Abstract
A description is given of a modified instrumented Charpy test that is designed to enable impact-testing of cement-based composites. Problems encountered in instrumented impact testing of such composites and solutions to overcome them are discussed. Results of tests on concrete specimens at four different impact velocities are reported and are used to evaluate the performance of the test setup. A simple spring-mass model is used to verify the test results. This model is capable of providing suitable guidelines for the apriori selection of the basic test parameters with a view to minimize parasitic effects of inertial loading.
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Suaris, W. and Shah, S.P., “Mechanical Properties of Materials Subjected to Impact,” An Introductory Report, Proc. RILEM-CEBIABSE Symp. “Concrete Structures Under Impact and Impulsive Loading,” Bundesanstadt fur Materialprufung (BAM), Berlin, 33–62 (June 1982).
ACI Committee 544, “Measurement of Properties of Fiber Reinforced Concrete,” ACI J.,75 (7), 283–289 (July 1978).
Shah, S.P. andRangan, B.V., “Fiber Reinforced Concrete Properties,”ACI J.,68 (2),126–134 (Feb. 1971).
Shah, S.P. andNaaman, A.E., “Mechanical Properties of Glass and Steel Fiber Reinforced Mortar,”ACI J.,73 (5),50–53 (Jan. 1976).
Abe, H., Chandan, H.C. andBradt, R.C., “Low Blow Charpy Impact of Silicon Carbides,”Bul. Amer. Cer. Soc.,57 (6),587–595 (1978).
Cotterell, B., “Fracture Toughness and the Charpy V-Notch Test,”Brit. Welding J.,9 (2),83–90 (Feb. 1962).
Venzi, S., Priest, A.H. andMay, M.J., “Influence of Inertial Load in Instrumented Impact Tests,” Impact Testing of Metals, ASTM STP 466, 165–180 (1970).
Server, W.L., Wullaert, R.A. andSheckhard, J.W., “Evaluation of Current Procedures for Dynamic Fracture Toughness Testing,”Flaw Growth and Fracture, ASTM STP 631, 446–461 (1977).
Electric Power Research Institute, “Instrumented Precracked Charpy Testing,” Proc. CSNI Specialist Mtg., ed. R.A. Wullaert, CA (Nov. 1981).
Suaris, W. andShah, S.P., “Inertial Effects in the Instrumented Impact Testing of Cementitious Composites,”ASTM J. Cement, Concrete and Aggregates,3 (2),77–83 (1981).
Kalthoff, J.F., Winkler, S., Klemm, W. and Bienert, J., “On the Validity of K 1d -Measurements in Instrumented Impact Tests,” Proc. 5th Inter. Conf. Struct. Mech. Reactor Tech., Berlin, G4/6, 1–11 (1979).
Hibbert, A.P., “Impact Resistance of Fiber-Concrete,” PhD thesis, Univ. of Surrey (1977).
Winkler, S., Kalthoff, J.F. and Gerscha, A., “The Response of Pressure Vessel Steel Specimens on Drop Weight Loading,” Proc. 5th Int. Conf. Struct. Mech. Reactor Tech., Berlin, G4/6, 1–9 (1979).
Suaris, W. andShah, S.P., “Properties of Concrete Subjected to Impact,”J. Struct. Div., ASCE,109 (7),1727–1741 (July 1983).
Gopalaratnam, V.S. and Naaman, A.E., “Impact Resistance in Flexure of Steel Fiber Reinforced Concrete,” 3rd Progress Rep. U.S. Army Res. Office, DAAG 29-79-C-0162, Univ. of Illinois at Chicago (May 1982).
Gonczy, S.T., “The Effect of Various Densifying Agents Upon the High Temperature Impact Strength of Hot Pressed Silicon Nitride,” PhD thesis, Northwestern Univ. (Aug. 1978).
Mindess, S., Nadeau, J.S. andHay, J.M., “Effects of Different Curing Conditions on Slow Crack Growth in Cement Paste,”Cement and Concrete Res.,4 (6),953–965 (Nov. 1974).
Bluhm, J.E., “The Influence of Pendulum Flexibilities on Impact Energy Measurements,”ASTM STP 167, 84–92 (1955).
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Gopalaratnam, V.S., Shah, S.P. & John, R. A modified instrumented charpy test for cement-based composites. Experimental Mechanics 24, 102–111 (1984). https://doi.org/10.1007/BF02324991
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DOI: https://doi.org/10.1007/BF02324991