Title of article
Evaluation of dynamic fracture toughness KId by Hopkinson pressure bar loaded instrumented Charpy impact test
Author/Authors
Fengchun، نويسنده , , Jiang and Ruitang، نويسنده , , Liu and Xiaoxin، نويسنده , , Zhang and Vecchio، نويسنده , , Kenneth S. and Rohatgi، نويسنده , , Aashish، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2004
Pages
9
From page
279
To page
287
Abstract
A novel method for measuring the dynamic fracture toughness, KId, using a Hopkinson pressure bar loaded instrumented Charpy impact test is presented in this paper. The stress intensity factor dynamic response curve (KI(t)−t) for a fatigue-precracked Charpy specimen is evaluated by means of an approximate formula. The onset time of crack initiation is experimentally detected using the strain gauge method. The value of KId is determined from the critical dynamic stress intensity factor at crack initiation. A KId value for a high-strength steel is obtained using this method at a stress-intensity-factor rate (K̇Id) greater than 106 MPa m/s.
Keywords
dynamic fracture toughness , Hopkinson pressure bar , Instrumented Charpy impact test
Journal title
ENGINEERING FRACTURE MECHANICS
Serial Year
2004
Journal title
ENGINEERING FRACTURE MECHANICS
Record number
2340633
Link To Document