3
votes
2answers
55 views

Tensile strength of a braided steel wire vs. a solid steel bar?

I am wondering which one is the strongest between a steel rope and a steel bar with same diameter and made of the same steel? EDIT : The test could be: attach rope/bar to ceiling and suspend a mass ...
2
votes
1answer
95 views

Pressure applied to flat plate

I have a question about the pressure placed on a plate of material X, how the force is distributed and what would be the material property that would determine its failure. To simplify things ...
1
vote
1answer
1k views

Calculating force absorbed by compression of a material (i.e. rubber)

Say I was trying to design padding to absorb impacts using polymers or similar materials, such as rubber. I have a good understanding of any relevant physics, most likely, but I wouldn't know where to ...
5
votes
1answer
105 views

Force problem related to adhesive and bonding

I have two PCBs (printed circuit board), and they are glued by adhesives, as show in the pictures. And the location of the adhesives are indicated on the picture (please notice that NO adhesive is ...
2
votes
4answers
295 views

How does water carve rock?

(More generally, how does a soft material carve a hard material?) Obviously it happens, but is it a continual process (every drop of soft water carries away a minute amount of hard material) or is it ...
0
votes
2answers
997 views

Calculate the weight a simple plank can support [closed]

I'd like to build a simple desk; just a single plank of wood (or a few side-by-side) with solid supports on each end of the desk. What I'm trying to figure out is how thick a plank I want to use for ...
3
votes
3answers
1k views

Optimal technique to tear perforated paper along the perforation [closed]

My daughter's coloring book has perforated pages, so you can easily rip out the pages for easier coloring action. Great. Trouble is, the perforation isn't enough, and it's almost impossible to rip ...