The blister test for interface toughness measurement
Identifieur interne : 002005 ( Main/Exploration ); précédent : 002004; suivant : 002006The blister test for interface toughness measurement
Auteurs : Henrik Myhre Jensen [Danemark]Source :
- Engineering Fracture Mechanics [ 0013-7944 ] ; 1991.
English descriptors
- Teeft :
- Adhesive fracture mechanics, Approximate solution, Basic crack, Basic results, Blister, Blister test, Boundary conditions, Central deflection, Central load, Central point load, Constant pressure, Corresponding values, Crack front, Debond, Debond radii, Debond zone, Deflection, Edge crack, Elastic constants, Elastic properties, Energy release rate, Experimental procedure, External loads, Form expression, Form solutions, Fracture, Fracture criterion, Fracture process, Fracture toughness, Good approximation, Henrik myhre jensen, Horizontal displacement, Hydrostatic, Hydrostatic pressure, Interface, Interface crack, Interface toughness measurement, Intermediate range, Karman equations, Large pressure limit, Linear range, Many cases, Membrane limit, Membrane stress, Membrane stresses, Mixity, Mode dependence, Mode mixity, Mode mixity parameter, Numerical results, Numerical solutions, Point load, Present purpose, Present work, Previous section, Pure mode, Residual stresses, Simple theory, Small deflections, Small displacement range, Stress function, Theoretical predictions, Thin film, Toughness.
Abstract
Abstract: The blister test for the measurement of interface fracture toughness for a thin film bonded to an elastic substrate has been analyzed. The load applied in order to debond the film is either hydrostatic pressure or a point load. Results for the energy release rate and mixity of modes 1 and 2 for the interface crack are presented for cases where the debond has been initiated and extends several film thicknesses. Analytical results are given in the two extremes of very small film deflections (weak interfaces) and very large film deflections (tough interfaces). Numerical results are presented in the intermediate zone based on the non-linear von Karman equations. Arbitrary and independent values of the elastic constants of the film and the substrate are allowed in the analysis. These basic crack tip quantities, energy release rate and mode mixity, may be used in a proper fracture criterion which incorporates the strong dependence of mode mixity for interface cracks.
Url:
DOI: 10.1016/0013-7944(91)90144-P
Affiliations:
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The load applied in order to debond the film is either hydrostatic pressure or a point load. Results for the energy release rate and mixity of modes 1 and 2 for the interface crack are presented for cases where the debond has been initiated and extends several film thicknesses. Analytical results are given in the two extremes of very small film deflections (weak interfaces) and very large film deflections (tough interfaces). Numerical results are presented in the intermediate zone based on the non-linear von Karman equations. Arbitrary and independent values of the elastic constants of the film and the substrate are allowed in the analysis. These basic crack tip quantities, energy release rate and mode mixity, may be used in a proper fracture criterion which incorporates the strong dependence of mode mixity for interface cracks.</div></front></TEI><affiliations><list><country><li>Danemark</li></country></list><tree><country name="Danemark"><noRegion><name sortKey="Jensen, Henrik Myhre" sort="Jensen, Henrik Myhre" uniqKey="Jensen H" first="Henrik Myhre" last="Jensen">Henrik Myhre Jensen</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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