Compression Lab Report ( Mechanics of Materials)

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Question Description

I will include the data and the Handout for this lab. I just need a lap report that follows the rubric.

Also, I will include a lab report from previous student, please take it as an example but do not copy from it, so I will not have plagiarism issues.

If you have any questions, reply to me

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Load (lbf) 5000 10000 15000 20000 25000 30000 35000 40000 45000 50000 55000 60000 65000 70000 75000 Recorded Calculated Cylinder 1 Compressive Readings (in) 0.0004 0.0007 0.0012 0.0021 0.0029 0.0035 0.0042 0.0046 0.0052 0.0057 0.0062 0.0069 0.0089 0.0090 0.0097 Cylinder 2 Compressive Readings (in) 0.0001 0.0007 0.0015 0.0021 0.0028 0.0033 0.0040 0.0047 0.0054 0.0062 0.0069 0.0088 GL= 8 in GF = 2 Diameter = 4 in Cylinder 1 was cured for 28 Days then tested Cylinder 2 was cured for 14 Days then tested Assume both cylinders are same material r 28 Days then tested r 14 Days then tested re same material Scanned with CamScanner Scanned with CamScanner Scanned with CamScanner Scanned with CamScanner Scanned with CamScanner Southern Illinois University Department of Mechanical Engineering Mechanics of Materials Lab ME 350B Lab #2 Compression Test Name: Abdulrahman Abouhameda Date Submitted: 3/1/2018 Table of Contents Objective ......................................................................................................... 3 Scope……………………………………………………………………………………………………... 3 Introduction .................................................................................................. 3-4 Equipment ....................................................................................................... 4 Procedure………………………………………………………………….4-5 Results .......................................................................................................... 6-7 Graphs……………………………………………………………………… 8 Equations…………………………………………………………………… 9 Calculations………………………………………………………………… 9 Discussion ..................................................................................................... 10 Conclusion ............................................................................................... 10-11 Objective: The objective of this experiment is to use compression test to examine the behavior of a concrete sample when subjected to different levels of compression. Scope: The compression test is used to determine if the material’s tested is safe for daily use in projects such as roads, bridges, buildings, and other projects or fields of Civil Engineering or Mechanical Engineering. Introduction: In the present world concrete is among the most used materials for construction purposes. This owes to the fact that it is readily available, cheap to buy, easy to use, and highly compressible. In this experiment we observe the behavior of the concrete sample when it is subjected to different levels of compression. As we start the experiment the following measurements of the concrete were obtained using caliper: height of 8, length of 4, gauge length of 5.5, and a gauge component of 2. The compression machine was used to apply the compression pressure on the concrete starting from 0 lbs to approximately 50,000 lbs. as more compression pressure was applied by the machine the meter readings are recorded at each level of compression. The readings obtained are then used to plot a stress-strain graphs which outlines the yield point, proportional limit, fracture, modulus of resilience, modulus of elasticity, and extreme stress of the concrete samples. At a given point the concrete was able to revert to its initial state but when more loads was applied it was not possible to regain its initial properties rather it permanently breaks down. Given its ability to withstand great pressure and its high modulus of elasticity it can be conclude that concrete is the most reliable material for construction purposes. Equipment: • Compression Testing Machine. • Compress meter. • Caliper. • Ruler. • Concrete specimen. • Marker Procedure: • Find length and diameter by the ruler • Put the concrete specimen in the compression testing machine • Put the plastic shield • Set the machine to zero • Start the compression testing machine • Record the compressive reading at each 5000lb until the failure The specimen after it fractures and fail in the compression test Results: The results obtained are used to plot a stress-strain diagram and we determine the Strain, 𝑐𝑜𝑚𝑝𝑟𝑒𝑠𝑠𝑖𝑣𝑒 𝑅𝑒𝑎𝑑𝑖𝑛𝑔 using the equation: 𝜀= Load (lbf) (𝐺.𝐿∗𝐺.