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 BendingTorsionRound x-section  x = FL bend c/I  xz = FL arm c/J c = D/2  x =  x /E  xz =  xz /GI =  D 4 /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 * L bend  x = FL bend c/I c = D/2 I =  D 4 /64

Bending Only (Spreadsheet)

Elastic Modulus

Poisson’s Ratio

Properties (Bending Only)

Combined Loading (Stress Analysis)  x = F * L bend * c/I  z = 0  xz = F * L arm * 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