Strain Rate Characterization of Unidirectional Graphite/Epoxy Composite / IM. Daniel, WG. Hamilton, RH. LaBedz
- Conference Author
- Composite Materials: Testing and Design (6th Conference) (6th : 1981 : Phoenix, Arizona)
- Physical Description
- 1 online resource (21 pages) : illustrations, figures, tables
- Additional Creators
- Daniel, IM., Hamilton, WG., LaBedz, RH., American Society for Testing and Materials, and ASTM International
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Subscription required for access to full text. - Summary
- Unidirectional graphite/epoxy was characterized at various strain rates ranging from quasi-static to over 500 s¿̐ư1. Properties were obtained by testing thin rings 10.16 cm (4 in.) in diameter, 2.54 cm (1 in.) wide, and 6 to 8 plies thick under internal pressure. Unidirectional 0, 90, and 10-deg off-axis rings were tested to obtain longitudinal, transverse, and in-plane shear properties. In the dynamic tests internal pressure was applied explosively through a liquid, and the pressure was measured with a calibrated steel ring. Strains in the calibration and specimen rings were recorded with a digital processing oscilloscope. The data were processed and the equation of motion solved numerically by a minicomputer attached to the oscilloscope. Results were obtained and plotted in the form of a dynamic stress-strain curve. Times to failure were as short as 30 ?s. The 0-deg properties which are governed by the fibers do not vary much with strain rate with only a moderate increase in modulus. The 90-deg properties show a marked increase in modulus and strength with strain rate. In-plane shear properties follow a similar trend, although less pronounced than transverse properties. In all cases ultimate strains do not vary much with strain rate.
- Dates of Publication and/or Sequential Designation
- Volume 1982, Issue 787 (January 1982)
- Subject(s)
- Other Subject(s)
- ISBN
- 0803106955
9780803106956
9780803148499 (e-ISBN) - Digital File Characteristics
- text file PDF
- Bibliography Note
- Includes bibliographical references 11.
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- Also available in PDF edition.
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase. - Reproduction Note
- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1982. 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.
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- ASTM International PDF Purchase price USD25.
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