Experimental Determination of Dynamic Crack Initiation and Propagation Fracture Toughness in Thin Aluminum Sheets
Abstract
An experimental investigation was undertaken to characterize the dynamic fracture characteristics of 2024-T3 aluminum thin sheets ranging in thickness from 1.63–2.54 mm. Specifically, the critical dynamic stress intensity factor K^d_c was determined over a wide range of loading rates (expressed as the time rate of change of the stress intensity factor K^d_I) using both a servo-hydraulic loading frame and a split Hopkinson bar in tension. In addition, the dynamic crack propagation toughness, K_D, was measured as a function of crack tip speed using high sensitivity strain gages. A dramatic increase in both K^d_c and K_D was observed with increasing loading rate and crack tip speed, respectively. These relations were found to be independent of specimen thickness over the range of 1.5 to 2.5 mm.
Additional Information
© 1998 Kluwer Academic Publishers. Received 6 January 1997; accepted in revised form 8 January 1998. This work has been made possible through a grant from the Federal Aviation Administration (FAA) to Caltech (FAA Grant 95-G-048). The authors are very grateful to Mr. Joseph Gatto, the FAA Technical Monitor and Dr. Victor Chen and Mr. Jon Mowery of McDonnell Douglas for their consistent interest and technical discussions during the course of this research.Additional details
- Eprint ID
- 55286
- Resolver ID
- CaltechAUTHORS:20150226-154819567
- 95-G-048
- Federal Aviation Administration (FAA)
- Created
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2015-03-03Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- GALCIT