SYMPOSIA PAPER Published: 01 January 1979
STP34932S

Dynamic Photoelastic and Dynamic Finite Element Analyses of Polycarbonate Dynamic Tear Test Specimens

Source

Dynamic photoelasticity and dynamic finite element methods were used to study dynamic responses of dynamic tear test (DTT) specimens of a ductile material, that is, 3.2-mm (1 8-in.) thick polycarbonate sheets. Dynamic photoelastic patterns before and after the onset of unstable fracture showed that the dynamic fracture initiation toughness, KId, was attained during the second maximum load in the hammer load-time history and was approximately 65 percent of the fracture toughness, KIc. Also, dynamic stress intensity factors before and after crack propagation computed by dynamic finite element method using experimentally determined hammer load-time history were in reasonable agreement with those obtained from dynamic photoelasticity. The dynamic finite element analysis also showed that the dynamic fracture initiation toughness could be determined from the dynamic strain response of a strain gage located near the crack tip in conjunction with a simple static analysis.

Author Information

Mall, S
University of Maine, Orono, Me.
Kobayashi, AS
University of Washington, Seattle, Wash.
Urabe, Y
Mitsubishi Heavy Industries, Takasago, Japan
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E08
Pages: 498–510
DOI: 10.1520/STP34932S
ISBN-EB: 978-0-8031-4746-1
ISBN-13: 978-0-8031-0364-1