Youngs Modulus And Poissons RatioSolid Mechanics
Young’s Modulus and Poisson’s Ratio
Solid Mechanics Lab #2
Hyungjun Kang
00939822
9/9/2014
Purpose:
1. To investigate the effect and relationships of tensile and lateral strain on a specimen.
2. To gain knowledge in use of the instrumentation to conduct the above investigation.
Introduction:
The objective of this experiment is to demonstrate the relationships of a lateral and longitude strain on a common sample of aluminum within the elastic range .The sample is initially bolted in to the hand Crack Tensile Strain Machine. Then the strain gauges are attached and the preload is applied and the three necessary dimensions are obtained from Digital Caliper. Next, the crank is rotated and a load is applied in several increments and the deformations are noted. Finally, the dimensions are evaluated and experimental values for young’s Modulus and Poisson’s Ratio are generated.
Materials:
1. Hand Crank Tensile Strain Machine
2. Voltage source
3. Calipers or comparable
4. Lab notebooks, Writing Utensils
5. Switch and balance
6. Strain gauge.
Raw Data
Specimen Type
AL 6061 T-6
Initial Widith
1.9833in
Initial Thickness
.1256 in
Pre-load
0 lbs
Sr. No.
Load P
Strain Long
Strain Long
Strain Lat.
Strain Lat.
lbs
10^-6
10^-6
10^-6
10^-6
I
II
I
II
1
200
86
133
-29
-48
2
400
182
257
-55
-84
3
600
272
340
-84
-114
4
800
341
442
-119
-143
5
1000
432
538
-136
-167
Sr. No.
Load P
Strain Long.
Strain Lat.
Stress
lbs
10^-6
(10^-6
Avg
Avg
psi
1
200
109.5
-38.5
794.723
2
400
219.5
-69.5
1589.446
3
600
306
-99
2384.169
4
800
391.5
-131
3178.892
5
1000
485
-151.5
3973.615
Results
1. Young’s Modulus(Experimental) : 8465.746 Ksi
2. Young’s Modulus(Published):10,000 Ksi
3. Percent Difference: 15.342%
4. Poisson’s Ratio(Experimental): 0.3009
5. Poisson’s Ratio(Published): 0.33
6. Poisson’s Ratio(experimental): 8.81%
Discussion: The experiment was successful. The values for Young’s Modulus and Poisson’s Ration
Solid Mechanics Lab #2
Hyungjun Kang
00939822
9/9/2014
Purpose:
1. To investigate the effect and relationships of tensile and lateral strain on a specimen.
2. To gain knowledge in use of the instrumentation to conduct the above investigation.
Introduction:
The objective of this experiment is to demonstrate the relationships of a lateral and longitude strain on a common sample of aluminum within the elastic range .The sample is initially bolted in to the hand Crack Tensile Strain Machine. Then the strain gauges are attached and the preload is applied and the three necessary dimensions are obtained from Digital Caliper. Next, the crank is rotated and a load is applied in several increments and the deformations are noted. Finally, the dimensions are evaluated and experimental values for young’s Modulus and Poisson’s Ratio are generated.
Materials:
1. Hand Crank Tensile Strain Machine
2. Voltage source
3. Calipers or comparable
4. Lab notebooks, Writing Utensils
5. Switch and balance
6. Strain gauge.
Raw Data
Specimen Type
AL 6061 T-6
Initial Widith
1.9833in
Initial Thickness
.1256 in
Pre-load
0 lbs
Sr. No.
Load P
Strain Long
Strain Long
Strain Lat.
Strain Lat.
lbs
10^-6
10^-6
10^-6
10^-6
I
II
I
II
1
200
86
133
-29
-48
2
400
182
257
-55
-84
3
600
272
340
-84
-114
4
800
341
442
-119
-143
5
1000
432
538
-136
-167
Sr. No.
Load P
Strain Long.
Strain Lat.
Stress
lbs
10^-6
(10^-6
Avg
Avg
psi
1
200
109.5
-38.5
794.723
2
400
219.5
-69.5
1589.446
3
600
306
-99
2384.169
4
800
391.5
-131
3178.892
5
1000
485
-151.5
3973.615
Results
1. Young’s Modulus(Experimental) : 8465.746 Ksi
2. Young’s Modulus(Published):10,000 Ksi
3. Percent Difference: 15.342%
4. Poisson’s Ratio(Experimental): 0.3009
5. Poisson’s Ratio(Published): 0.33
6. Poisson’s Ratio(experimental): 8.81%
Discussion: The experiment was successful. The values for Young’s Modulus and Poisson’s Ration
References: Mat web. “Aluminum 6061-T6; 6061-T651.” ASM Aerospace Specification Metals Inc. 11 February 2010<http://asm.matweb.com/search/SpecificMateral.asp?bassnum=MA6-61T6> Mechanics of Solids Course Pak. Fall2009. ME225 ME lab 2-Solid Mechanics internal Reverences inside Pak: mechanics of Materials (Wiley), Introduction to Mechanics of Materials (Prentice Hall), Strength of Materials (Nash)