Contents
What does a Hounsfield tensometer do?
Finding UTS using the Hounsfield Tensometer In this lab we are measuring the UTS – Ultimate Tensile Strength. This is the highest stress a material can take before it breaks. We will also analyse the test to determine the YS – Yield Strength.
What is the Hounsfield test?
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, tensile strength and overall extension.
What is Tensometry?
tensometer (plural tensometers) A device for evaluating various tensile properties of a material, such as Young’s modulus, ultimate tensile strength and Poisson’s ratio.
Is tensile testing destructive?
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 does an extensometer do?
An extensometer is an instrument that measures test specimen elongation to characterize strain. The range of applications where extensometers are used is diverse and the technical requirements for these devices are multifaceted.
What is a tensile testing machine?
A tensile test, also known as a tension test, is one of the most fundamental and common types of mechanical testing. A tensile testing machine consists of a test frame that is equipped with a load cell, testing software, and application-specific grips and accessories, such as extensometers.
How do you carry out a 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 is borehole extensometer?
An extensometer is a measuring device designed to measure changes in the length of a specific object. Borehole extensometers (e.g. SMART MPBX) are specifically designed to fit easily in a standard size borehole; for example, the type drilled out in order to install stabilizing cable bolts.
Does an extensometer measure true strain?
In other words the extensometer gives you the “real” data. IN addition, each extensometer has a length or gauge length should be known to calculate the strain based on that length. from extensometer we can get the strain value…..that is tensile strain, unifrom elongation, strain at break etc.
How do I read my tensile test results?
It indicates the strength of the material just as it starts to permanently change shape. It is determined as the value of the stress at which a line of the same slope as the initial portion (elastic region) of the curve that is offset by a strain of 0.2% or a value of 0.002 strain intersects the curve.
Who invented the tensile test?
Abstract: The engineering mechanics and concrete materials community lost one of its great contributors: Professor Fernando L. L. B. Carneiro,the inventor of the splitting tension test for measuring the tensile strength of concrete, also known as the Brazilian test.
What makes the results of a tensometer so accurate?
This little known plugin reveals the answer. Accurate results from tensometer devices depend upon the quality of the test piece. Any defect that is created during the cutting process can skew test results and lead to premature failure under strain.
How is the Hounsfield h20k-w apparatus used?
The photograph below is of the Hounsfield H20K-W apparatus, which was used to perform the experiment. First the sample is secured in place. The strain rate for the test is programmed into the machine, after which the test may begin.
How is a sample held in a tensometer?
The sample is dumbbell-shaped so that it can be firmly held by each set of grips. The test is carried out using a tensometer. The photograph below is of the Hounsfield H20K-W apparatus, which was used to perform the experiment. First the sample is secured in place.
How is the Young’s modulus determined in a tensometer?
Tensometers enable engineers to determine the Young’s modulus for the material being tested. Young’s modulus represents the initial linear slope of a material’s stress-strain curve, defined as the tensile strength divided by the tensile strain.