The basic concept is to grip the material between two holders e. Impact testing of materials charpy impact test lab2 4. Journal of civil engineering research and practice, vol. The force to achieve this is recorded and knowing the crosssectional area of the test piece the tensile strength is calculated. A typical instron load frame used for tensile testing. In order to discover the various properties of a material we must carry out material tests.
The hounsfield can often produce results which are largely different from what may have been expected from published data. For each species, single root specimens were sampled and tested for tensile tests in the laboratory using the hounsfield tensometer apparatus. A smallscale machine that fits on a benchtop and allows simple tensile tests of metal specimens up to a maximum load of 20 kn. These accessories can be made compatible by testresources to match test machines supplied by other manufacturers. What are the advantages and disadvantages of a tensile test. It involves using a small sample with a fixed crosssectional area and then pulling it with a tensometer at a constant strain rate until the sample breaks. Viewing by appointment only at ncm auctions, sandall house, unit 1 sandall drive, kick sandall industrial estate, doncaster. The use of an l vdt for load measurement permits the elimination of the mercury indication system of the tensometer.
We then begin to apply weight to the material gripped at one end while the other end is fixed. An earlier name for a tensile testing machine is a tensometer. The placing of the material in tension identifies the youngs modulus of the material. The universal testing machine can be used to determine the tensile strengths of. Abstract this experiment was conducted so as compare the mechanical properties of aluminium and mild steel. The tensometer monsanto, swindon, england tensile testing complex systems are available for determining absolute linear machine is used to obtain. A first experiment with the hounsfield tensometer emerald insight.
The hounsfield tensometer is a very popular machine amongst technical college staff and students alike. Hounsfield tensile testing machine suppliers, manufacturer. If you are looking for a hounsfield universal test machine then you should consider a universal test machine from testresources. Nov 12, 2006 the tensometer does this electronically. Tensometer definition of tensometer by medical dictionary. Tensile specimens and test machines stressstrain curves, including discussionsof elastic versus plastic deformation, yield points, and ductility true stress and strain test methodology and data analysis it should be noted that subsequent chapters contain more detailed information on these topics. It is useful for stress strain measurements and tensile tests. The strain rate for the test is programmed into the machine, after which the test may begin. Lab report 8 lab report lab session 8 to study tensile strength of. Typical tensile testing machines are shown in figures lea. Tinius olsen offers solutions for testing the strength and performance of plastics, metals, composites and many other materials through tensile, flexural, compression, folding endurance, impact, heat distortion, vicat, melt flow, tear and puncture tests. A tensile test applies tensile pulling force to a material and measures the specimens response to the stress. Single column tensile tester german manufactured aml. Uqx bioimg101x biomedical imaging recommended for you.
In 1980 hounsfield test equipment limited was registered as a testing machine company. Doitpoms tlp library crystallinity in polymers tensile. The fracture load for each sample was noted as well as the diameter at the point of fracture and the final gauge length. Mar 24, 2014 hte hounsfield tensile testing machine bongard2012. This is the highest stress a material can take before it breaks. There have been several models of the tensometer with each one designed for a different purpose. In this lab we are measuring the uts ultimate tensile strength. A tensile test, also known as a tension test, is one of the most fundamental and common types of mechanical testing. The tensometer converts this selected frequency to a value that is displayed for you to see. Jul 05, 20 instrumentation instron tests more expensive than the hounsfield greater accuracy not used in lab because of expense.
Materials testing lab is actively contributing in teaching and research activities in the. Way more information than you ever wanted on how to fell a tree. The highest point in the stressstrain curve refer to the graph given above is the ultimate tensile strength. The testing procedure was repeated for the rest of the specimens. Nov 18, 2015 hounsfield tensile material testing machine. Pdf determination of mechanical properties from stressstrain. Lab report 8 lab report lab session 8 to study tensile. Tensile test results showed that alkalitreated fiber composites increased in fracture strain twice to three times more than untreated fiber composites, without a considerable decrease in strength. They have similar uses but very different properties.
This was followed by a series of innovative designs, which drove the company forward. Principles of hardness testing comparison of different hardness techniques lab2 3. The hounsfield tester the hounsfield tester can do a variety of tests on a small test piece. Tensile tests are used to determine how materials will behave under tension load. Hounsfield tensile test, hounsfield tensile test suppliers. The photograph below is of the hounsfield h20kw apparatus, which was used to perform the experiment. An extensometer is a device that is used to measure changes in the length of an object. A universal testing machine utm, also known as a universal tester, materials testing machine or materials test frame, is used to test the tensile strength and compressive strength of materials. Not to be confused with tensiometer, tensometer, or tension meter. The extension of the material is read out on a dial or chart, so plots extension versus force stress versus strain.
Recorder chart drive through a pulse generator allows direct load displacement recording. Theory behind tensile testing tensile test lab tomos st john 7. The use of this approach for tensile test data analysis, as an instruction. A simple tensile test determines only one set of properties of a material, at a specific temperature, and a specific strain rate. Monsanto tensometer tensile tester testresources, inc. Impact resistance test was performed in accordance to astm d4812. As ever, innovation was key to hounsfields success at that time sir godfrey hounsfield, a family member, while working at emi, designed the brain scanner for which he.
Monsanto tensometer tensile tester test machines, grips. By doing this, tensile tests determine how strong a material is and how much it can elongate. Finding uts using the hounsfield tensometer in this lab we are measuring the uts ultimate tensile strength. The basics on the operation of universal testing machine were also learnt during this experiment. Hounsfield and testresources are comparable when it comes to performing uniaxial tensile, compression, cyclic, shear, flexure, bend, peel, tear and material characteristics tests such as elongation and modulus. There are many different types of tests available but the most common is the tensile. The hounsfield tester can do a variety of tests on a small test piece.
Too good to scrap so offers to cover postage and hopefully a bit more would be good. A first experiment with the hounsfield tensometer emerald. Alibaba offers 1,2 hounsfield tensile testing machine suppliers, and hounsfield tensile testing machine manufacturers, distributors, factories, companies. Testing machine, creep testing machine, hounsfield tensometer.
A reduced gage section specimen made from 6061t6 aluminum, ready for tensile testing. The basic idea of a tensile test is to place a sample of a material between two fixtures called grips which clamp the material. Aug 02, 2014 a tensometer is often part of a universal testing machine. A standard dimension bar of the material under test is clamped at each end. Click on image to view larger version first the sample is secured in place. The material has known dimensions, like length and crosssectional area. A range of frequencies is compared, and the one that most closely matches the response of your strings is selected. Monsanto tensometer tensile tester are available as part of a testresources product line of test machine accessories that include a wide range of test fixtures, high low temperature chambers, furnaces, tensile grips, and extensometers. What are the merits of the hounsfield tensometer answers. To perform tensile test on universal testing machine utm having capacity 300kn. Tensometer article about tensometer by the free dictionary. Tensometer tensile testing education kit by monsan. It was invented by charles huston who described it in an article in the journal of the.
Mm1 ultimate tensile strength deformation engineering scribd. Nsukka unn, using a hounsfield monsanto universal tensometer. Physicomechanical responses of polypropylenecaco3 composite. This tried and tested piece of equipment used by universities across the world allows users to perform tensile tests up to 20kn on specimens made of different metals to understand material characteristics such as upper and lower yield strengths. The tensile tests were performed on various tensile samples using monsanto tensometer. A wide variety of hounsfield tensile test options are available to you, such as tensile testing machine, universal testing machine.
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