Predicting cohesive failure in thermosets
Modeling of stresses in epoxies used as adhesives, coatings, or encapsulants in electronic packaging can guide an engineer to more robust designs and material selections. However, stresses by themselves allow evaluation of qualitative trends only. Quantitative assessment of design margins requires s...
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| Veröffentlicht in: | Journal of applied polymer science 2011-02, Vol.119 (4), p.2143-2152 |
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| container_end_page | 2152 |
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| container_issue | 4 |
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| container_title | Journal of applied polymer science |
| container_volume | 119 |
| creator | Adolf, Douglas B. Chambers, Robert S. Elisberg, Brenton Stavig, Mark Ruff, Mary |
| description | Modeling of stresses in epoxies used as adhesives, coatings, or encapsulants in electronic packaging can guide an engineer to more robust designs and material selections. However, stresses by themselves allow evaluation of qualitative trends only. Quantitative assessment of design margins requires some knowledge of when stresses become excessive and failure is imminent. In this study, stresses were predicted accurately in a wide variety of tests, and the state of stress and strain was examined at the point of experimental failure to extract a single scalar metric that design engineers could use to correlate with the observed initiation of cracking. A value of the maximum principal strain of roughly 40% satisfactorily matched data encompassing different geometries, modes of deformation, and test temperature and is apparently linked to a physical mechanism of failure arising from “run‐away” nonlinear viscoelasticity. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 |
| doi_str_mv | 10.1002/app.32938 |
| format | Article |
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A value of the maximum principal strain of roughly 40% satisfactorily matched data encompassing different geometries, modes of deformation, and test temperature and is apparently linked to a physical mechanism of failure arising from “run‐away” nonlinear viscoelasticity. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><doi>10.1002/app.32938</doi><tpages>10</tpages></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Applied sciences Assessments Crack initiation Exact sciences and technology Failure Materials science Mathematical models Mechanical properties modeling Nonlinearity Physical properties Polymer industry, paints, wood Polymers Properties and testing Reproduction Strain Stresses Technology of polymers thermosets |
| title | Predicting cohesive failure in thermosets |
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