HANSER Hanser Publishers, Munich • Hanser Gardner Publications ...

where
P = load (N)
Lybyd = dimensions in (mm) as shown in Figure 4.5
The creep modulus Ec is calculated from
where /is deflection in mm. The maximum stress from Figure 4.6 after a period of 5 years
(= 43800 h) is
CJmax 23.44 N/mm 2
Initial applied stress
Figure 4.6 Creep curve for SAN [9]
Creep modulus
mm 2
JL
mm 2
Figure 4.7 Creep modulus for SAN [9]
Time at rupture
Time t
h
h
(4.17)