𝐹) 𝐿𝑜𝑎𝑑𝑎𝑝𝑝𝑙𝑖𝑒𝑑. and stress using the equation: 𝜎= Cylinder 1 Cylinder 2 Compressive Compressive Readings Readings (in) (in) 5000 0.0004 0.0001 10000 0.0007 0.0007 15000 0.0012 0.0015 20000 0.0021 0.0021 25000 0.0029 0.0028 30000 0.0035 0.0033 35000 0.0042 0.0040 40000 0.0046 0.0047 45000 0.0052 0.0054 50000 0.0057 0.0062 55000 0.0062 0.0069 60000 0.0069 0.0088 65000 0.0089 70000 0.0090 75000 0.0097 𝐴𝑟𝑒𝑎 Dry Specimen: Compressive Load (lbf.) 5000 10000 15000 20000 25000 30000 35000 40000 45000 50000 55000 60000 65000 70000 75000 Dry Compressive Readings (in) 0.0004 0.0007 0.0012 0.0021 0.0029 0.0035 0.0042 0.0046 0.0052 0.0057 0.0062 0.0069 0.0089 0.0090 0.0097 Area Dry (in^2) σ dry (psi) ε dry (in/in) E Dry 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 397.8873577 795.7747155 1193.662073 1591.549431 1989.436789 2387.324146 2785.211504 3183.098862 3580.986220 3978.873577 4376.760935 4774.648293 5172.535650 5570.423008 5968.310366 0.00002500 0.00004375 0.00007500 0.00013125 0.00018125 0.00021875 0.00026250 0.00028750 0.00032500 0.00035625 0.00038750 0.00043125 0.00055625 0.00056250 0.00060000 15915494.31 18189136.35 15915494.31 12126090.90 10976202.97 10913481.81 10610329.54 11071648.22 11018419.14 11168767.94 11294866.93 11071648.22 9298940.495 9902974.237 9947183.943 Area Wet (in^2) σ wet (psi) ε wet (in/in) E Wet 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 12.56637061 397.8873577 795.7747155 1193.662073 1591.549431 1989.436789 2387.324146 2785.211504 3183.098862 3580.986220 3978.873577 4376.760935 5172.535650 0.00000625 0.00004375 0.00009375 0.00013125 0.00017500 0.00020625 0.00025000 0.00029375 0.00033750 0.00038750 0.00043125 0.00051250 63661977.24 18189136.35 12732395.45 12126090.90 11368210.22 11574904.95 11140846.02 10836081.23 10610329.54 10268060.84 10149010.86 10092752.49 Wet Specimen: Compressive Load (lbf.) 5000 10000 15000 20000 25000 30000 35000 40000 45000 50000 55000 60000 Wet Compressive Readings (in) 0.0001 0.0007 0.0015 0.0021 0.0028 0.0033 0.0040 0.0047 0.0054 0.0062 0.0069 0.0088 Graphs: stress - strain dry 7000 stress (psi) 6000 5000 4000 3000 2000 1000 0 0 0.0001 0.0002 0.0003 0.0004 strain (in/in) 0.0005 0.0006 0.0007 stress - strain wet 6000 stress (psi) 5000 4000 3000 2000 1000 0 0 0.0001 0.0002 0.0003 strain (in/in) 0.0004 0.0005 0.0006 Equations: Area: 𝐴 = 𝜋𝐷𝑖2 (𝑖𝑛2 ) 4 𝐿𝑜𝑎𝑑 𝑃 Stress: 𝜎 = 𝐴𝑟𝑒𝑎 = 𝐴 (𝑝𝑠𝑖) Strain: 𝜀 = 𝐶𝑜𝑚𝑝𝑟𝑒𝑠𝑠𝑖𝑣𝑒 𝑅𝑒𝑎𝑑𝑖𝑛𝑔 (𝐺.𝐿∗𝐺.𝐹) 𝜎2 −𝜎1 Modulus of elasticity = Young’s modulus: 𝐸 = 𝜀2 −𝜀1 𝜎 𝜀 𝜎2 (in/in) 𝑀𝑝𝑠𝑖 𝑀𝑝𝑠𝑖 Modulus of resilience = 2𝐸 𝑀𝑝𝑠𝑖 Calculations: Dry specimen: Area 𝜎 𝜀 E Modulus of Elasticity Modulus of Resilience Proportional Limit Ultimate Strength 12.56637061 (𝑖𝑛2 ) 6366.197724 (𝑝𝑠𝑖) 0.000643750 (in/in) 9889239.182(𝑝𝑠𝑖) 9645754.127 (𝑝𝑠𝑖) 30153475.91 (𝑝𝑠𝑖) 5968.310366 (𝑝𝑠𝑖) 6366.197724 (𝑝𝑠𝑖) Wet specimen: Area 𝜎 𝜀 E Modulus of Elasticity Modulus of Resilience Proportional Limit Ultimate Strength 12.56637061 (𝑖𝑛2 ) 5172.535650 (𝑝𝑠𝑖) 0.000512500 (in/in) 10092752.49 (𝑝𝑠𝑖) 9431404.035 (𝑝𝑠𝑖) 23470315.02 (𝑝𝑠𝑖) 4774.648293 (𝑝𝑠𝑖) 5172.535650 (𝑝𝑠𝑖) Discussion: The stress-strain graph outline information about the reaction of concrete when subjected to different levels of compression. The first graph, it can be noted that the graph is straight at the start, and in this part the slope gives the modulus elasticity of the concrete. As more weight is added, the graph rises to a point where it attains the proportional limit. At this point the concrete can revert to its initial shape upon removal of the compression pressure. However, if the pressure continues beyond this point, the line halts being straight up and the yield point is attained. Past the yield point the concrete will break and thereby deforming because it can no longer stand more weight. This means that the limit has been breached at the cracking point. The graph rises to a point it meets the base at the proportional limit. At the proportional limit, the concrete can revert to its original shape if the compression pressure is removed, but if the pressure continues the line stops being straight up to the yield point. Past the yield point the concrete will break and deform because it cannot stand any more pressure, that is, the limit has been breached at the crack point. However, in this experiment our source of error that we did not have perfect fracture so we had to make the test again until it fractures. Conclusion: The compression test experiment was used to examine the behavior of a concrete sample when subjected to different compression pressures. The results obtained were then used to plot the stress strain diagram in which it was possible to determine the ultimate compression strength, modulus of resilience, and modulus of elasticity. The concrete proved to withstand the high compression pressure thereby making it the best material to use for construction purposes. ...
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Mwangi92
School: University of Maryland

