A sample of material is subjected to a stress-strain test. During the test the strain observed at a stress of 16,500 psi is 0.000550 inches per inch. What is this material if the test is run within the elastic range of the stress-strain curve?
2007-06-14 12:13:43 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
E= Stress/Strain = Modulus of Elasticity
E= 16,500/0.000550 = 30,000,000 psi
Therefore the material is structural carbon steel or equal.
2007-06-14 12:27:01 · answer #1 · answered by gatorbait 7 · 1⤊ 0⤋
Its a result of dislocations within the crystal matrix of the material. Imagine the particles of the material are rows marbles trying to slide over one another. Once a row has gotten over the "hump" of the row beneath it, it can move more easily. This is an analogy of what is happening at a molecular level to the bonds holding the material together of course, but it is a useful way of thinking of it.
2016-05-20 22:22:47 · answer #2 · answered by madie 3 · 0⤊ 0⤋
E = 16500/.00055 = 29 M PSI
This value is close to that found for steels and irons
2007-06-14 12:20:32 · answer #3 · answered by telsaar 4 · 0⤊ 0⤋