Linear Analysis of Crack Propagation in a Solid Rocket Propellant


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The Solid Rocket Propellant in its crude form is a rubber like material. This rubber like material performs very interestingly when used to study crack propagation. Blunting of crack tips occurred in the composite when the load is applied, which is generally non-linear phenomenon. The crack propagation analysis for such case is generally taken for double edge cracks but the presence of central cracks in the composites cannot be ignored. This trend is nonlinear and complex. In order to simplify things, optical grade polyurethane material is used instead. The polyurethane material we used for our experimental work was PSM-4. In this research work, an extensive study is made regarding crack propagation analysis using the basic principles of fracture mechanics and its different techniques for finding out the parameter necessary for tracing crack propagation. Mode 1 (Opening Mode) is considered for the central crack propagation analysis. The objectives set in this context are the determination of Stress Intensity Factor of central crack in the specimen using photoelastic experimental data and simulation of central crack in softwares (ANSYS, Pro-e). For this purpose a rectangular plate with Central Crack was used to be experimented upon using the techniques of Photoelasticity. A comparative analysis technique is adopted to compare the effectiveness of results from experiments as well as software simulations.



Edited by:

Mohamed Othman




M. Gulzar, "Linear Analysis of Crack Propagation in a Solid Rocket Propellant", Applied Mechanics and Materials, Vols. 229-231, pp. 742-746, 2012

Online since:

November 2012





[1] C.H. Wang: Introduction to Fracture Mechanics, DSTO Aeronautical and Maritime Research Laboratory Publication Melbourne Victoria 3001, July (1996).

[2] Arthur P Boresi, Richard JSchmidt, Omar M Sidebottom: Advanced Mechanics of Materials, Fifth edition John Wiley Sons 1993 pp.608-621.

[3] David Roylance: Introduction to Fracture Mechanics, Department of Materials Science and Engineering Massachusetts InstituteofTechnology, Cambridge, MA02139 June14, (2001).

[4] James F. Doyle and James W. Phillips: Manual on experimental Stress Analysis, Fifth Edition, Society for Experimental Mechanics.

[5] Kevin T. Gloss A Photoelastic Investigation into the Effects of Cracks and Boundary Conditions on Stress Intensity Factors in Bonded Specimens, May, 2000 Blacksburg, Virginia.

[6] Dr. A. -V. Phan: ANSYS TUTORIAL – 2-D Fracture Analysis ANSYS Release 7. 0, University of South Alabama.

[7] www. imechanica. com.

[8] www. ptc. com.