Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-28T05:15:37.290Z Has data issue: false hasContentIssue false
  • English
  • Français

Continuum Damage Mechanics Studies on the Dynamic Fracture of Concrete*

Published online by Cambridge University Press:  25 February 2011

E. P. Chen
E. P. Chen*
Affiliation:
Sandia National Laboratories, Applied Mechanics Division 1523, P.O. Box 5800, Albuquerque, New Mexico 87185
Get access

Abstract

The dynamic fracture of concrete in tension is studied by applying a continuum damage model developed by the author and his coworkers [1–3]. In this model, the degree of damage in concrete corresponds to the fraction of concrete volume that has been tension relieved, and tensile microcracking has been taken as the damage mechanism. In compression, the concrete is assumed to respond in an elastic/perfectly plastic manner. Strain-rate effects have been explicitly included in the model. Accumulation of damage in the material is reflected by the progressive weakening of the material stiffness. Examples involving center- and edge-cracked plate specimens subjected to the action of step and ramp loads are used to demonstrate the material responses predicted by the model. The bulk pressure versus strain relationships at locations close to the crack tip clearly show strainsoftening behavior. The damage tends to localize around the crack and its extent in the specimen is dependent upon both the crack geometry and the loading type. These results are presented and their implications are discussed.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 64: Symposium S – Cement-Based Composites: Strain Rate Effects on Fracture , 1985 , 63
Copyright
Copyright © Materials Research Society 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

*

This work performed at Sandia National Laboratories is supported by the U.S. Department of Energy under Contract Number DE-AC04-76D00789.

References

REFERENCES

1. Taylor, L. M. and Chen, E. P., Damage Accumulation in Rock Due to Explosive Loading, Proceedings of the 21st Annual Meeting of the Society of Engineering Science, Blacksburg, VA, 1984.Google Scholar
2. Taylor, L. M., Chen, E. P., and Kuszmaul, J. S., Microcrack Induced Damage Accumulation In Brittle Rock Under Dynamic Loading, To be published in the Journal of Computer Methods in Applied Mechanics and Engineering.Google Scholar
3. Chen, E. P. and Taylor, L. M., Fracture of Brittle Rock Under Dynamic Loading Conditions, Proceedings of the 4th International Symposium on the Fracture Mechanics of Ceramics, in print.Google Scholar
4. Hallquist, J. O., User's Manual for DYNA2D – An Explicit Two-Dimensional Hydrodynamic Finite Element Code With Interactive Rezoning, Lawrence Livermore National Laboratory Report UCRL-52997, Livermore, CA, 1981.Google Scholar
5. Budiansky, B. and O'Connell, R. J., Elastic Moduli of a Cracked Solid, International Journal of Solids and Structures, Vol.12, pp. 81–97, 1976.CrossRefGoogle Scholar
6. Grady, D. E. and Kipp, M. E., Continuum Modeling of Explosive Fracture in Oil Shale, International Journal of Rock Mechanics and Mining Sciences, Vol.17, pp.147–157, 1980.Google Scholar
7. Grady, D. E., The Mechanics of Fracture Under High-Rate Stress Loading, Preprints of the William Prager Symposium on Mechanics of Geomaterials: Rocks, Concrete and Soils, Edited by Bazant, Z. P., Northwestern University, Evanston, IL, 1983.Google Scholar
8. Kipp., M E., Grady., D. E., and Chen, E. P., Strain-Rate Dependent Fracture Initiation, International Journal of Fracture, Vol.16, pp. 471–478. 1980.Google Scholar
9. Sih, G. C., Handbook of Stress Intensity Factors, Lehigh University, Bethlehem, Pennsylvania, 1973.Google Scholar