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https://scholarbank.nus.edu.sg/handle/10635/160983
DC Field | Value | |
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dc.title | Micromechanics of void growth and coalescence - Vapor pressure induced failure in thin film and multilayer structures | |
dc.contributor.author | CHONG CHEE WEI | |
dc.date.accessioned | 2019-10-31T18:02:10Z | |
dc.date.available | 2019-10-31T18:02:10Z | |
dc.date.issued | 2005-08-08 | |
dc.identifier.citation | CHONG CHEE WEI (2005-08-08). Micromechanics of void growth and coalescence - Vapor pressure induced failure in thin film and multilayer structures. ScholarBank@NUS Repository. | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/160983 | |
dc.description.abstract | <P>THIS WORK INVESTIGATES VAPOR PRESSURE DRIVEN VOID GROWTH AND COALESCENCE IN TWO TYPES OF MULTILAYER STRUCTURES: I) BIMATERIAL INTERFACE AND II) ADHESIVE JOINT. IT AIMS TO PROVIDE SOME INSIGHTS INTO THE MOISTURE-INDUCED FAILURE A?? A??POPCORNINGA?? IN IC PACKAGING. INCOMPATIBILITY IN MATERIAL PROPERTIES NATURALLY INDUCES A PREDOMINANTLY MODE II LOADING ON INTERFACES. WHEN VAPOR PRESSURE IS SUPERPOSED ON MODE II DOMINANT LOADING, THE BEHAVIOR OF INTERFACE FAILURE IS NOT WELL-UNDERSTOOD TO DATE. PRESENT WORK ADDRESSES THIS KEY ISSUE.</P><P>OUR RESULTS SHOW THAT: I) IN BIMATERIAL INTERFACE, VAPOR PRESSURE CAUSES SEVERAL-FOLD REDUCTION IN THE INTERFACE FRACTURE TOUGHNESS WHEN THE LOADING IS MODE II DOMINANT; II) IN ADHESIVE JOINT, THE PRESENCE OF VAPOR PRESSURE AT A HIGHLY POROUS INTERFACE CAN NEGATE ANY POSSIBLE TOUGHENING CAUSED BY LARGE FILM THICKNESS OR HIGH MODE MIXITY. WITHOUT ASSUMING ANY PRE-EXISTING CRACK, PRESENT WORK PROPOSES AN APPROACH TO MODEL INITIATION OF INTERFACE DEBOND | |
dc.language.iso | en | |
dc.subject | Void growth, vapor pressure, popcorn failure, mixed mode loading, fracture toughness, Gurson cell | |
dc.type | Thesis | |
dc.contributor.department | MECHANICAL ENGINEERING | |
dc.contributor.supervisor | CHENG LI | |
dc.description.degree | Ph.D | |
dc.description.degreeconferred | DOCTOR OF PHILOSOPHY | |
Appears in Collections: | Ph.D Theses (Open) |
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ChongCW_PhD_Thesis.PDF | 8.53 MB | Adobe PDF | OPEN | None | View/Download |
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