Lecture04-Notes - ME 382 Lecture 04 1 M ULTIAXIAL STRAIN...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ME 382 Lecture 04 1 M ULTIAXIAL STRAIN & STIFFNESS Isotropic linear elasticity Normal stresses and strains are related by: i) Youngs modulus: E ii) Poissons ratio: 1 0.5 For most materials 0.2 0.5 Shear stresses and strains related by: xx = xx / E zz = zz / E yy = zz = xx = xx / E xx = yy = zz = zz / E (no cross terms for shear) yy = yy / E xy = xy / G xx = zz = yy = yy / E xz = xz / G yz = yz / G ME 382 Lecture 04 2 In general : 3-D Hookes Law xx = xx yy zz ( ) / E yy = xx + yy zz ( ) / E zz = xx yy + zz ( ) / E xy = xy / G xz = xz / G yz = yz / G Special cases: (i) Plane stress: One stress = 0; e.g. , zz = 0 (such as at free surface) (ii) Plane strain: One strain = 0; e.g. , zz = 0 (constraint in rigid die) Volumetric strain: Original volume:...
View Full Document

Page1 / 5

Lecture04-Notes - ME 382 Lecture 04 1 M ULTIAXIAL STRAIN...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online