Displays the end tangent length described as Lt. The Lt variable is required only for the UShaped bellows analysis.
Dimension 
Description 
Sketch 
Af 
Cross sectional metal area of one reinforcing fastener. 

Db 
Inside diameter of bellows convolution. 

Dm 
Mean diameter of bellows convolution. 

Dr 
Cross sectional diameter of the reinforcing ring. 

Lc 
Bellows collar length. For the toroidal bellows, Lc is determined by dividing the collar cross section area with the collar thickness. 

Lf 
Effective length of one reinforcing fastener. 

Lt 
End tangent length. 

Lw 
Distance between toroidal bellows attachment welds. 

q 
Convolution pitch. 

r 
Mean radius of toroidal bellows convolution. 

t 
Bellow nominal thickness of one ply. 

tc 
Collar thickness. 

w 
Convolution height. 