In 2018 I finally had the opportunity to once again teach Physics and have been working hard to build the program. In 2011 I moved back to Brandon, Manitoba and started working at the school I had graduated from, Crocus Plains Regional Secondary School. While there I also started a tremendously successful new course that gave students the ability to explore their interests in science and consisted of students completing one project a month, two of which were to be hands-on experiments, two of which were to be research based, and the final being up to the student. While teaching Physics there, I decided to invest in PASCO products and approached the Killarney Foundation with a proposal about funding the Physics lab with the SPARK Science Learning System and sensors. Having graduated with a major in Computer Science and minors in Physics and Mathematics, I began my teaching career at Killarney Collegiate Institute in Killarney, Manitoba in 2009. Data is recorded liveĪnd can be played back in PASCO Capstone software. The hand-cranked Materials Testing Machine allows students to feel the different forces required to break different samples. Strain graph to determine the Modulus of Toughness for the material. Find the maximum strain just before it breaks to determine the Ductility of the material.Find the maximum stress on the graph to determine the Tensile Strength.Position graph to see where the linear part of the curve ends. Estimate the Yield Strength by examining the Force vs.Strain graph to find Young’s Modulus for the material. Measure the slope in the linear portion of the Stress vs.These properties are the same ones found in materials handbooks and databases and are used by engineers to design bridges, buildings, and machines. The properties measured for these samples include Young’s Modulus, Yield Strength, Tensile Strength, Ductility, and Modulus of Toughness. Sample 4: Stress vs.The three metal tensile samples are made from 1018 Steel, 360 Brass and 2024-T3 Aluminum. * When you observe on the Stress versus Strain plot that the material has been stretched beyond the elastic region, you can begin to turn the crank faster. The slope of the line is Young's modulus in units of MPa (or MN/m
Do not include this region in your selection.) Click the Fit button to apply a linear curve fit to the selected data. This nonlinearity is likely due to the straightening of bends and twists in the coupon as force is first applied.
(You may find that the very first part of the plot is not linear. To calculate Young's modulus, drag the mouse to select a data region covering the linear, lower left-hand part of the graph. On the Stress versus Strain graph, you can identify features such as the elastic region, the plastic region, the yield point, and the break point. Use the same method you used to rename the calibration data. Rename the data run to identify the coupon. If the coupon breaks near the end, it was probably twisted slightly when you mounted it, resulting in a point of higher stress where it broke. (If you reach the maximum force, DataStudio will stop automatically.) If the coupon breaks, it should break in the middle.
When you have finished collecting data, click Stop. Starting just before the lever arm comes into contact with the Force sensor, turn the crank very slowly.*
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