6.4 Forces and Stresses Flashcards
1
Q
Define tension
A
ability to resist breaking when stretched
(pulling force)
2
Q
Define compression
A
ability to resist crushing
(pushing force)
3
Q
Define shear
A
when fabrics are pulled away against each other
(forces act across a material)
4
Q
Define flexibility
A
ability to recover after bending or twisting
5
Q
State 4 forces/stresses
A
- flexibility
- tension
- shear
- compression
6
Q
What can loaded rucksacks/tents be reinforced with?
A
aluminium or carbon fibre frames
7
Q
Describe quilting
A
several layers of fabric stitched together, including an inner padded layer (protection)
8
Q
What does layering textiles do? (3)
A
- add structural support
- insulation
- makes products more comfortable to wear
9
Q
What does piping do? (3)
A
- structure to shape
- durability
- can be decorative
10
Q
What is stay stitching?
A
large, straight stitch sewn in an area that can distort during construction (e.g on a curved neckline)
