Tensile Test Data

Initial diameter of the sample = 0.502 in

Initial cross sectional area = 0.1979 in 2

Gage Length = 8.00 in.

Material : Steel

LOAD

(LB)

ELONGATION

(IN)

AREA

(in2)

1100

0.0010

0.1979

1950

0.0020

0.1975

2570

0.0030

0.1973

3230

0.0040

0.1973

3800

0.0050

0.1973

4600

0.0060

0.1973

5300

0.0070

0.1973

6160

0.0080

0.1973

6600

0.0090

0.1973

7300

0.010

0.1973

7600

0.0110

0.1973

7500

0.0120

0.1973

7450

0.0135

0.1973

7560

0.0140

0.1973

7600

0.0150

0.1972

7780

0.0160

0.1971

7700

0.0505

0.1956

8100

0.1000

0.1936

8000

0.1500

0.1932

8700

0.2000

0.1932

9300

0.2500

0.1917

9860

0.3000

0.1909

10330

0.3600

0.1886

10980

0.4600

0.1863

11850

0.6000

0.1817

12340

0.8600

0.1765

12450

1.0600

0.1706

12620

1.2600

0.1640

12760

1.4600

0.1514

9840

1.6700

0.0881

 

QUESTIONS

  1. On your formal data sheet list load, elongation, engineering stress, strain and true stress at each interval. 
  2. For a copy of the Table in Microsoft Word format click here. (If your browser can not open this link, check your email for a copy of this file)

    For a copy of the Table in Microsoft Excel format click here. (If your browser can not open this link, check your email for a copy of this file)

  3. Plot a graph of stress as ordinate versus strain as abscissa.  (Include true stress and engineering stress)
  4. Determine the ultimate stress (Tensile Strength) from the engineering stress-strain curve.
  5. Replot the stress versus strain values for the first 13 data points. 
  6. Find the yield point . (How many psi ?) 
  7. What is the value of the proportional limit (psi) ? 
  8. Replot the stress versus strain values for the first 10 data points. If you are using Microsoft Excel, click on data points and select CHART, ADD TRENDLINE, LINEAR. Then click on OPTIONS, click DISPLAY EQUATION ON CHART and DISPLAY R-SQUARED VALUE ON CHART. This will give you a linear curve fit. The slope of the equation gives the Modulus of Elasticity. R2 value indicates how good the curve type agrees with the data. If R 2 equals 1 or close to 1 it means a good curve fit.
  9. Using the graph as described in Step 7, calculate the modulus of elasticity (psi). (You may also use MDSOLIDS software.)
  10. Calculate % elongation and % reduction in area. 
  11. Using the area under the curve, calculate the modulus of toughness.  
  12. How much is the breaking stress (rupture stress) ?

Links

Mechanical Properties of Materials: The Tensile Tests

Analyzing the Tensile Test Data

Laboratory Demonstration: Aluminum Alloy Tensile Specimens Polymer Tensile Specimens

 

 

Back to the Table of Contents

Prepared by: Serdar Z. Elgun

Last Update: March 1, 2000