Engineering College

Consider a hot working operation in which there is no work hardening, but the flow stress is sensitive to the strain rate. Calculate the maximum strain rate that can be used in the deformation if the flow stress cannot exceed 210 MPa. The strength constant is 175 MPa, and the strain rate sensitivity exponent is 0.1. Assume that there is no effect of friction with the tooling. (2 points)

Answers

Answer 1

Explanation:

You can use Hollomon's equation to estimate this.

Y_f is the flow stress.

K is the strenght coefficient or constant.

e is the strain

n is the strain hardening exponent.

You should be able to solve for e given the data in the problem statement.

Related Questions

During a storm, gage station A was inoperative but the surrounding stations, B, C, and D, recorded rainfall of 5.2, 4.5, and 6.1 in., respectively. The average annual precipitation for stations A, B, C, and D are 48, 53, 59, and 67 in., respectively. Estimate the storm precipitation for station A.

Answers

Answer:

4.247 in

Explanation:

Precipitation at A is P_a

similarly at P_b= 5.2 in, P_c= 4.5 in and P_d= 6.1 in

Normal annual rainfall at station A, B, C, D are

N_a = 48 in, N_b= 53, N_c= 59 in and N_d= 67 in

From the formula we have

P_a/N_a = 1/3( P_b/N_b+P_c/N_c+P_d/N_d)

⇒ P_a = 48/3(5.2/53+4.5/59+6.1/67)

P_a= 16×0.2654 = 4.247 in

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