Abstract
Lithic tool manufacture was the earliest technological exploitation of the brittle fracture of hard materials, and archaeologists have traced and reproduced the evolution of flake tools through various stages of development from the early simple flake knives (Fig. 1) to the sophisticated multi-faceted edges of stone axes. The technology advanced during the period of gunflint manufacture. Of special interest are the simple geometrical relationships between the dimensions of flakes formed in certain controlled conditions1,2. The phenomenon of edge-flaking is also encountered in the attrition of tool cutting edges and in the chipping of precision edges of metrological components, where it is avoided rather than understood, by empirical radiusing (rounding-off). In our effort to improve the efficiency of cutting edges, we have observed that a law of constant geometry seems to apply to the flakes formed at rectangular edges, and the effect is relatively insensitive to the test material.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Speth, J. D. Am. Antiq. 37, 34–60 (1972).
Speth, J. D. Am. Antiq. 40, 203–207 (1975).
Almond, E. A. & Roebuck, B. Proc. int. Conf. Science of Hard Materials (eds Viswanadham, R. K. et al.) 597–614 (Plenum, New York, 1983).
Evans, A. G. & Wilshaw, T. R. Acta metall. 24, 939–956 (1976).
Fonseca, J. G., Eshelby, J. D. & Atkinson, C. Int. J. Fracture Mech. 7, 421–433 (1971).
Clark, G. & Piggot, S. Prehistoric Societies (Penguin, Harmondsworth, 1970).
Sachs, L. Applied Statistics (Springer, New York, 1982).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Almond, E., McCormick, N. Constant-geometry edge-flaking of brittle materials. Nature 321, 53–55 (1986). https://doi.org/10.1038/321053a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/321053a0
This article is cited by
-
Estimation Technique for the Edge Chipping Resistance of Brittle Materials
Strength of Materials (2023)
-
Numerical analysis of glass edge chipping by impact loading
International Journal of Fracture (2023)
-
Design of tool grinding processes for indexable inserts made of rocks
The International Journal of Advanced Manufacturing Technology (2023)
-
Sensitivity of Brittle Materials to Local Stress Concentrations on Their Fracture
Strength of Materials (2022)
-
Comparative Estimation of Fracture Resistance Test Methods: Zirconia Ceramics
Strength of Materials (2022)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.