ◽  
Weibull Modulus ◽  
Fibre Diameter ◽  
Tensile Tests ◽  
Fibre Strength ◽  
Composite Processing ◽  
Scanning Electron

The effect of processing on the mechanical properties of Sigma 1140+ SiC fibres was studied through tensile tests carried out on pristine Sigma 1140+ SiC fibres and on fibres extracted from a Ti-6A1-4V-matrix composite. The elastic modulus and the tensile strength were computed after measuring carefully the fibre diameter. The characteristic fibre strength was reduced by 20% and the Weibull modulus by half during composite processing. The analysis of the fracture surfaces in the scanning electron microscope showed that the strength-limiting defects were located around the tungsten core in pristine fibres and predominantly at the surface in fibres extracted from the composite panels. These latter defects were nucleated by the mechanical stresses generated on the fibres during the panel consolidation.

scholarly journals Incidence of mercerization treatment in the mechanical properties of bamboo fibre bundles "Guadua Angustifolia Kunth" from colombian origin

DYNA ◽  
2019 ◽  
Vol 86 (210) ◽  
pp. 156-163 ◽  
Author(s):  
Leidy Johana Quintero Giraldo ◽  
Luis Javier Cruz ◽  
Jaime Alexis García ◽  
Alejandro Alcaraz ◽  
Eugenia González ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Tensile Tests ◽  
Good Correspondence ◽  
Fibre Bundles ◽  
Bamboo Fibre ◽  
Untreated Fibre ◽  
Mercerization Treatment ◽  
Mechanical Extraction

In this article, bamboo fibre bundles of "Guadua Angustifolia Kunth" specie were isolated from different locations of the basa zone: upper, middle and lower, through mechanical extraction method. The elastic modulus and the tensile strength were obtained with preliminary tensile tests. Applying the statistical analysis known as ANOVA, it was determined that the mechanical properties are similar in all the extension of the basa zone. From there, fibre bundles were extracted randomly, and a part of the fibre bundles was treated with NaOH (mercerization). Later, tensile tests with different calibration lengths were made for calculate the elastic modulus and the tensile strength of the treated and untreated fibre bundles. Best results belonged to the treated fibre bundles. A good correspondence between the results obtained in this work and the results reported in the literature was concluded. 

Study on the Effects of the Self-Healing Microcapsules on the Tensile Properties of Polymer Composite

2011 ◽  
Vol 299-300 ◽  
pp. 460-465 ◽  
Author(s):  
Li Zhang ◽  
Xiu Ping Dong ◽  
Hao Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Glass Fiber ◽  
Tensile Properties ◽  
Polymer Composite ◽  
Tensile Tests ◽  
The Self ◽  
Self Healing ◽  
Glass Fiber Reinforced

By designing different formulations of composites and adopting optimized technology including extrusion and molding, the different composites with various content microcapsules were prepared. The results of the tensile tests show that with the increasing content of self-healing microcapsules in the glass fiber reinforced nylon composites, the mechanical properties of the composites will change, i.e. tensile strength, elastic modulus will decrease. But there is little effect on the mechanical properties of the composite gears if the content of self-healing microcapsules is less than 3.5%, and the technology of self-healing microcapsules used in the polymer composite gear is feasible.

scholarly journals Mechanical properties of blueberry stems

2018 ◽  
Vol 64 (No. 4) ◽  
pp. 202-208
Author(s):  
Margus Arak ◽  
Kaarel Soots ◽  
Marge Starast ◽  
Jüri Olt
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Structural Parameters ◽  
Tensile Tests ◽  
Measuring Instrument ◽  
Test Results ◽  
Average Value ◽  
Agricultural Machines

In order to model and optimise the structural parameters of the working parts of agricultural machines, including harvesting machines, the mechanical properties of the culture harvested must be known. The purpose of this article is to determine the mechanical properties of the blueberry plant’s stem; more precisely the tensile strength and consequent elastic modulus E. In order to achieve this goal, the measuring instrument Instron 5969L2610 was used and accompanying software BlueHill 3 was used for analysing the test results. The tested blueberry plant’s stems were collected from the blueberry plantation of the Farm Marjasoo. The diameters of the stems were measured, test units were prepared, tensile tests were performed, tensile strength was determined and the elastic modulus was obtained. Average value of the elastic modulus of the blueberry (Northblue) plant’s stem remained in the range of 1268.27–1297.73 MPa.

Durable and Highly Dissipative Fibrous Composites for Strengthening Coastal Military Constructions

2021 ◽  
Vol 893 ◽  
pp. 75-83
Author(s):  
Cesare Signorini
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
High Resistance ◽  
Mechanical Performance ◽  
Fibrous Composite ◽  
Degradation Process ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
Viable Solution ◽  
Organic Fibre

Reinforced concrete strategic structures for military purposes are often established in coastalor offshore areas, widely subjected to chemical attacks, mainly due to an aggressive saline and acidenvironments. Porosity of cementitious conglomerates favour penetration of chlorides, which tend tocorrode the internal metallic rebar. The reinforcement of structures with fibrous composite materialsis a viable solution to restore the initial requirements of the building, especially when it exerts defence purposes. Among synthetic fibres, polyphenylenebenzobisoxazole (PBO) is an organic fibre based on linked aromatic structures with high elastic modulus and tensile strength and highly dissipative attitudes. In this work, the assessment of durability of continuous fibrereinforced cementitious mortar (FRCM) composites is carried out comparing the mechanical performance of laminates subjected to uniaxial tensile tests. It is found that PBOFRCM presents high resistance against aggressive environments and specifically preserve its mechanical strength in the presence of saltwater, where other reinforcing materials undergo to a dramatic degradation process.

