1. Longitudinal Round Tensile Test (ASTM E8) The purpose of ASTM E8 was to determine important properties of the metal specimens. The diameter and initial gage length were measure before the specimens were tested. The samples that underwent tensile loads were Cold Rolled Steel, 2024-T351 Aluminum, and Grey Cast Iron. The tensile test was carried out and when the specimen reached failure, its broken pieces were removed. Their failure diameter and final gage length were measured and recorded. From the date recorded from the tensile tests, the following properties were calculated: Stress at Johnson’s Apparent Elastic Limit, Yield stress at 0.20% and 0.05% offset, Ultimate/failure stress, Ultimate/failure strain, Modulus of Elasticity, Modulus …show more content…
The Charpy Impact Test required to the machine to overcome the friction while swinging. Therefore, the machine was calibrated by releasing the heaving hammer, and it swung freely to one full swing. This previous process allowed the machine to utilize energy to overcome friction. Once the machine was calibrated, the hammer was located and locked at a certain height. The hammer was leased and it impact the specimen supported at its two ends. The machine indicated the energy required to impact and brake the metal specimen. The Charpy test was run over 1045 Cold Rolled Steel, 2014-T351 Aluminum and Grey Cast Iron. The machine breaks were not working properly, therefore this could have a caused a systematic error while performing the test. The average energy used to overcome the friction in the machine was 37.33 ft-lbs. And, the specimen with the highest fracture energy was Aluminum, 40ft –lbs. On the other hand, the fracture energy for steel was 8.7ft-lbs. The lowest fracture energy from all the …show more content…
By doing the Rockwell “B” and “C”, the hardness of the metal samples were measured. The needles used for the Rockwell test were, steel ball for “B” and a diamond cone for “C”. The highest Rockwell “B” Hardness number, average, was 71.214 for a 1045 Cold Rolled Steel sample. Additionally its Ultimate tensile strength was 6.38E4 psi, the highest ultimate tensile strength from all the metal
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In the second model our dummy variable membership in the EU was substituted by the dummy variable membership in the economic and monetary union and therefore we want to investigate whether it is advantageous to be a member of the Economic and Monetary Union or not. Now we denote year by t and country by i and use the following estimation for our basic model: lnfdiit = β0 + β1(wages)it + β2(lnpop)it + β3(lnpatent)it + β4(gdp_growth)it + β5(lnelectric)it + β6(openness)it + β7(unemployment)it
So, in the end, one could conclude that using an aluminum bat is better than using a wood bat, simply because of all the recent advancements in science, metal, and engineering. To develop a science experiment of one’s own they would need a baseball field, baseball bats one wood, another aluminum (same length and weight) a bucket of baseballs, a stake to mark where the baseballs land, 7 tape measures (50ft), a pitching machine, a paper pad and pen, an outfielder, a pitcher, and lastly a hitter. The way one would conduct this experiment is by having the pitcher set the pitching machine to a reasonable speed, then have the pitching machine pitch, the hitter hit 15 balls with both bats. After every hit ball have the outfielder put stakes in the ground to mark where the balls landed, then record the distance after with the tape
Materials: Computer Procedure: You gather your computer and then you go to the website; http://phet.colorado.edu/simulations/sims.php?sim=Projectile_Motion You then click on the play button so you can get to the part where you set up your experiment to get your data. Then in the box that you can scroll that would be on your right hand side, you scroll down until you see a golf ball and pick that as your object.
Friction 1. Prevents your soccer ball from going forward forever when it is kicked. The soccer ball rubs against the ground, which causes resistance and slows the ball down this can cause the ball from not going into the goal. 2. Sliding friction pushes against an object when that object that is moving but not leaving the ground.
1. What best describes the type of testing as explained on pages 128-129. The type of testing used in this case, according to the Dial firm was the Criterion Validity. The firm created a test called Work Tolerance Screen (WTS) in 2000 and the purpose was to test potential new employees and current employees performing the job.
Using that information we had to determine the maximum force the beam could withstand. Since I’m still a bit unsure of what type of engineering I
INTRODUCTION Welding has always been something that interests me a lot. It’s always looked like fun and I wanted to try it out. After I tried it once at work I made up my mind that that was what I wanted to do after school. I plan on attending TSTC in Hutto for welding, machining, and fabrication working.
The experiment is designed to find out the linear velocity and rotational velocity of the ball and the height difference between before the golf club hits the ball and after hits the ball in order to calculate the energy loss. The numbers are labeled in Figure 2 and 3 in order to describe the major part of the setting of the experiment. The number 1 in Figure 3 is modified part of the golf club. The head of the golf club is modified to be able to change the loft angle.
Most of the human bones are strong and can stand pressure; however there is times when it can 't and that leads to a fracture(medicalnewstoday.com). A fracture is when you do something harsh to your body and you end up breaking a bone. “A percentage of bone fractures occurs because of high force impact or stress”(medicalnewstoday.com). There is a variety of categories for fractures but according to WebMD Medical Reference, the main are complete, incomplete, compound and simple. A complete one is when you break a part of you bone completely, an incomplete is when you just dont break it 110%, a compound is when you break that bone and the connection of the other bone, and lastly, simple, is when you just break that bone.
To assess the microstructure and the mechanical properties of as merged mass examples for various machining parameters and exploratory parameters in ECAP. 5. To improve conditions for better microstructure and mechanical properties. 6. To survey the microstructure and mechanical properties of as hardened Mass examples for different machining parameters and trial parameters in ECAP.
Introduction The purpose of this lab was to investigate how the orientation of a particular object affects the coefficient of friction and how to calculate the coefficient of friction and calculate it. The question we are trying to answer is: If I change the orientation of the object on different surfaces what will happen to its coefficient? Hypothesis When the orientation of the object is changed from standing up to laying down the coefficient of friction will changed. When the surfaces is changed the coefficient of friction will change.