stress

stress

1. traction

   • These forces stretch the body on which they act.Traction forces are opposing and are exerted on the outside of the body,in the same direction and the opposite way round

2. compression

   • The forces crush or compress the body on which they act.Compression forces are opposing and are exerted on the inside of the body,in the same direction and the opposite way round.They occur in columns,foundations and washers (used with a nut and bolt)

3. bending

   • When these forces act on a body,they cause it to bend.Beams,bridges and benches are acted on by bending forcess.

4. Torsion

   • These forces have a twisting action on the body.Torsion occurs in axles,screws and corkscrews.

5. Shear

   • Shear forces have a cutting action.They are very close together and are exerted the opposite way round and perpendicular to the object.Shear forces occur in hooks,scissors and lecture chairs.

6. Buckling

   • It occurs in long,thin objects that are acted on by compression. This appears to cause additional twisting.Buckling occurs when we press down on a ruler,a strand of uncooked spaghetti and the side of a doorframe.

7. lucia

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