2-41. A new high-temperature alloy is to be used for a 3-mm diameter tensile sup

Question

2-41. A new high-temperature alloy is to be used for a 3-mm diameter tensile support member for an impact-sensitive instru- ment weighing 900 N. The instrument and its support are to be enclosed in a test vessel for 3000 hours at 871 degree(celsius). A laboratory test on the new alloy used a 3-mm diameter specimen loaded by a 900 N weight. The specimen failed due to stress rupture after 100 hours at 982 degree(celsius). Based on the test results, determine whether the tensile support is adequate for the application.

Txt book

Mechanical Design of Machine Elements and Machines, Second Edition, by Jack A. Collins,

Henry Busby, and George Staab, John Wiley & Sons, 2010.

Explanation / Answer

Safety factor for temperature in this case = 982/871 = 1.1274 => OK

Though we can use this support but it would depend on the guidelines of the required safety factor.

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