- #1
ahmeeeeeeeeee
- 21
- 0
hello ,
when we say that (stress) = dF/dA
If F is variable(And I guess it must be variable) = Kx, what is the value of stress at any time ? I mean what is the "dA" we divide on ? or what is the basic givens I must have in order to calculate the stress ?? , and why it is written sometimes just (stress)= F/A ??
and at this example What is the F(initial / final / avergae) and what is the A(initial / final / average)
2- when we say that the potential energy per unit volume =
W/AXo = .5*(F/A)*(X/Xo) = .5 stress* strain
What is "A" ?? IS it the original A before applying the force ??
Or is is the "A" after moving the (delta X) ??
when we say that (stress) = dF/dA
If F is variable(And I guess it must be variable) = Kx, what is the value of stress at any time ? I mean what is the "dA" we divide on ? or what is the basic givens I must have in order to calculate the stress ?? , and why it is written sometimes just (stress)= F/A ??
and at this example What is the F(initial / final / avergae) and what is the A(initial / final / average)
2- when we say that the potential energy per unit volume =
W/AXo = .5*(F/A)*(X/Xo) = .5 stress* strain
What is "A" ?? IS it the original A before applying the force ??
Or is is the "A" after moving the (delta X) ??