KFACTOR

Sheet metal: the K-factor a K-factor table gives for a bend of inside radius R in a sheet T thick.

Syntax

KFACTOR(table,R,T)

Argument	Meaning
table	A material's table, by its name (`"Mild steel"`, or the drawing's KTABLE), or a list of points, each `[R/T,K]`.
R	The bend's inside radius.
T	The sheet's thickness.

Result

A number from 0 to 1: the table's K-factor at the ratio R / T, interpolated in a straight line between its rows (below the first or beyond the last, that row's). A name no table has is an error.

Examples

Expression	Gives
`KFACTOR("Mild steel",2,2)`	`0.41`
`KFACTOR("Aluminium",6,2)`	`0.44`
`KFACTOR({[0,0.3],[2,0.5]},1,1)`	`0.4`

A drawing's K-factor from its material's table, and a bend's allowance with it:

T=2
R=3
KTABLE="Stainless steel"
K=KFACTOR(KTABLE,R,T)
BA=BENDALLOWANCE(90,R,K,T)

More expressions