Influence of the Resin on Interlaminar Mixed-Mode Fracture / WS. Johnson, PD. Mangalgiri
- Conference Author
- Toughened Composites (1985 : Houston, Texas)
- Physical Description
- 1 online resource (21 pages) : illustrations, figures, tables
- Additional Creators
- Johnson, WS., Mangalgiri, PD., American Society for Testing and Materials, and ASTM International
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License restrictions may limit access. - Summary
- Both literature review data and new data on toughness behavior of seven matrix and adhesive systems in four types of tests were studied to assess the influence of the resin on interlaminar fracture. Mixed-mode (that is, various combinations of opening Mode I [GI] and shearing Mode II [GII]) fracture toughness data showed that the mixed-mode relationship for failure appears to be linear in terms of GI and GII. The study further indicates that fracture of brittle resins is controlled by the GI component, and that fracture of many tough resins is controlled by total strain energy release rate GT. Regarding the relation of polymer structure and the mixed-mode fracture: high Mode I toughness requires resin dilatation; dilatation is low in unmodified epoxies at room temperature/dry conditions; dilatation is higher in plasticized epoxies, heated epoxies, and in modified epoxies; modification improves Mode II toughness only slightly compared with Mode I improvements. Analytical aspects of the cracked lap shear test specimen were explored. Geometric nonlinearity must be addressed in calculating the GI/GII ratio. The ratio varies with matrix modulus, which in turn varies with moisture and temperature.
- Dates of Publication and/or Sequential Designation
- Volume 1987, Issue 937 (January 1987)
- Subject(s)
- Other Subject(s)
- ISBN
- 9780803150027 (e-ISBN)
9780803109346
0803109342 - Digital File Characteristics
- text file PDF
- Bibliography Note
- Includes bibliographical references 26.
- Other Forms
- Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Also available in PDF edition. - Reproduction Note
- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1987. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
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- Mode of access: World Wide Web.
- Source of Acquisition
- ASTM International PDF Purchase price USD25.
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