Answered: Experience in non-destructive testing…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Experience in non-destructive testing of 7075-T651 aluminum (Sy = 72 ksi, KIC = 22 ksi in1/2) pressurized pipes dictates that the minimum detectable longitudinal crack length is 10 mm. Thus, a longitudinal crack of length 10 mm could escape detection and be present at any time. The pipes transmit a flow of natural gas and the presence of a crack would not alter the internal pressure. What maximum internal pressure would you recommend? Neglect the pipe curvature
when determining the stress intensity factor.

O
inside diameter 10.0 in
wall thickness 0.25 in
crack extends completely through the
wall

Expert Solution

Step 1 Given

The yield strength is $S_{y} = 72 k s i$ .

The inside diameter is $D = 10 i n$ .

The thickness of the cylinder $t = 0.25 i n$

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