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Stiffness Change as a Nondestructive Damage Measurement

O’Brien, T. Kevin

Abstract In laboratory specimens, damage growth is generally accompanied by stiffness change. Hence, damage growth can be monitored indirectly through stiffness. Furthermore, stiffness measurements are both nondestructive and easier to apply than most NDI methods that measure damage directly. This paper highlights laboratory applications of stiffness measurement for indirect assessment of damage growth and, in some special cases, for failure prediction. Examples cited are buckling of compressively loaded cylindrical shells, slow stable crack growth in tension-loaded notched coupons, fatigue-crack growth in adhesively bonded materials, and fatigue-damage growth in composite materials.

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Stiffness Change as a Nondestructive Damage Measurement

O’Brien, T. Kevin

Abstract In laboratory specimens, damage growth is generally accompanied by stiffness change. Hence, damage growth can be monitored indirectly through stiffness. Furthermore, stiffness measurements are both nondestructive and easier to apply than most NDI methods that measure damage directly. This paper highlights laboratory applications of stiffness measurement for indirect assessment of damage growth and, in some special cases, for failure prediction. Examples cited are buckling of compressively loaded cylindrical shells, slow stable crack growth in tension-loaded notched coupons, fatigue-crack growth in adhesively bonded materials, and fatigue-damage growth in composite materials.

Stiffness Change as a Nondestructive Damage Measurement

O’Brien, T. Kevin

Abstract In laboratory specimens, damage growth is generally accompanied by stiffness change. Hence, damage growth can be monitored indirectly through stiffness. Furthermore, stiffness measurements are both nondestructive and easier to apply than most NDI methods that measure damage directly. This paper highlights laboratory applications of stiffness measurement for indirect assessment of damage growth and, in some special cases, for failure prediction. Examples cited are buckling of compressively loaded cylindrical shells, slow stable crack growth in tension-loaded notched coupons, fatigue-crack growth in adhesively bonded materials, and fatigue-damage growth in composite materials.

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Title:

Stiffness Change as a Nondestructive Damage Measurement

Contributors:

O’Brien, T. Kevin (author)

Published in:

Mechanics of Nondestructive Testing ; 101-121

Publication date:

1980-01-01

Size:

21 pages

ISBN:

978-1-4684-3859-8 , 978-1-4684-3857-4

DOI:

https://doi.org/10.1007/978-1-4684-3857-4_4

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Crack Length , Cylindrical Shell , Stiffness Measurement , Failure Prediction , Damage Growth Engineering , Nanotechnology and Microengineering , Characterization and Evaluation of Materials , Materials Science, general

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