Stochastic critical stress intensity factor response of single edge notched laminated composite plate using displacement correlation method

2018 ◽  
Vol 27 (14) ◽  
pp. 1223-1237 ◽  
Author(s):  
Achchhe Lal ◽  
Sameer B. Mulani ◽  
Rakesh K. Kapania
Holzforschung ◽  
2011 ◽  
Vol 65 (5) ◽  
Author(s):  
Hiroshi Yoshihara ◽  
Ami Usuki

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.


Holzforschung ◽  
2010 ◽  
Vol 64 (4) ◽  
Author(s):  
Hiroshi Yoshihara

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.


2019 ◽  
Vol 15 (6) ◽  
pp. 1053-1074
Author(s):  
Achchhe Lal ◽  
Khushbu Jain

Purpose The purpose of this paper is to evaluate hygro-thermo-mechanically induced normalized stress intensity factor (NSIF) of an edge crack symmetric angle-ply piezo laminated composite plate (PLCP) using displacement correlation method. Design/methodology/approach In the present work, the governing equations are solved through conventional finite element method combined with higher order shear deformation plate theory utilizing the micromechanical approach. Findings The effects of crack length, the thickness of the plate and piezoelectric layer, stacking sequences, fiber volume fraction, position of piezoelectric layer, change in moisture and temperature, and voltage on the NSIF are examined. The numerical results are presented in the form of a table for the better understanding and accuracy. The present outlined approach is validated with results available in the literature. These results can become a benchmark for future studies. Research limitations/implications The mathematical models theoretically have been developed by considering different parameters. The results are generated using MATLAB 2015 software developed by the authors’ side. Originality/value The fracture analysis of a single edge crack PLCP with the effect of a piezoelectric layer at the different location of cracked structures, plate thickness, and actuator voltage and hygro-thermo loading is the novelty of research for health monitoring and high-performance analysis.


1968 ◽  
Vol 90 (4) ◽  
pp. 441-444 ◽  
Author(s):  
B. Cotterell

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.


Holzforschung ◽  
2010 ◽  
Vol 64 (6) ◽  
Author(s):  
Hiroshi Yoshihara

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.


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