Composites

MATE50004

Hooke’s Law

Voigt Notation

What is the 1st assumption for materials?

The first assumption is that materials are homogeneous and isotropic

Define composite material

engineered materials madefrom two or more constituentmaterials with significantlydifferent physical or chemicalproperties which remainseparate and distinct on amacroscopic level within thefinished structure

How do you call indivdual amterials in a composite

constituents

How do laminates look like?

What is the relationship between Shear Modulus and Compliance?

Relationship between engineering shear strain, applied shear stress and Compliance

What is the equation for the technical strain?

How to find axial Yong’s Modulus of a composite?

Equation for Transverse Young modulus of composite

How to find Shear Modulus of a composite?

What is the equation for Poisson contraction for axial loading

Poisson contractions transverse loading equation for v12 and v21

Poisson contractions transverse loading equation for v23

What are the 2 scenarios for loading and when to use what?

1)Stresses are Additive → Direct Rule of Mixtures
- This occurs when you load a composite longitudinally (parallel to the fibers)

E_1 = fE_f + (1 - f)E_m

2) Strains are Additive → Inverse Rule of Mixtures
This occurs when you load a composite transversely (perpendicular to the fibers).

• \frac{1}{E_2} = \frac{f}{E_f} + \frac{1-f}{E_m}