SIMULATION AND ANALYSIS OF THE BUCKLING BEHAVIOR OF A STIFF FILM/COMPLIANT SUBSTRATE COMPOSITE UNDER IN-PLANE COMPRESSION: Fid-Bau Portal

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SIMULATION AND ANALYSIS OF THE BUCKLING BEHAVIOR OF A STIFF FILM/COMPLIANT SUBSTRATE COMPOSITE UNDER IN-PLANE COMPRESSION

NIU HongWei / ZHANG Shuai / WEN Min

The thin film composite often buckles due to mismatch strain between each layer induced by in-plane residual stress during manufacturing or service loadings in operation. The buckling behavior of a composite structure consisting of a thin film and a compliant substrate was studied by elastic stability analysis based on complex function theory. The buckling parameters under uniaxial and biaxial in-plane compression were calculated respectively utilizing an author compiled program. The result indicates the critical pre-buckling stress is an inherent characteristic determined by material and geometric parameters. Under uniaxial and non-equal biaxial compression stress,the critical pre-buckling stress decreases with the increase of film/substrate elastic modulus ratio,meanwhile there is only one nonzero buckling wave number in the direction of the plane. For the equal biaxial stress,the influence factors of critical pre-buckling stress and dimensionless wavelength depend on substrate/film thickness ratio. Any buckling mode that satisfied with the wave number equation could occur.

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SIMULATION AND ANALYSIS OF THE BUCKLING BEHAVIOR OF A STIFF FILM/COMPLIANT SUBSTRATE COMPOSITE UNDER IN-PLANE COMPRESSION

NIU HongWei / ZHANG Shuai / WEN Min

The thin film composite often buckles due to mismatch strain between each layer induced by in-plane residual stress during manufacturing or service loadings in operation. The buckling behavior of a composite structure consisting of a thin film and a compliant substrate was studied by elastic stability analysis based on complex function theory. The buckling parameters under uniaxial and biaxial in-plane compression were calculated respectively utilizing an author compiled program. The result indicates the critical pre-buckling stress is an inherent characteristic determined by material and geometric parameters. Under uniaxial and non-equal biaxial compression stress,the critical pre-buckling stress decreases with the increase of film/substrate elastic modulus ratio,meanwhile there is only one nonzero buckling wave number in the direction of the plane. For the equal biaxial stress,the influence factors of critical pre-buckling stress and dimensionless wavelength depend on substrate/film thickness ratio. Any buckling mode that satisfied with the wave number equation could occur.

SIMULATION AND ANALYSIS OF THE BUCKLING BEHAVIOR OF A STIFF FILM/COMPLIANT SUBSTRATE COMPOSITE UNDER IN-PLANE COMPRESSION

NIU HongWei / ZHANG Shuai / WEN Min

The thin film composite often buckles due to mismatch strain between each layer induced by in-plane residual stress during manufacturing or service loadings in operation. The buckling behavior of a composite structure consisting of a thin film and a compliant substrate was studied by elastic stability analysis based on complex function theory. The buckling parameters under uniaxial and biaxial in-plane compression were calculated respectively utilizing an author compiled program. The result indicates the critical pre-buckling stress is an inherent characteristic determined by material and geometric parameters. Under uniaxial and non-equal biaxial compression stress,the critical pre-buckling stress decreases with the increase of film/substrate elastic modulus ratio,meanwhile there is only one nonzero buckling wave number in the direction of the plane. For the equal biaxial stress,the influence factors of critical pre-buckling stress and dimensionless wavelength depend on substrate/film thickness ratio. Any buckling mode that satisfied with the wave number equation could occur.

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Title:

SIMULATION AND ANALYSIS OF THE BUCKLING BEHAVIOR OF A STIFF FILM/COMPLIANT SUBSTRATE COMPOSITE UNDER IN-PLANE COMPRESSION

Contributors:

NIU HongWei (author) / ZHANG Shuai (author) / WEN Min (author)

Published in:

Jixie qiangdu, Vol 42, Pp 404-413 (2020)

Publication date:

2020

ISSN:

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Keywords:

Thin film , Buckling , Substrate , Elastic stability , Thickness ratio , Critical buckling stress , Wave length , Mechanical engineering and machinery , TJ1-1570 , Materials of engineering and construction. Mechanics of materials , TA401-492

Metadata by DOAJ is licensed under CC BY-SA 1.0

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