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OS-C501

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Offshore Standard DNV-<strong>OS</strong>-<strong>C501</strong>, November 2013<br />

Sec.13 Definitions, abbreviations & figures – Page 181<br />

Table 13-4 Definitions of superscripts<br />

Superscripts<br />

¯ : maximum direct or shear stress in the structure/component<br />

^ : direct or shear stress of material at failure<br />

* : elastic or shear modulus of damaged face or core<br />

nl : non-linear<br />

lin : linear<br />

0 : initial<br />

1 : final<br />

top : top face<br />

bottom : bottom face<br />

Table 13-5 Definitions of sub-subscripts<br />

lin<br />

: proportional limit<br />

Sub-subscripts<br />

3 Figures<br />

3.1 Ply and laminate co-ordinate systems<br />

z,w<br />

y,v<br />

3<br />

’<br />

2’<br />

1’<br />

3<br />

2<br />

1<br />

O<br />

x,u<br />

Figure 13-1<br />

Local co-ordinate system and symmetry planes in an orthotropic bi-directional ply<br />

3.2 Sandwich co-ordinate system and symbols<br />

top<br />

E face<br />

top<br />

t fac<br />

z,w<br />

x,u<br />

d<br />

botto<br />

E face<br />

Figure 13-2<br />

Co-ordinate system, material and geometrical variables for sandwich structures<br />

E core ,<br />

G<br />

N<br />

A<br />

t core<br />

botto<br />

t fac<br />

q(x,y)<br />

Mx<br />

Mx<br />

Nx<br />

Tx<br />

Tx<br />

Nx<br />

z,w<br />

y,v<br />

x,u<br />

Figure 13-3<br />

Co-ordinate system, sign conventions, loads and moments for sandwich structures<br />

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