Consider the brass alloy the stress-strain behavior of which is
shown in the Animated Figure 6.12. A cylindrical specimen of this
alloy 19 mm in diameter and 177 mm long is to be pulled in tension.
Calculate the force necessary to cause a 0.00969 mm reduction in
diameter. Assume a value of 0.34 for Poisson's ratio.
For a bronze alloy, the stress at which plastic deformation
begins is 300 MPa and the modulus of elasticity is 115 GPa.
What is the maximum load (in kN) that may be applied to a specimen
having a cross-sectional area of 70 mm2 without plastic
deformation?
And if the original specimen length is 100 mm, what is the
maximum length (in mm) to which it may be stretched without causing
plastic deformation?
1. Residual stress refers to stresses induced by
plastic strain. T or F
2. Failure criteria is identical for ductile and brittle materials.
T or F
3. Statically indeterminate problems can be solved by using
additional equations provided by Hooke's Law. T or F.
4. To analyze stress at any point of any component or structure ,
one should consider:
5. The stress developed in a cylindrical pressure vessel along the
longitudinal axis is:
5. Assume the demand for plastic surgery is price inelastic. Are
the following statements true of false? Explain.
a. When the price of plastic surgery increases, the number of
operations decreases.
b. The percentage change in the price of plastic surgery is less
than the percentage change in quantity demanded.
c. Changes in the price of plastic surgery do not effect the
number of operations.
d. Quantity demanded is quite responsive to changes in
price.
e. If more plastic surgery...
All of the following are true of general adaptation syndrome
except:
When stress levels are low, the body is often in a state of
homeostasis
Body systems don't operate smoothly to maintain
equilibrium
Stressors trigger a crisis-mode physiological response, after
which the body attempts to return to homeostasis
General adaptation syndrome has three p
Please determine if the following statement is true or false,
and explains why.
1. Effective stress is defined as total stress minus pore
pressure.
2. For a given consolidation stress, a normally consolidated
clay will be stronger than an overconsolidated clay.