Midterm1 - Time:3:35to4:55 MAE131A/SE110AFALL2009 Midterm#1

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
MAE 131A/SE110A – FALL 2009 Mid term #1 Thursday Oct. 22, 2009 Time: 3:35 to 4:55 Problem 1 (5 points) Consider a bar of rectangular cross-section subjected to an axial force that produces an axial stress of 50MPa. a. (1.5 points): If the normal cross-sectional area (light blue) is 15,000mm 2 , find the area of a section inclined at an angle of 30 degree with respect vertical axis, as shown in Figure 1. b. (1.5 points): Find the normal and shear stresses acting on the inclined section in terms of the total force P . c. (2 points) If the upper and lower sections are glued on the inclined section and the glue can carry 500kPa normal stress, find the maximum value of the force P that can be applied. Problem 2 (6 points) A wooden post of cross-sectional area 16in² and a steel bar of cross- sectional area 0.5in² are connected to a rigid plate. The elastic modulus of the wood and the steel are 1,900ksi and 29,000ksi, respectively. At the rigid plate between the two members, a concentrated load of 12kips is applied downward. Neglect the
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/05/2011 for the course MAE MAE 131A taught by Professor Vladolubarda during the Spring '10 term at UCSD.

Page1 / 2

Midterm1 - Time:3:35to4:55 MAE131A/SE110AFALL2009 Midterm#1

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online