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What is creep?

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in Aircraft Design by (700k points)
What is creep?

(a) Under low sustained stress, it is tendency of some materials to get deform slowly and permanently

(b) Under zero stress, it is permanent deformation

(c) High lift device

(d) Anti ice device

I have been asked this question in unit test.

The query is from Structures topic in portion Structures and Loads of Aircraft Design

1 Answer

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Right choice is (a) Under low sustained stress, it is tendency of some materials to get deform slowly and permanently

Easy explanation: Creep is nothing but the tendency of some materials to get deform slowly and permanently under low but sustained stress. For most of materials used in aerospace, creep is a problem at elevated temperatures. Although some titanium, plastics will exhibit creep at room temperatures.

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