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Unformatted text preview: Peel Introduction to Mechanics of Materials
Meeh 260 — Sections 101 and 102
Midterm Quiz #1:  Name: 7 r ' Student ID #: October 6, 2008 Instructions: Answer all questions. Indicate units where applicable and draw a box around
' your answers. Show all work. One “8 ’A x 11 ” handwritten formula sheet is allowed, with
writing allowed on both sides. Use the backs of the exam sheets if more space is needed for
'5 the solutions. Time allowed is 5 0 minutes. Total marks == 20. _
No communication devices allowed. A maximum of 2 extra points may be given for neat and Q(
a 7' orderly presentation.  i Question 1. "(8 Painis) The frame in the ﬁgure on the right is subjected to a symmetric triangular distributed loading. Determine the required diameter of the pins at supports A and C
if the allowable shear stress for the material used is ‘ “canow x 100 MPa. Both pins are subjected to double
shear. . . _  ' '  ngngrébm: {Use back of page if neeessary, number the pages, d0_not remove the staple, work neatly.) SP ﬁfe (a) or (A), (raj (b):
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may be considered rigid and unaffected by temperature changes. The properties for the rods are as follows:
Bronze Aluminium
Rod AB CD
Length (mm) 300 300
Diameter (mm) 4 4
Modulus of Elasticity (GPa) 103 69
Coeff. of Thermal ExpansiOn (10'6 /"C) 1'? 24
Initial Temperature (°C) 20 20 13) Determine the gap width, 3, required so that the switch will close when the temperature reaches
1 10°C? P n 0 Using the gap distance solved in part a), determine the reduired horizontal force, P, applied at
point F to close the gap with the assembly at the original temperature of 20°C (no change .in
temperature). Note: If you could not determine a gap width from part a), use 3 = 1m. 400 mm (Use back of page if necessary, number the pages, do not remove the steple, work neatly.) Z: WI7§LMZ
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This note was uploaded on 03/28/2012 for the course MECH 260 taught by Professor Ross during the Spring '12 term at The University of British Columbia.
 Spring '12
 ROSS
 Statics

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