Combined Loading Test Perform Bending Only Test to

obtain Elastic Modulus and Poisson’s Ratio

Compare the materials properties Perform Combined Loading Test Do Stress Analysis, and compute

Principal Stresses and Orientation Do Strain Analysis, and compare

strains calculated from stresses

Combined Loading

Both Bending & Torsion

Stresses and Strains

Bending Torsion Round x-section

x = FLbendc/I xz = FLarmc/J c = D/2

x = x /E xz = xz /G I = D4/64

z = - x G = E/(2+2) J = 2 I

Conduct the Combined Loading Test

Please initialize the Strain Meter a couple of times to ensure that it indicates zero strains at zero load, and that there is NO DRIFT with time

Bending Only (Equations)

M = F * Lbend

x = FLbendc/I

c = D/2

I = D4/64

Bending Only (Spreadsheet)

Elastic Modulus

Poisson’s Ratio

Properties (Bending Only)

Combined Loading(Stress Analysis)

x = F * Lbend * c/I

z = 0

xz = F * Larm * c/J

Stress Analysis (Spreadsheet)

Strain Analysis (Equations)

x = x / E

z = - * x

xz = xz / G

Strain Analysis (Spreadsheet)

Longitudinal Strain (Plot)

Transverse Strain (Plot)

Shear Strain (Plot)

Lab #6 Spreadsheet (1 page)

Lab #6 Report due Next Week Cover Page + Abstract Data Sheet Spreadsheet including Material

Properties Plot #1: Elastic Modulus Plot #2: Poisson’s Ratio Plot #3: Axial Strains Plot #4: Transverse Strains Plot #5: Shear Strains Comments and Conclusions