Reference no: EM1380841
Problem:
A tension link shown to the right is used in earth-moving equipment and is subjected to cyclic stresses varying from 10 ksi to 35 ksi. The link contains an internal crack that is 4 in long. If the link is made from A517 steel (σys=110 ksi and Kic= 170 ksi.in1/2), do the following:
a) Determine the factor of safety against net section yield in the presence of the crack.
b) Determine the factor of safety against brittle fracture for the same conditions.
c) If the maximum stress were increased (due to an accidental overload), which would occur first, net section yield or brittle fracture? Explain.
d) For Paris law coefficient of C=0.66 x 10-8 and n = 2.25, where stress is measured in ksi and crack growth in inches, estimate the number of cycles needed to grow the crack by the amount of 0.1 in.
e) If you were the engineer responsible for analyzing the life of this part, what would be your recommendation for continued service of this part (e.g. stopping using it immediately, repair or continue using it until next inspection, etc.)? Justify your decision based on sound engineering principles.
|
Discussion on computer future
: After reading about programming languages and their capabilities, consider all of the devices in your home that have a computer. Where will computer programming and the use of computers go in the future?
|
|
What is the average time spent by each order waiting
: What is the average time spent by each order waiting to be processed? Assume that the orders coming in are either small or large
|
|
Data storage question
: It is true that computer storage is getting bigger and faster, discuss how does that help us? As we start saving more and more data, it is really possible for the average person to keep all of the data organized?
|
|
Evaluate the risks to plastic dollars of programmed threats
: Amanda and Chris McDermott own a small business, Plastic Dollars, which produces and maintains stored value cards for retailers. Most of the cards they sell are gift cards, such as those available in various restaurants and stores.
|
|
Determine the factor of safety against brittle fracture
: Determine the factor of safety against net section yield in the presence of the crack and determine the factor of safety against brittle fracture for the same conditions.
|
|
Object oriented programming paradigm
: Discuss and explain why the object oriented programming paradigm is considered a better choice than the structured programming paradigm.
|
|
How many units of product have to be sold in order to break
: If the company sells at a price of $25, how many units of product have to be sold in order to break even? [algebraic approach only]. If the company sells 10,000 mops at the product price of $25, what will be the contribution to profit?
|
|
Industry specific applications
: Does Microsoft's entry into industry-specific applications signal end for smaller industry specific software developers? What changes in strategy through such developers are necessary to compete with Microsoft?
|
|
Henri manufacturing must decide whether to insource
: Henri Manufacturing must decide whether to insource or outsource a new toxic-free miracle carpet cleaner that works with its Miracle Carpet Cleaning Machine.
|