Location

La Jolla, CA

Start Date

1-1-1991 12:00 AM

Description

Problems of dynamic fracture have been studied, both theoretically and experimentally, to obtain information about unstable crack extension and arrest. Investigation of bodies containing stationary cracks subjected to rapidly varying applied loads, show: (1) crack initiation; (2) dynamic crack growth; and (3) crack arrest are the dominant features. Experimental observations show that a stationary crack, subjected to a pulse loading, begins to propagate at sometime after the transient loading is applied [1–4]. It is also observed that this elapsed time varies with the magnitude of the pulse loading only [3,4]. Homma et al [5] examined the time history, of the crack-tip, of a semi-infinite Mode I crack under a finite duration pulse load. In this approach, Freund’s fundamental solution [6] was utilized and the crack initiation and arrest times were obtained in closed form. A more complete and detailed analysis of the same approach was given by Freund [7].

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

10B

Chapter

Chapter 7: Characterization of Materials

Section

Non-Linear Acoustic Properties

Pages

1883-1889

DOI

10.1007/978-1-4615-3742-7_97

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Crack Initiation and Arrest under Dynamic Loading

La Jolla, CA

Problems of dynamic fracture have been studied, both theoretically and experimentally, to obtain information about unstable crack extension and arrest. Investigation of bodies containing stationary cracks subjected to rapidly varying applied loads, show: (1) crack initiation; (2) dynamic crack growth; and (3) crack arrest are the dominant features. Experimental observations show that a stationary crack, subjected to a pulse loading, begins to propagate at sometime after the transient loading is applied [1–4]. It is also observed that this elapsed time varies with the magnitude of the pulse loading only [3,4]. Homma et al [5] examined the time history, of the crack-tip, of a semi-infinite Mode I crack under a finite duration pulse load. In this approach, Freund’s fundamental solution [6] was utilized and the crack initiation and arrest times were obtained in closed form. A more complete and detailed analysis of the same approach was given by Freund [7].