Attached.

Running head: COMPRESSION TEST

1

Southern Illinois University
Department of Mechanical Engineering
Mechanics of Materials Lab (ME 350B)
Lab #2: Compression Test
Name of the Student:
Date of Submission:

Running head: COMPRESSION TEST

2

Table of Contents
Content

page number

Objective

3

Scope

3

Introduction

3

Equipment

4

Procedure

5

Results

6

Graphs

11

Equations

11

Calculations

11

Discussion

13

Conclusion

13

References

14

Running head: COMPRESSION TEST

3

Objective:
The objective of this experiment is to use compression test to examine the
behavior of a concrete sample when subjected to different levels of compression.
Scope:
The compression test is used to determine if the material’s tested is safe for day to
day use in projects such as roads, bridges, buildings, and other projects or fields of Civil
Engineering or Mechanical Engineering.
Introduction:
A compression test is any test in which a material experiences opposing forces that push
inward upon the specimen from opposite sides or is otherwise compressed, “squashed”,
crushed, or flattened. The test sample is usually placed in between two plates that
distribute the applied load across the entire surface area of two opposite faces of the test
sample. The plates are then pushed together by a universal test machine causing the
sample to flatten. A compressed sample is usually shortened in the direction of the
applied forces and expands in the direction perpendicular to the force.
The objective of a compression test is to determine the behavior or reaction of a material
while it e...

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