I am an undergrad engineering student and I am deciding to conduct a non-destructive tensile test on a. I was told for one potential scenario that instead of clamping the outer surface to MTS, it is better to make a hole at both ends of the composite tube and pass a bolt through, which is subsequently attached to MTS machine. You may consider: Machine holes for your mounting pins into the tubing, then use grommets to protect the cut edge of the holes, as well as allowing the diameter of the pin, and corresponding hole, to be as large as possible in your sample to further mitigate the concentration of stresses. Another alternative is dark-field X-ray imaging to non-destructively detect micro-cracks and porosity in PMCs (also in relatively large parts), see e.g. Can anyone recommend a method that I can use to test the ripeness of Strawberry and Raspberry without damaging the fruit? Join ResearchGate to find the people and research you need to help your work. Currently, XRF (karatmeter) used are only surface level measurements. See :The first book, page 35, Fig 4a and the secind book page 99. It talks about the complex modulus of bitumen. Theory and application of non destructive testing method eddy current, Include a high pass filter in the eddy current test equipment, Include a low pass filter in the eddy current test equipment, There is no practical method for decreasing this effect, Coplanar with the major plane of the discontinuity, Perpendicular to the major plane of the discontinuity, Parallel to the major plane of the discontinuity, 90 degress out of the phase with current in the coil, Harmonic frequencies and inductive reactance, Electrical conductivity, frequency, and material geometry, Electrical conductivity, permeability, and material geometry, Thermal conductivity, electrical conductivity, and permeability, The argument of the mathematical function describing the electromagnetic field within the test specimen, Test frequency divided by limit frequency, The phase of the OD discontinuity leads the phase of the ID discontinuity, The phase of the OD discontinuity lags the phase of the ID discontinuity, Removing question excerpt is a premium feature. Q.1 Generation of eddy currents depends on the principle of: A. wave guide theory. I have been looking for a long time to no avail and I'm unsure where I can find such data. Each concrete hammer test has several calibrated curves (also called conversion curves) provided by the manufacturer. The ultrasonic testing, magnetic particle inspection, eddy current testing, X ray radiodraphy, ringing test are a few test for detection of voids. Methodological triangulation: involves using more than one method to gather data, such as interviews, observations, questionnaires, and documents. b) This will be dependent on the material of your substrate. 3. While Using the NDI methodology for establishing SHM-the probability of detection is suitable or not?if possible can v establish in our lab research ? b) Any change in the surface of the substrate? -The length of the beam is 2 meters which is monitored by 5 sensors attached on top surface of the I-shape beam. What is the difference between ultrasound or ultrasonic wave propagation in elastic and viscoelastic materials (concrete VS bituminous mixtures) ? I have written beblow some suggestions of things you might try, but I would advise on Eddy currents (scenario 2) at first. It is difficult to achieve the surface hardness of the ball by DT tests.