Bra Physics Part 3: What can we learn about the wires and cradle?
This is Part 3 of my Bra Physics series. In Part 1 , I described the forces involved in supporting your breasts and what parts of a bra are responsible for providing those forces. In Part 2 I introduced the concepts of stress and strain, and applied these and part 1's principles to the design and fit of bands. Now let's move on to the much maligned underwire (and the cradle). In the original Bra Physics post , I didn't talk much about the role of the underwire. The wires are a critical part of the "foundation" of a wired bra, as improper design or fit can cause pain and even injury, as well as reduce the support available in a bra. The underwire's main job is to resist the forces of the band, maintaining a cupped shape despite the bra being under high degrees of tension. Because the underwire is being pulled on by the band, we need to recap the stress and strain concepts discussed in Part 2 . Recap: Stress and Strain The strain of an item is essentially...