Influence of loading conditions on the measurement of mode I critical stress intensity factor for wood and medium-density fiberboard by the single-edge-notched tension test

Holzforschung ◽  
2010 ◽  
Vol 64 (6) ◽  
Author(s):  
Hiroshi Yoshihara
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Test Data ◽  
Critical Stress ◽  
Medium Density Fiberboard ◽  
Critical Stress Intensity Factor ◽  
Mode I ◽  
Medium Density ◽  
Single Edge

Abstract The mode I critical stress intensity factor K Ic for wood and medium-density fiberboard (MDF) was obtained by conducting the single-edge-notched tension (SENT) test, designed for isotropic materials, under various loading conditions, and performing subsequent numerical analysis on the test data. The validity of the SENT test for this purpose was examined by conducting double cantilever beam (DCB) tests and comparing test data with those of the SENT tests. The best values of K Ic are obtained by conducting the SENT test under pin loading and introducing an additional crack length into the equations used for analyzing the test data.

Mode I critical stress intensity factor of wood and medium-density fiberboard measured by compact tension test

Holzforschung ◽  
2011 ◽  
Vol 65 (5) ◽  
Author(s):  
Hiroshi Yoshihara ◽  
Ami Usuki
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Critical Stress ◽  
Medium Density Fiberboard ◽  
Compact Tension ◽  
Critical Stress Intensity Factor ◽  
Mode I ◽  
Medium Density ◽  
Single Edge

Abstract The critical stress intensity factor of mode I (K Ic) obtained by compact tension (CT) tests of wood and medium-density fiberboard (MDF) was experimentally and numerically analyzed. A double cantilever beam (DCB) test was also conducted and the results were compared with those of the CT tests. Similar to the results of single-edge-notched bending (SENB) and single-edge-notched tension (SENT) tests previously conducted, the value of K Ic was obtained properly from the CT test when an additional crack length was taken into account.

Examination of the mode I critical stress intensity factor of wood obtained by single-edge-notched bending test

Holzforschung ◽  
2010 ◽  
Vol 64 (4) ◽  
Author(s):  
Hiroshi Yoshihara
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Crack Length ◽  
Critical Stress ◽  
Initial Crack ◽  
Critical Stress Intensity Factor ◽  
Bending Test ◽  
Mode I ◽  
Single Edge

Abstract The critical stress intensity factor of mode I (K Ic) obtained by single-edge-notched bending (SENB) tests of wood was experimentally and numerically analyzed. A double cantilever beam (DCB) test was also conducted and the results were compared with those of SENB tests. The K Ic value was obtained by introducing an additional crack length into the equations used for analyzing the SENB test of isotropic material when the initial crack length ranged from 0.1 to 0.6 times the depth of the specimen.

On the Behavior of Notched Struts

1968 ◽  
Vol 90 (4) ◽  
pp. 441-444 ◽  
Author(s):  
B. Cotterell
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Critical Stress ◽  
Critical Stress Intensity Factor ◽  
Fracture Load ◽  
Buckling Load ◽  
Theoretical Treatment ◽  
Single Edge ◽  
Edge Notch

A theoretical buckling load for a strut with a single-edge notch at its mid point is calculated assuming that the effect of the notch is to produce a discontinuity in the slope of the strut. This buckling load is not likely to be reached if the material of the strut is at all brittle and it is shown that the fracture load can be calculated from the critical stress intensity factor of the material. Some justification to the theoretical treatment is obtained from the analysis of previous experimental results.

Sign in / Sign up

Export Citation Format

Share Document