Reference no: EM131357989
Optimize the laminate in Exercise 12.6 for minimum weight. Consider alternative laminate configurations among those available in Table 1.5. Specify the number of layers and the thickness of the foam to be used.
Exercise 12.6
Redesign the laminate in Examples 12.4-12.5 on p. 417 by using a sandwich shell. Determine the thickness of the core material and the faces. The core material has a density of 50 kg/m3 , E = 20 MP a, ν = 0.23. The faces are built with one or more layers of M1500 with properties given in Table 1.5. Specify the number of layers to be used.
Example 12.4
Design of a dome. Part I. Compute the stress resultants on the dome. The dome intended to cover communication equipment. A composite material is selected to avoid interference with the signals being transmitted. Housing antennas and other electronics under the roof saves on equipment costs because the electronics does not have to be built for outdoor exposure. The dome must withstand its own weight and the weight of fixtures hanging from it, snow load, and eventual live load of workers performing maintenance. The dome, in the shape of a spherical cap, has span s = 24 m and height h = 2.4 m (Figure 12.4).
Example 12.5
Design of a dome. Part II. Using the results of Example 12.4, determine the thickness required to resist buckling. Assume the stiffness of the material has no variability and it is adequately estimated by using carpet plots. However, if the structure is imperfection sensitive, small imperfections may yield large variations in buckling load. For this reason, a relatively small resistance factor is specified, ? = 0.5. The variability of the loads is accounted for by specifying a load factor α = 1.6. A more refined partition of load factors that takes into account the diverse nature of the loads, i.e, dead, live, and snow loads, is presented in Chapter 13.
How each layer of the model represent the communication flow
: Describe how each layer of the Model/Suite represents the communication flow between organizational levels and across departments/division of an actual hierarchical business.
|
General benefits and costs of relaxing firm credit term
: You have just been hired as the cash manager of the Lamm Company. Your first task is to determine the target cash balance. The firm expects to need $1,000,000 of net new cash during the coming year. What average cash balance is indicated by the Baumo..
|
Benefits and challenges of mobile technology
: Organizations hope to increase productivity and spur growth when they adopt mobile technology. Unfortunately, integrating new technology does not always go as smoothly as some businesses would like. With a wide variety of users and ever-evolving c..
|
Carbon epoxy with a fiber volume fraction
: Compute E1, E2, ν12, and G12 using both the rule of mixtures (ROM) and more accurate formulas recommended in this chapter.
|
Compute the stress resultants on the dome
: Optimize the laminate in Exercise 12.6 for minimum weight. Consider alternative laminate configurations among those available in Table 1.5. Specify the number of layers and the thickness of the foam to be used.
|
How will determine the effectiveness of onboarding program
: Discuss the activities involved in a one day onboarding program for employee orientation including the following: The schedule of activities for one day including the time allotted for each training module.A description of each training module.The ty..
|
Completing the project within various time frames
: Sox engineering designs and constructs air conditioning and heating systems for hospitals and clinics. Sox has estimated the following probabilities of completing the project within various time frames when using each of the three options
|
Considering replacing existing machine
: Grind Co. is considering replacing an existing machine. The new machine is expected to reduce labor costs by $88,000 per year for 5 years. Depreciation on the new machine is $58,000 compared with $44,000 on the old machine. In addition, inventory wil..
|
Porter 5 forces explains michael porter five forces model
: Video and article:What are 'Porter's 5 Forces'explains Michael Porter's five forces model. Video:The Five Competitive Forces That Shape Strategy- Michael Porter discusses his five forces model that is used to describe industry dynamics, which are i..
|