Mechanics
6/14/2017 P9.001
https://edugen.wileyplus.com/edugen/shared/assignment/test/qprint.uni 1/2
Print by: Amer Almarzooqi
ENGR 213001 Sp17 / HW CH 9
*P9.001
Incorrect
For the following problem, a beam segment subjected to internal bending moments at sections A and B is shown along with a sketch of the crosssectional dimensions. Consider area (1) of the
20in.long beam segment, which is subjected to internal bending moments of MA = 25kip
ft and MB = 34kipft. Assume b=3.1 in., t=0.85 in. and d=16.25 in. (a) Sketch a side view of the beam segment and plot the distribution of bending stresses acting at
sections A and B. Indicate the magnitude of key bending stresses on the sketch. (b) Determine the resultant forces acting in the x direction on Area (1) at sections A and B and show these resultant forces on the sketch.
(c) Is the Area (1) in equilibrium with respect to forces acting in the x direction? If not, determine the horizontal force required to satisfy equilibrium for the specified area and show the location and
direction of this force on the sketch.
Answer Section
(a) On paper, sketch a side view of the beam segment and plot the distribution of bending stresses
acting at sections A and B. Indicate the magnitude of key bending stresses on the sketch. Below, enter the normal stresses at the specified locations. For your entries below, follow the sign
convention for normal stresses.
Answers:
At the top of the upper flange, section A: psi
At the bottom of the upper flange, section A: psi
At the top of the lower flange, section A: psi
At the bottom of the lower flange, section A:
2346 *1
1173 *2
1173 *3
6/14/2017 P9.001
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Question Attempts: Unlimited
psi
At the top of the upper flange, section B: psi
At the bottom of the upper flange, section B: psi
At the top of the lower flange, section B: psi
At the bottom of the lower flange, section B: psi
(b) Below, enter the magnitudes of the resultant forces acting in the x direction on Area (1) at sections A and B. Since you are entering force magnitudes below, enter positive values.
FA = lb
FB = lb
(c) If you believe area (1) is in equilibrium with respect to forces acting in the x direction, enter zero for fh below. If not, determine the horizontal force required to satisfy equilibrium for area (1). Enter the value as positive if a force directed from A to B is required for equilibrium, or negative if a force directed from B to A is required.
fh = lb
Answer *1: the tolerance is +/2% Answer *2: the tolerance is +/2% Answer *3: the tolerance is +/2% Answer *4: the tolerance is +/2% Answer *5: the tolerance is +/2% Answer *6: the tolerance is +/2% Answer *7: the tolerance is +/2% Answer *8: the tolerance is +/2% Answer *9: the tolerance is +/2% Answer *10: the tolerance is +/2% Answer *11: the tolerance is +/2%
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1676 *4
5457 *5
1676 *6
1676 *7
1676 *8
16911 *9
22999 *10
6088 *11