Abstract
Development of a compact instrumented impacting apparatus for dynamic fracture studies designed on the lines of a swing pendulum machine is described. Salient features of the system and instrumentation calibration procedures are presented. The dynamic characteristics of the system are explained with the aid of a simple inertial model. Results of dynamic fracture experiments conducted on aluminum 6061 alloy and polymethylmethacrylate (PMMA) are discussed.
Issue Section:
Research Papers
References
1.
Ireland
, D. R.
, “Procedures and Problems Associated with Reliable Control of the Instrumented Impact Test
, Instrumented Impact Testing
, ASTM STP 563, American Society for Testing and Materials
, Philadelphia
, 1974
, pp. 3
-29
.2.
Radon
, J. C.
and Turner
, C. E.
, “Fracture Toughness Measurements by Instrumented Impact Test
,” Engineering Fracture Mechanics
0013-7944, Vol. 1
, 1969
, pp. 411
-428
.3.
Kobayashi
, T.
, Yamamoto
, I.
, and Niinomi
, M.
, “Introduction of a New Dynamic Fracture Evaluation System
,” Journal of Testing and Evaluation
0090-3973, Vol. 21
, No. 3
, 1993
, pp. 145
-153
.4.
Zehnder
, A. T.
, Rosakis
, A. J.
, and Krishnaswamy
, S.
, “Dynamic Measurement of the J Integral in Ductile Metals: Comparison of Experimental and Numerical Techniques
,” International Journal of Fracture
, Vol. 42
, 1990
, pp. 209
-230
.5.
Kalthoff
, J. F.
, “On the Measurement of Dynamic Fracture Toughness—A Review of Recent Work
,” International Journal of Fracture
, Vol. 27
, 1985
, pp. 277
-298
.6.
Wada
, H.
, “Determination of Dynamic Fracture Toughness for PMMA
,” Engineering Fracture Mechanics
0013-7944, Vol. 41
, No. 6
, 1992
, pp. 821
-831
.7.
Ravi-Chandar
, K.
and Knauss
, W. G.
, “Dynamic Crack-Tip Stresses under Stress Wave Loading—A Comparison of Theory and Experiment
,” International Journal of Fracture
, Vol. 20
, 1982
, pp. 209
-222
.8.
Kobayashi
, A. S.
, Mall
, S.
, and Lee
, M. H.
, “Fracture Dynamics of Wedge-Loaded Double Cantilever Beam Specimen
,” Cracks and Fracture
, ASTM STP 601, American Society for Testing and Materials
, Philadelphia
, 1976
, pp. 274
-290
.9.
Taudou
, C.
, Potti
, S. V.
, and Ravi-Chandar
, K.
, “On the Dominance of the Singular Dynamic Crack Tip Stress Field under High Rate Loading
,” International Journal of Fracture
, Vol. 56
, 1992
, pp. 41
-59
.10.
Yokoyama
, T.
and Kishida
, K.
, “A Novel Impact Three Point Bend Test Method for Determining Dynamic Fracture-Initiation Toughness
,” Experimental Mechanics
, Vol. 29
, No. 2
, 1989
, pp. 188
-194
.11.
Server
, W. L.
, “Impact Three Point Bend Testing for Notched and Precracked Specimens
,” Journal of Testing and Evaluation
0090-3973, Vol. 6
, No. 1
, 1978
, pp. 29
-34
.12.
Berger
, J. R.
, Dally
, J. W.
, and Sanford
, R. J.
, “Determining the Dynamic Stress Intensity Factor with Strain Gages Using a Crack Tip Locating Algorithm
,” Engineering Fracture Mechanics
0013-7944, Vol. 36
, No. 1
, 1990
, pp. 145
-156
.13.
Shukla
, A.
, Agarwal
, R. K.
, and Nigam
, H.
, “Dynamic Fracture Studies on 7075-T6 Aluminium and 4340 Steel Using Strain Gages and Photoelastic Coatings
,” Engineering Fracture Mechanics
0013-7944, Vol. 31
, No. 3
, 1988
, pp. 501
-515
.14.
Nigam
, H.
and Shukla
, A .
, “Comparison of the Techniques of Transmitted Caustics and Photoelasticity as Applied to Fracture
,” Experimental Mechanics
, Vol. 28
, No. 2
, 1988
. pp. 123
-131
.15.
Rosakis
, A. J.
, “Two Optical Techniques Sensitive to Gradients of Optical Path Difference: The Method of Caustics and the Coherent Gradient Sensor (C.G.S.)
,” Experimental Techniques in Fracture
, Vol. III
, Epstein
J.
, Ed., VCH Publishers
, New York
, 1992
.16.
Lazan
, B. J.
, “Damping of Materials and Members in Structural Mechanics
,” chap. 8, Pergamon Press
, New York
, 1968
.17.
Marur
, P. R.
, Simha
, K. R.Y.
, and Nair
, P. S.
, “Dynamic Analysis of Three Point Bend Specimens under Impact
,” (to appear in International Journal of Fracture).18.
Marur
, P. R.
, Simha
, K. R. Y.
, and Nair
, P. S.
, “Two Degrees of Freedom Modeling of Precracked Beams under Impact
,” (to appear in Engineering Fracture Mechanics).19.
Saxton
, H. J.
, Ireland
, D. R.
, and Server
, W. L.
, “Analysis and Control of Inertial Effects during Instrumented Impact Testing
,” Instrumental Impact Testing
, ASTM STP 563, American Society for Testing and Materials
, Philadelphia
, 1974
, pp. 50
-73
.20.
Kobayashi
, T.
, “Measurement of Dynamic Fracture Toughness JId by Instrumented Charpy Test
,” International Journal of Fracture
, Vol. 23
, 1983
, pp. R105
-R109
.21.
Yin
, X. C.
and Chen
, T. G.
, “New Formulae for Determining Fracture Toughness of a Wide Range of Different Materials with Chevron-Notched Short-Rod and Short-Bar Specimens
,” Journal of Testing and Evaluation
0090-3973, Vol. 20
, No. 4
, 1992
, pp. 239
-247
.22.
Kinra
, V. K.
and Kolsky
, H.
, “The Interaction between Bending Fractures and the Emitted Stress Waves
,” Engineering Fracture Mechanics
0013-7944, Vol. 9
, 1977
, pp. 423
-432
.
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