Modeling of dynamic crack propagation: II. Validation of two-dimensional analysis

✍ Scribed by C. H. Popelar; P. C. Gehlen

• Publisher: Springer Netherlands
• Year: 1979
• Tongue: English
• Weight: 887 KB
• Volume: 15
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00037831

✦ Synopsis

The problem of fast fracture and crack arrest in rectangular fracture specimens under plane strain conditions is investigated within the confines of linear elastic fracture mechanics. A development consistent with the energy-balance criterion for fracture is obtained by first expressing the strain and kinetic energies in their finite-difference forms. These forms are used in Lagrange's equations and in the definition of the energy release rate to obtain the governing field equations. This development is subsequently used to make predictions that are compared with their measured counterparts. Agreement of predicted and observed compliances of SEN, CT, and DCB specimens is found to be very good. A direct comparison of predicted and measured results is made for a rapid fracture and crack arrest in an Araldite B DCB specimen. The predicted crack growth, crack-time history, and variations of the dynamic stress intensity factor and crack speed with crack length during propagation agree remarkably well with the experimental data.

Nomenclature

A(V)

B C1

C2 CR

* Part I will be published in the next issue.