Home / Questions / The force required to compress a cylindrical solid between flat parallel dies see Figure 1...
The force required to compress a cylindrical solid between flat parallel dies (see Figure 16-10) has been estimated (by a theory of plasticity analysis) to be
where:
R ¼ radius of the cylinder
T ¼ thickness of the cylinder
so ¼ yield strength of the material
m ¼ friction factor (between 0 and 1 where 0 is frictionless and 1 is complete sticking)
An engineering student is attempting to impress his date by demonstrating some of the neat aspects of metal forming. He places a shiny penny between the platens of a 60,000-lb capacity press and proceeds to apply pressure. Assume that the coin has a 3 4-in. diameter and is 1 16 in. thick. The yield strength is estimated as 50,000 psi, and because no lubricant is applied, friction is that of complete sticking, or m ¼ 1.0.
a. Compute the force required to induce plastic deformation.
b. If this force is greater than the capacity of the press (60,000 lb), compute the pressure when the full-capacity force of 60,000 lb is applied.
c. If the press surfaces are made from thick plates of steel with a yield strength of 120,000 psi, describe the results of the demonstration.
d. A simple model of forging force uses the equation:
where:
K ¼ a dimensionless multiplying factor
so ¼ yield strength of the material
A ¼ projected area of the forging
K is assigned a value of 3–5 for simple shapes without flash, 5–8 for simple shapes with flash, and 8–12 for complex shapes with flash. Consider the two equations for forging force and discuss their similarities and differences.
May 19 2020 View more View Less
Economics models that assume that wages and prices adjust freely to changes in demand and supply are known as ______________________models .
May 25 2018Rita Colwell, the scientist who discovered why cholera out- breaks often occur during an El Niño, is concerned that global climate change could increase the incidence of ...
Jul 04 2021HRPO 2301 Essay three Question 2. How does selecting someone to be an expatriate manager differ from selecting one to work domestically?
Jul 21 2020Last year, the retailer’s weekly variance of demand was 200 units. The variance of orders was 500, 600, 750, and 1,350 units for the retailer, wholesaler, distributor, an...
Jul 24 2020The net operating income (NOI) for a small income property is expected to be $150,000 for the first year. Financing will be based on a 1.2 debt coverage ratio applied to ...
Dec 02 2019Finding a Derivative Explain how to find the derivative of the function
Jul 30 2021Curl of a Cross Product In Exercises 69 and 70, find
Aug 15 2021Describe organizational factors that might constrain decision makers.
Jul 10 2020A savings and loan associate has $600 in check able deposits $1,880 in home loans $1,100 in savings deposits $600 in government securities $850 in time deposits $...
Nov 10 2017Aggregate spending on south African production comprises:
Apr 13 2021