Engin 36 Final Exam Take Home Exam May 15, 2020 Laney Colleg ✓ Solved

Engin 36 Final Exam Take Home Exam May 15, 2020 Laney College

Read all of the instructions below before starting the exam

1. Turn in the exam on Canvas by 5:00 PM on Wednesday, May 20. 2. Be sure to read the instructions for each problem carefully. Read the question statement fully and be sure to answer all components of the question.

3. You may use your homework, class notes, the textbook, references posted to Canvas, and other study references as you work through the exam. You may not consult with classmates. 4. Show all of your work! It’s much easier for me to give you partial credit if you clearly document all of your steps when solving a problem. 5. Remember to write your units in your answer! 6. Box your answers! 7. If you run into algebra or math problems, write how you would have continued to solve the problem to receive partial credit. Sign the honor statement below after finishing the exam (a digital “signature” is acceptable) I have neither given nor received help on this work, nor am I aware of any infraction of the Honor Code.

Problem 1

A sign is supported on a hollow steel post that is fully fixed at its base, as shown in the diagram. The internal forces and geometric properties shown were computed in the last exam. The post has dimensions and properties as follows: W = 6,000 lbs, I = 32.8 in⁴, A = 6.94 in². The geometric properties include a 4" thickness and a 6" outer diameter.

The hollow steel post is replaced by a wood post with two steel plates fastened to the faces. Using all work, find:

• (a) The normal stress in the steel at the point labeled Asteel caused by bending only.
• (b) The normal stress in the wood at the point labeled Awood caused by bending only.
• (c) If the normal stress due to axial load is disregarded, is the composite member adequate? Why?
• (d) What equations would you use to find the normal stress in the wood and the steel? (Remember compatibility relationships)

Given Material Properties: Esteel = 29,000 ksi, Ewood = 1,200 ksi. Internal force N = 6 kips, bending moment M = 432 kip-in. The steel and wood are subjected to combined stresses due to bending and axial loads, and the compatibility of strains must be considered to assess the stresses accurately in the composite members.

Problem 2

The sign post from Problem 1 is now braced by cable KM, which is tensioned with a force of 3,000 lbs. The forces are distributed at point K, and the geometric configuration involves an 8' by 6' cross-section with a detailed force diagram.

(a) Draw the free-body diagram (FBD) of forces at point K: Normal Force (N), Shear Force (V), Bending Moment (M).

(b) Draw the internal force diagrams for shear, moment, and normal force.

(c) Draw the stress profiles for shear stress and normal stress due to bending and axial forces. You only need to sketch the shapes; magnitudes are not necessary.

(d) Draw the stress state at Point A, indicating the normal and shear stresses, following the positive sign conventions.

(e) Draw Mohr's circle for the stress state at Point A. Label the principal stresses and the maximum shear stress.

Assignment: Review selected colleagues' posts concerning best practices and activities required for successful management of business information systems. Respond to at least two colleagues by explaining similarities or differences in analysis, challenges or enablers of aligning IT with business strategy, or additional best practices and tools for continuous monitoring of strategy alignment, supported by citations.

Response to first colleague discusses communication, collaboration, strategic alignment, infrastructure, and risk management, referencing Munro and Khan (2013), Karin (1998), and other sources.

Response to second colleague emphasizes the importance of understanding IT's role in strategy, benchmarking, structure, leadership, communication, and innovation, citing Balakrishnan (2012), Munro and Khan (2013), and others.

References

• Balakrishnan, M. (2012, September 30). Leadership. Retrieved from https://example.com/leadership
• Karin, B. (1998). Can you align IT with business strategy? Strategy & Leadership, 26(5), 16–20.
• Munro, M., & Khan, S. (2013). WestJet Airlines: Information technology governance and corporate strategy (Ivey Publishing Case Study No. 9B13E020).
• Additional credible references to be added based on scholarly articles, textbooks, and industry reports supporting strategic IT alignment and business management.