Abstract
The influence of dynamic effects on test procedures for measuring the crack arrest toughness and the impact fracture toughness is analyzed. It is shown that these dynamic effects can be significant: For cracks at arrest the stress condition is still dynamic and not static although the crack velocity has become zero. Dynamic effects become small only for small crack velocities or small crack jumps or for specially designed specimens. It is shown that the stress intensity factor history for cracks under impact loading cannot be adequately derived from instrumented impact data via static evaluation procedures. Only for large times to failure, resulting for small impact velocities and/or ductile material behavior do static approaches represent acceptable approximations. Reliable crack arrest and impact fracture toughness data can only be obtained by evaluation procedures which take the dynamic effects into account, e.g. by utilizing the reduced dynamic effects crack arrest test specimen or by applying the concept of impact response curves.
Résumé
On a analysé l'influence des effets dynamiques sur les procédures d'essais pour mesurer la ténacité à l'arrêt d'une fissure et la ténacité à la rupture par impact. On montre que ces effets dynamiques peuvent être significatifs: pour des fissures qui s'arrêtent, les conditions d'essais sont toujours dynamiques et non statiques, bien que la vitesse de la fissure soit devenue égale à 0. Les effets dynamiques deviennent petits seulement pour de faibles vitesses de la fissure ou pour de petits resauts de la fissure ou encore dans le cas d'éprouvettes spécialement conçues. On montre que l'histoire du facteur d'intensité de contrainte pour des fissures soumises à une charge d'impact ne peut être convenablement déduite de données d'impact instrumenté évaluée selon une procédure statique. Ce n'est que pour de longues périodes de temps avant rupture, qui résultent de faible vitesse d'impact et/ou d'un comportement ductile du matériau que les approches statiques conduisent à des approximations satisfaisantes. Les données fiables de ténacité à l'arrêt d'une rupture ou à la rupture par choc ne peuvent être obtenues que par des procédures d'évaluation qui prennent en compte les effets dynamiques, par exemple en utilisant une éprouvette d'essai d'arrêt de rupture à effets dynamiques réduits ou en appliquant le concept des courbes réponses à l'impact.
Similar content being viewed by others
References
P. Manogg, “Anwendung der Schattenoptik zur Untersuchung des Zerreissvorgangs von Platten”, Dissertation, Universität Freiburg, West Germany (1964).
P. Manogg, in Proceedings of the International Conference on the Physics of Non-Crystalline Solids, Delft, Netherlands (1964) 481–490.
P.S. Theocaris, Journal of Applied Mechanics 37 (1970) 409–415.
P.S. Theocaris and N. Ioakimidis, Journal of Applied Mechanics 22 (1971) 876–890.
A.J. Rosakis and L.B. Freund, Journal of Engineering Materials and Technology 104 (1982) 115–125.
J. Beinert and J.F. Kalthoff, in Mechanics of Fracture, Vol. 7, ed. G.C. Sih, Martinus Nijhoff Publishers, The Hague, Boston, London (1981) 281–330.
J.F. Kalthoff, in Proceedings of the International Conference on Experimental Mechanics, Society for Experimental Stress Analysis and Japan Society of Mechanical Engineers, Honolulu-Maui, Hawaii (1982) 1119–1126.
J.F. Kalthoff, in Workshop on Dynamic Fracture, ed. W.G. Knauss, California Institute of Technology, Pasadena, California (1983) 11–35.
J.F. Kalthoff, in Handbook on Experimental Mechanics, ed. A.S. Kobayashi, Prentice Hall, Englewood Cliffs, New Jersey, to appear in 1986.
J.F. Kalthoff, S. Winkler and J. Beinert, International Journal of Fracture 12 (1976) RCR 317–319.
J.F. Kalthoff, J. Beinert and S. Winkler, in ASTM STP 627-Fast Fracture and Crack Arrest, American Society for Testing and Materials, Philadelphia (1977) 161–176.
J.F. Kalthoff, J. Beinert, S. Winkler and W. Klemm, in ASTM STP 711- Crack Arrest Methodology and Applications, American Society for Testing and Materials, Philadelphia (1980) 109–127.
J.F. Kalthoff, Fortschritt-Berichte der VDI-Zeitschriften, Reihe 18, Nr. 4, VDI-Verlag, Düsseldorf (1978) 1–95.
J.F. Kalthoff, J. Beinert and S. Winkler, “Influence of Dynamic Effects on Crack Arrest”, Final Report prepared for Electric Power Research Institute, Palo Alto, California, under Contract No. RP 1022–1, IWM-Report W 4/80, Fraunhofer-Institut für Werkstoffmechanik, 78 Freiburg, West Germany (1980).
P.B. Crosley and E.J. Ripling, Nuclear Engineering and Design 17 (1971) 32–45.
P.B. Crosley and E.J. Ripling, in ASTM STP 627-Fast Fracture and Crack Arrest, American Society for Testing and Materials, Philadelphia (1977) 372–391.
