Cableizer ®

Linear thermal expansion coefficient armour bedding material

When an object is heated or cooled, its length change by an amount proportional to the original length and the change in temperature.

The values were taken or derived from, whereby the values typically are given in unit m$^{-6}$/(m.K):

Note: Greek letter $\chi$ is used because $\alpha$ was in use.

Symbol
$\chi_{ab}$
Unit
1/K
Formulas
$\frac{\chi_{ab,1} t_{ab,1}+\chi_{ab,2} t_{ab,2}}{t_{ab}}$
Related
$M_{ab}$
Armour bedding material
$t_{ab}$
Thickness armour bedding [mm]
$t_{ab,1}$
Thickness armour bedding 1 [mm]
$t_{ab,2}$
Thickness armour bedding 2 [mm]
Choices
MaterialValueReference
PE0.0002engineeringtoolbox
PVC0.00011engineeringtoolbox, netsch: 0.6-0.8
EPR0.000135engineeringtoolbox, Fluoroethylene propylene (FEP)
POC0.0002assuming same as PE
IIR0.000139engineeringtoolbox, Polybutylene (PB)
NR0.00022netsch, 1.8-2.6
PP9e-05engineeringtoolbox
SiR5e-06engineeringtoolbox
CR0.000139assuming same as IIR
CSM0.0002assuming same as PE
CJ0.0003between PP and bitumen
RSP0.000139assuming same as IIR
BIT0.0005like bitumen
fPOC0.0003150% of POC
fPP0.00012150% of PP
fPE0.0003150% of PE
fPVC0.00017150% of PVC
tape1e-05low value expected
Ot0.0002fallback if undefined