Question 40 (Textile Engineering & Fibre Science)
The surface helix angle of a fibre in a yarn of 0.3 mm diameter is 30o. Assuming ideal helix geometry, the helix angle (in degrees), of a fibre situated at 0.1 mm from the yarn axis, accurate to one decimal place, will be …………………
Given in the question–
Fibre dia(D)=0.3 mm
Helix angle of a fibre in a yarn()=30o
Fibre situation(d)=0.1 mm
Helix angle() =?
By helix geometry
is helix angle and D is diameter
By deviding both equetions.