A Numerical Dynamic Fracture Analyses of Three Wedge-Loaded DCB Specimens.

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Abstract:

A dynamic finite element code is used to compute the dynamic fracture toughness and crack arrest stress intensity factor from experimentally determined crack velocities in three fracturing wedge-loaded double cantilever beam DCB specimens. One experiment involving an Aradite-B DCB specimen by Kalthoff, et al., and two experiments involving Homalite-100 DCB specimens by Kobayashi, et al. and Irwin, et al. were analyzed by this hybrid numerical and experimental technique. Despite minor discrepancies, the computed dynamic fracture toughness and crack arrest stress intensity factors were in reasonable agreement with those determined experimentally. This comparative study between different experimental setups also indicates that the apparent differences in fracture dynamic responses could be attributed mainly to the differences in material properties, bluntness of the initial crack and specimen sizes and not to the differences in experimental techniques used. Author

Author(s):
Kobayashi, A. S. ; Mall, S. ; Urabe, Y. ; Emery, A. F.
Author Organization(s):
WASHINGTON UNIV SEATTLE DEPT OF MECHANICAL ENGINEERING
Descriptive Note:
Interim rept.,
Pagination:
0013

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-29
Contract/Grant Number(s):
N00014-76-C-0060
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_1.2.3_Educating; JCA_4.6_Engineering; JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_1.2.7_Experimentation; JCA_1.2.5_Lessons Learned; JCA_1.4.2_Health Service Delivery; JCA_1.4_Force Support
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*DYNAMIC RESPONSE, *FRACTURE(MECHANICS), *CANTILEVER BEAMS, VELOCITY, COMPUTATIONS, FINITE ELEMENT ANALYSIS, LOADS(FORCES), ANALYSIS OF VARIANCE, CRACK PROPAGATION, GEOMETRY, METAL PLATES, WEDGES, PHOTOELASTICITY, FACTOR ANALYSIS, STRESS CONCENTRATION
Field(s)/Group(s):
Structural Engineering and Building Technology, Mechanics
Keyword(s):
*Double cantilever beam specimens, Aradite B, Homalite 100, WUNR064478
Report Date:
1977 Oct 01