The engineering designer must create (invent) the concept and connectivity of the elements that constitute a design, and not lose sight of the need to develop ideas with optimality in mind. A useful design attribute can be cost, which can be related to the amount of material used (volume or weight). When you think about it, the weight is a function of the geometry and density. When the design is solidified, finding the weight is a straightforward, sometimes tedious task. The figure depicts a simple bracket frame that has supports that project from a wall column. The bracket supports a chain-fall hoist. Pinned joints are used to avoid bending. The cost of a link can be approximated by $ = ¢Alγ , where ¢ is the cost of the link per unit weight, A is the cross-sectional area of the prismatic link, l is the pin-to-pin link length, and γ is the specific weight of the material used. To be sure, this is approximate because no decisions have been made concerning the geometric form of the links or their fittings. By investigating cost now in this approximate way, one can detect whether a particular set of proportions of the bracket (indexed by angle θ) is advantageous. Is there a preferable angle θ? Show that the cost can be expressed as
where W is the weight of the hoist and load, and S is the allowable tensile or compressive stress in the link material (assume S = |Fi /A| and no column buckling action). What is the desirable angle θ corresponding to the minimal cost?
(a) A chain-hoist bracket frame.
(b) Free body of pin.
Select a specific organization of interest to you and identify a quality management related problem(s) in the firmMar 21 2020
How could Toyota use performance-based pricing to determine a price that would create a good value for customers and a good price for Toyota?Nov 27 2019
Tina purchases a new computer by financing it on the no payment until next yea plan The cash price of the computeris The financing agreement requires equal payments every...Feb 15 2020
Jake just bought a car for $15 000 and paid in cash. Calculate Jake's opportunity cost as "funds tied up in the car" if you know that otherwise it was possible to invest ...Apr 30 2020
Evaluate the following statement: In the short run, if an economy experiences inflation of 10 percent, the cause of the inflation is unimportant. Whatever the cause, the ...May 01 2020
Conduct a performance analysis with set benchmarks of 50% to 75% per annualized plan. Your analysis should include at least four (4) of the following metrics: tracking do...Aug 08 2020
On July 1, Tommy Wrigley established Wrigley Home Appraisal Services, a firm that provides expert residential appraisals and represents clients in home appraisal hearings...Apr 22 2020
There are 3 issues relating to target markets that are unique to nonprofits. Identify and explain each.*Work Cited Need.Nov 07 2017
On January 1, a store had inventory of $48,000. January purchases were $46,000 and January sales were $95,000. On February 1 a fire destroyed most of the inventory. The r...Apr 22 2020
ABC was a medium-sized Hong Kong-based company with two manufacturing plants in China, one in Dongguan and the other in Shanghai with employees of 3,000. The company was ...Aug 23 2020