banner.jpg 203 Determination of Mode I Stress Intensity Factor for Orthotropic Laminates Using a Single Strain Gage Debaleena Chakrabortya, D. Chakrabortyb and K. S. R. K. Murthyc Department of Mechanical Engineering, Indian Institute of Technology Guwahati,
Guwahati-781039, India. adebaleena@iitg.ernet.in bchakra@iitg.ernet.in cksrkm@iitg.ernet.in ABSTRACT

In this paper, a single strain gage technique has been used for determination of mode I stress intensity factor (SIF) for orthotropic laminates. Considering mode I crack in an orthotropic laminate as plane stress problem, angular position and orientation of a strain gage has been determined such that mode I SIF could be determined pasting a single strain gage. A finite element based procedure has been adopted to simulate the determination of mode I SIF, KI using a single strain gage. Numerical examples show that the single strain gage technique can be used to determine accurate value of KI of orthotropic laminates.

Keywords: Composites, Orthotropic, Strain gage, Finite element analysis, Stress intensity factor.

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