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What is the purpose of the tensile test?
Tensile testing is a destructive test process that provides information about the tensile strength, yield strength, and ductility of the metallic material. It measures the force required to break a composite or plastic specimen and the extent to which the specimen stretches or elongates to that breaking point.
What is the purpose of conducting tensile test on welded joints?
Tensile testing is widely used to measure the strength and ductility of the weld metal alone. Tensile testing of welds in place, with weld metal, HAZ, and base metal, allows an overall strength to be determined but usually cannot provide the strengths of the individual parts of the weldment.
What can be obtained from a tensile test?
Properties that are directly measured via a tensile test are ultimate tensile strength, breaking strength, maximum elongation and reduction in area. From these measurements the following properties can also be determined: Young’s modulus, Poisson’s ratio, yield strength, and strain-hardening characteristics.
What is the theory of tensile test?
The basic idea of a tensile test is to place a sample of a material between two fixtures called “grips” which clamp the material. The material has known dimensions, like length and cross-sectional area. We then begin to apply weight to the material gripped at one end while the other end is fixed.
What care should be taken while performing a test on UTM?
The grips used in the testing machine must be properly serrated so that there is no chance of slippage of the specimen. If the specimen breaks due to any reason, other than the tensile stress, the test procedure should be discarded, and a new test must be performed on a fresh specimen.
What are the disadvantages of tensile testing?
For example, the tensile strength determines the maximum stress with which a material can be loaded. To determine it, the tensile test is the most common method. However, there are individual disadvantages: Components are destroyed….Statistiken (1)
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What is the limitation of tensile test?
preparation of the samples can be time consuming and expensive. due to the destruction of the specimen, the tensile test is only suitable as a component test to a limited extent. small geometries can only be tested to a limited extent. the test can only be automated in exceptional cases.
What is purpose of UTM machine?
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.
How can fatigue test be conducted using UTM?
To perform a fatigue test a sample is loaded into a fatigue tester or fatigue test machine and loaded using the pre-determined test stress, then unloaded to either zero load or an opposite load. This cycle of loading and unloading is then repeated until the end of the test is reached.
How accurate is a tensile test?
Most test standards require a measurement accuracy of 1% for the measured value. This means measuring the modulus values and tensile stress of many materials is possible with the same test arrangement and without the need to reconfigure the arrangement.
Why do tensile test results vary?
The short answer is that it depends on the tensile property and the characteristics of the material being tested. For a given cross-sectional area and for any gauge length, different specimen geometries have no effect on the ultimate tensile strength and the yield strength of standard materials.
How is tensile testing carried out?