Scribd
Upload
51 views3 pages

Report 1

The document presents the results of a stress-strain test on a material sample. It includes a stress-strain curve showing the relationship between stress and strain. It also provides the yield strength, elastic modulus, ultimate tensile strength, and fracture strength as calculated from the test data. The elastic modulus is calculated to be 200935.6429 MPa based on the slope of the stress-strain curve in the elastic region.

Uploaded by

Llewellyn Aspa
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
51 views3 pages

Report 1

The document presents the results of a stress-strain test on a material sample. It includes a stress-strain curve showing the relationship between stress and strain. It also provides the yield strength, elastic modulus, ultimate tensile strength, and fracture strength as calculated from the test data. The elastic modulus is calculated to be 200935.6429 MPa based on the slope of the stress-strain curve in the elastic region.

Uploaded by

Llewellyn Aspa
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 3

Derived Data and Discussion

Stress-Strain Curve

Stress-Strain Curve
450
400
350
300
Stress (MPa)

250
200
150
100
50
0
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
Strain

Sample Calculations for Strain and Stress


F = 25.75KN = 25750MN; l = 62.6872mm
Stress Strain
25750 kN
σ= 62.6872mm−50.8 mm
π ε=
(9.11 mm)2 50.6 mm
4
σ =395.0487 MPa ε =0. 234

Yield Strength (using 2% offset method)


293.4866 MPa
Solution:
Proportional Limit = 293.4866 MPa
293.4866 MPa
Elastic Modulus = =200935.6429 MPa
0.0014606
Offset Strain: Offset Stress:
ε 0.2=ε × 0.00 2 σ 0.2=E × ε
0.002 0
0.0025 100.467821
0.0030197 204.894075
0.0034606 293.4866

Ultimate Tensile Strength


395.0487 MPa

Fracture Strength
266.7921 MPa
Elastic Modulus
Formula:
σ
E=
ε
 = 293.4866 MPa;  = 0.0014606
293.4866 MPa
E=
0. 0014606
E=200935.6429 MPa

Total Elongation experienced by the material before it fractures


Fl
∆ l=
AE
50.8 mm
∆ l=(395.0487 MPa)
200935.6429 MPa
∆ l=0.09988 mm

Length of the material right before fracture


l=∆ l+l 0
l=0.09988+ 50.8mm
l=50.8999 mm

You might also like