scholarly journals Mechanical Properties of Human Dura Mater in Tension – An Analysis at an Age Range of 2 to 94 Years

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Johann Zwirner ◽  
Mario Scholze ◽  
John Neil Waddell ◽  
Benjamin Ondruschka ◽  
Niels Hammer
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Dura Mater ◽  
Human Head ◽  
Middle Meningeal Artery ◽  
Tensile Tests ◽  
Image Correlation ◽  
Tensile Data ◽  
Static Conditions

Abstract Realistic human head models are of great interest in traumatic brain injury research and in the forensic pathology courtroom and teaching. Due to a lack of biomechanical data, the human dura mater is underrepresented in head models. This study provides tensile data of 73 fresh human cranial dura mater samples retrieved from an area between the anterior middle and the posterior middle meningeal artery. Tissues were adapted to their native water content using the osmotic stress technique. Tensile tests were conducted under quasi-static uniaxial testing conditions with simultaneous digital image correlation. Human temporal dura mater is mechanically highly variable with regards to its elastic modulus of 70 ± 44 MPa, tensile strength of 7 ± 4 MPa, and maximum strain of 11 ± 3 percent. Mechanical properties of the dura mater did not vary significantly between side nor sex and decreased with the age of the cadaver. Both elastic modulus and tensile strength appear to have constant mechanical parameters within the first 139 hours post mortem. The mechanical properties provided by this study can help to improve computational and physical human head models. These properties under quasi-static conditions do not require adjustments for side nor sex, whereas adjustments of tensile properties accompanied with normal aging may be of interest.

Effects of extruder temperatures and raster orientations on mechanical properties of the FFF-processed polylactic-acid (PLA) material

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Budi Arifvianto ◽  
Yuris Bahadur Wirawan ◽  
Urip Agus Salim ◽  
Suyitno Suyitno ◽  
Muslim Mahardika
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Polylactic Acid ◽  
Tensile Tests ◽  
Degree Of Crystallinity ◽  
Content Type ◽  
Raster Angle ◽  
Loading Axis ◽  
Mohr’S Circle

Purpose The purpose of this study is to investigate the influences of extruder temperatures and raster orientations on the mechanical properties of polylactic-acid (PLA) material processed by using fused filament fabrication (FFF). Design/methodology/approach In this research, the PLA specimens were first printed with nozzle or extruder temperatures of 205°C, 215°C and 225°C and then evaluated in terms of their physical, chemical and mechanical properties. An appropriate extruder temperature was then selected based on this experiment and used for the printing of the other PLA specimens having various raster orientations. A series of tensile tests were carried out again to investigate the influence of raster orientations on the tensile strength, tensile strain and elastic modulus of those FFF-processed PLA materials. In the end, the one-way ANOVA was applied for the statistical analysis and the Mohr’s circle was established to aid in the analysis of the data obtained in this experiment. Findings The result of this study shows that the chemistry, porosity, degree of crystallinity and mechanical properties (tensile strength, strain and elastic modulus) of the PLA material printed with a raster angle of 0° were all insensitive to the increasing extruder temperature from 205°C to 225°C. Meanwhile, the mechanical properties of such printed PLA material were obviously influenced by its raster orientation. In this case, a PLA material with a raster orientation parallel to its loading axis, i.e. those with a raster angle of θ = 0°, was found as the strongest material. Meanwhile, the raster configuration-oriented perpendicular to its loading axis or θ = 90° yielded the weakest PLA material. The results of the tensile tests for the PLA material printed with bidirectional raster orientations, i.e. θ = 0°/90° and 45°/−45° demonstrated their strengths with values falling between those of the materials having unidirectional raster θ = 0° and 90°. Furthermore, the result of the analysis by using a well-known Mohr’s circle confirmed the experimental tensile strengths and the failure mechanisms of the PLA material that had been printed with various raster orientations. Originality/value This study presented consistent results on the chemistry, physical, degree of crystallinity and mechanical properties of the FFF-processed PLA in responding to the increasing extruder temperature from 205°C to 225°C applied during the printing process. Unlike the results of the previous studies, all these properties were also found to be insensitive to the increase of extruder temperature. Also, the result of this research demonstrates the usability of Mohr’s circle in the analysis of stresses working on an FFF-processed PLA material in responding to the changes in raster orientation printed in this material.

scholarly journals An Evaluation of Mechanical Properties (Tensile strength &Elastic Modulus) of Soldered Straight Stainless Steel Wire

2018 ◽  
Vol 40 (1) ◽  
pp. 15-18
Author(s):  
Wael A Alrazzaq
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Elastic Modulus ◽  
Steel Wire ◽  
Testing Machine ◽  
Control Group ◽  
Orthodontic Appliances ◽  
Efficient Treatment ◽  
Steel Wires

The joining of a metal framework is frequently necessary to create individual orthodontic appliances and to achieve efficient treatment procedures. Stainless steel wires can be fused together by welding but this generally required reinforcement with solder. The present study was conducted to compare and evaluate the mechanical properties ( i.e. the tensile strength and elastic modulus )of silver soldered joints of stainless steel. A total of 40 wire specimens were prepared. The tensile strength and elastic modulus tests were carried out via by universal testing machine. the results indicated that the mean tensile strength of soldered group is lower than that of soldered group. As well, there are highly significant differences between two groups for tensile strength (p<0.01). Furthermore, the soldered group has the highest mean of elastic modulus than that of control group. As well, there are highly significant differences between two groups for elastic modulus (p<0.01). It is concluded that Stainless steel wires (Remanium)have superior mechanical properties with regard to tensile strength and elastic modulus.

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