ABSTRACT
At the end of this chapter you should be able to:
• understand the difference between an isotropic material and an orthotropic material • appreciate what a plane stress is for a composite material • appreciate what a plane strain is for a composite material • appreciate what an anisotropic material is • appreciate what a ply or sheet or layer is • understand and develop a stiffness matrix for a composite • understand and develop a compliance matrix for a composite • appreciate what a Reuter’s matrix is • understand the relationships between stress and strain for composites • appreciate some failure criteria for composites
Now, stress, Eσ ε= ×
where ε = Δ L L1
and ε = Δ L L2
; L1 and L2 refer to the
lengths in directions 1 and 2, and Δ L1 and Δ L2 refer to the displacements in directions L1 and L2 respectively.
