Homework #1
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is September 22, 2015.
1. (10 points) Explain the design principle for mechanical engineering bys answering the
following questions.
a. What are the 12 unknowns in mechanical system?
b

Homework #10
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is December 15, 2015.
1. (6 points) The load-deformation diagram shown in Figure 1 has been drawn from
data obtained during a tensile test of a 16-mm-diameter rod of structural steel.

Homework #9
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is December 18, 2015.
1. (6 points) The steel rod BC is attached to the right bar AB and to the fixed support at
C as shown in Figure 1. Knowing that G = 77 GPa, determine the diameter

Homework #8
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is December 1, 2015.
1. (6 points) The rigid bar DEF is welded at point D to the rolled-steel beam AB. For the
loading shown in Figure 1, using E = 200 GPa, determine
(a) the slope at

Homework #6
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is November 24, 2015.
1. (6 points) For the cantilever beam and loading shown in Figure 1, determine
(a) the equation of the elastic curve for portion AB of the beam,
(b) the deflectio

Homework #6
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is November 10, 2015.
1. (6 points) For the given Figure 1, neglecting the effect of fillets and of stress
concentrations,
(a) determine the smallest permissible diameters of the solid

Homework #5
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is October 29, 2015.
1. (6 points) Two steel plates of uniform cross section 10 80 mm are welded together
as shown in Figure 1. Knowing that centric 100-kN forces are applied to the we

Homework #4
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is October 20, 2015.
1. (6 points) For the beam and loading shown in Figure 1, consider section nn and
determine
(a) the largest shearing stress in that section, and
(b) the shearing s

Homework #3
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is October 8, 2015.
1. (6 points) Two vertical forces are applied to a beam of the cross section shown in
Figure 1. Determine the maximum tensile and compressive stresses in portion BC

Homework #2
MECH 245 Solid Mechanics II
Total 40 points (4%). Due date is October 3, 2015.
1. (6 points) A couple M of magnitude 1500 Nm is applied to the crank of an engine. For
the position shown in Figure 1, determine (a) the force P required to hold t