J. Beinert, W. Klemm and J.F. Kalthoff, “Mechanik und Stoffverhalten bei der Arretierung von Rissen”, IWM-Report V 16/83, prepared for European Community on Steel and Coal, under Contract No. 7210 Ke 107, Fraunhofer-Institut für Werkstoffmechanik, 78 Freiburg, West Germany (1983).
G.T. Hahn, R.G. Hoagland, M.F. Kanninen and A.R. Rosenfield, in Proceedings of an International Conference on Dynamic Crack Propagation, ed. G.C. Sih, Lehigh University, Bethlehem (1972) 649–662.
G.T. Hahn, P.C. Gehlen, R.G. Hoagland, M.F. Kanninen, C. Popelar, A.R. Rosenfield et al., “Critical Experiments, Measurements and Analyses to Establish a Crack Arrest Methodology for Nuclear Pressure Vessel Steels”, Reports BMI-1937, 1959, 1995, Battelle Columbus Laboratories, Columbus, Ohio (1975), (1976), (1978).
J.F. Kalthoff, J. Beinert and S. Winkler, in Proceedings 8. Sitzung, Arbeitskreis Bruchvorgänge im Deutschen Verband für Materialprüfung, Köln, West Germany (1976) 138–144.
J. Beinert and J.F. Kalthoff, in Proceedings of International Conference on Application of Fracture Mechanics to Materials and Structures, eds. G.C. Sih, S. Sommer, W. Dahl, Freiburg, West Germany (1983) 493–507.
J.F. Kalthoff, S. Winkler and J. Beinert, International Journal of Fracture 13 (1979) RCR 528–531.
J.F. Kalthoff, W. Böhme, S. Winkler and W. Klemm, in Proceedings CSNI Specialist Meeting on Instrumented Precracked Charpy Testing, EPRI, Palo Alto, California (1980) II 1–16.
J.F. Kalthoff, W. Böhme and S. Winkler, in Proceedings VIIth International Conference on Experimental Stress Analysis, Society for Experimental Stress Analysis, Haifa, Israel (1982) 148–160.
W. Böhme and J.F. Kalthoff, International Journal of Fracture 20 (1982) R139–143.
J.F. Kalthoff, S. Winkler, W. Böhme and D.A. Shockey, in Proceedings of International Conference on Dynamical Mechanical Properties and Fracture Dynamics of Engineering Materials, Czechoslovak Academy of Sciences, Institute of Physical Metallurgy, Brno-Valtice, CSSR (1983) 1–16.
ASTM E 24.03.03, “Proposed Standard Method of Test for Instrumented Impact Testing of Precracked Charpy Specimens of Metallic Materials”, Draft 2d, American Society for Testing and Materials, Philadelphia (1981).
J.F. Kalthoff, S. Winkler, W. Böhme and W. Klemm, in Proceedings of 5th International Conference on Fracture, Cannes, 1981, Advances in Fracture Research, ed. D. Francois et al., Pergamon Press, Oxford, New York (1980) 363–373.
J.F. Kalthoff, “Concept of Impact Response Curves”, to appear in Metals Handbook, Vol. 8, Mechanical Testing, American Society for Metals, Metals Park (1985).
J.F. Kalthoff, S. Winkler and W. Böhme, “A Novel Procedure for Measuring the Impact Fracture Toughness K Id with Precracked Charpy Specimens”, to appear in Proceedings of International Conference on Mechanical and Physical Behavior of Materials under Dynamic Loading, Paris, France (1985).
W. Böhme, “Eine einfache Methode zur Bestimmung der dynamischen Risspitzenbeansprunchung bei schlagbelasteten Dreipunktbiegeproben”, IWM-Report Z 2/84, Fraunhofer-Institut für Werkstoffmechanik, 78 Freiburg, West Germany (1984).
W. Böhme and J.F. Kalthoff, “On the Quantification of Dynamic Effects in Impact Loading and the Practical Application for K Id-Determination”, to appear in Proceedings of International Conference on Mechanical and Physical Behavior of Materials under Dynamic Loading, Paris, France (1985).
D.R. Ireland, in Proceedings of International Conference on Dynamic Fracture Toughness, London (1976) 47–62.
R.J. Bucci, P.C. Paris, J.D. Landes and J.R. Rice, Fracture Toughness, Proceedings, 1971 National Symposium on Fracture Mechanics, Part II, STP 541, American Society for Testing and Materials, Philadelphia (1972) 40–69.
D.R. Ireland, in ASTM STP 563-Instrumented Impact Testing, American Society for Testing and Materials, Philadelphia (1974) 3–29.
J.F. Kalthoff and S. Winkler, “Vorrichtung zur Erfassung des Rissstartes bei einer Bruchmechanik-Probe”, Patentanmeldung P 33 34 570.8–52, Deutsches Patentamt München (1983).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kalthoff, J.F. On the measurement of dynamic fracture toughnesses — a review of recent work. Int J Fract 27, 277–298 (1985). https://doi.org/10.1007/BF00017973
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00017973