Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Drive shafts in cars are generally made of steel. An automobile manufacturer is seriously thinking of changing the material to a composite material. The reasons

Drive shafts in cars are generally made of steel. An automobile manufacturer is seriously thinking of changing the material to a composite material. The reasons for changing the material to composite materials are that composites: reduce the weight of the drive shaft and thus reduce energy consumption, are fatigue resistant and thus have a long life, are noncorrosive and thus reduce maintenance costs and increase life of the drive shaft, allow single piece manufacturing and thus reduce manufacturing cost. The design constraints are as follows: 1. Based on the engine overload torque of 140 N-m, the drive shaft needs to withstand a torque of 550 N-m. 2. The shaft needs to withstand torsional buckling. 3. The shaft has a minimum bending natural frequency of at least 80 Hz. 4. Outside radius of drive shaft = 50 mm. 5. Length of drive shaft = 148 cm. 6. Factor of safety = 3. 7. Only 0, +45, 45, +60, 60, and 90 plies can be used. For steel, use the following properties: Youngs modulus E = 210 GPa, Poissons ratio = 0.3, Density of steel = 7800 kg/m3, Ultimate shear strength ult = 80 MPa. For the composite, use properties of glass/epoxy from Table 2.1 and Table 3.1 and assume that ply thickness is 0.125 mm. (A). Design the drive shaft using: 1. Steel 2. Glass/epoxy 3. Graphite/epoxy laminate with ply properties given in Table 2.1. (B). If minimizing mass is still an issue, would a graphite/epoxy laminate be a better choice than glass/epoxy? (C). If cost is the only issue, is glass/epoxy laminate, steel, or graphite/epoxy the best choice? Assume total manufacturing cost of graphite/epoxy is five times that of glass/epoxy on a per-unit mass basis and that the glass/epoxy and steel cost the same on a per-unit-mass basis

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Fundamental Cornerstones Of Managerial Accounting

Authors: Dan L. Heitger, Maryanne M. Mowen, Don R. Hansen

1st Edition

ISBN: 0324378068, 9780324378061

More Books

Students also viewed these Accounting questions

Question

Explain the difference between the primary key and the foreign key

Answered: 1 week ago

Question

Write a Python program to check an input number is prime or not.

Answered: 1 week ago

Question

Write a program to check an input year is leap or not.

Answered: 1 week ago

Question

Write short notes on departmentation.

Answered: 1 week ago