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Application of Fracture Mechanics to Specify the Proof Load Factor for Clamp Band Systems of Launch Vehicles

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Abstract

This article presents a methodology for evaluation of the proof load factor (PLF) for clamp band system (CBS) made of M250 Maraging steel following fracture mechanics principles.CBS is most widely used as a structural element and as a separation system. Using Taguchi’s design of experiments and the response surface method (RSM) the compact tension specimens were tested to establish an empirical relation for the failure load (P max) in terms of the ultimate strength, width, thickness, and initial crack length. The test results of P max closely matched with the developed RSM empirical relation. Crack growth rates of the maraging steel in different environments were examined. Fracture strength (σf) of center surface cracks and through-crack tension specimens are evaluated utilizing the fracture toughness (K IC). Stress induced in merman band at flight loading conditions is evaluated to estimate the higher load factor and PLF. Statistical safety factor and reliability assessments were made for the specified flaw sizes useful in the development of fracture control plan for CBS of launch vehicles.

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References

  1. B. Nageswara Rao, D. Jayakumar, K.K. Biswas, S. Swaminathan, and E. Janardhana, Rigid Body Separation Dynamics for Space Launch Vehicles, Aeronaut. J. R. Aeronaut. Soc., 2006, 110, p 289–302

    Google Scholar 

  2. J. Singaravelu, D. Jeykumar, and B.N. Rao, Taguchi’s Approach for Reliability and Safety Assessments of Stage Separation Process of a Multistage Launch Vehicle, Reliab. Eng. Syst. Saf., 2009, 94, p 1526–1541

    Article  Google Scholar 

  3. J. Singaravelu, Reliability and Safety Assessment on Aerospace Structural Elements and Separation Systems, PhD Thesis, Department of Mechanical Engineering, University of Kerala, Trivandrum, India, 2011

  4. J. Singaravelu, S. Sundaresan, and B. Nageswara Rao, Reliability and Safety Assessment of Clamp Band System Used in Launch Vehicle and Evaluation of Proof Load Factor Utilizing Fracture Mechanics Principles, IEI, J. Aerosp. Eng., 2011, 92, p 15–18

    Google Scholar 

  5. ASTM-E399-06, Standard Test Method for Linear Elastic Plane Strain for Fracture Toughness K IC of Metallic Materials, Annual Book of ASTM Standards, Vol. 03.01, 2008

  6. G. Taguchi, Introduction to Quality Engineering, Asian Productivity Organization, Tokyo, 1990

    Google Scholar 

  7. P.J. Ross, Taguchi Techniques for Quality Engineering, McGraw-Hill, New York, 1995

    Google Scholar 

  8. S.H. Park, Robust Design and Analysis for Quality Engineering, Chapman & Hall, London, 1996

    Google Scholar 

  9. S.T. Rolfe and J.M. Barsoum, Fracture and Fatigue Control in Structures: Applications of Fracture Mechanics, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1977

    Google Scholar 

  10. ASTM-E1681-03, Standard Test Method For Determining Threshold Stress Intensity Factor for Environment-Assisted Cracking of Metallic Materials, Annual Book of ASTM Standards, Vol. 03.01, 2008.

  11. G.G. Chell, Elastic-Plastic Fracture Mechanics, Development in Fracture Mechanics-1, G.G. Chell, Ed., Applied Science Publishers, London, 1979

  12. R.M. Bonesteel, Fracture of Thin Sections Containing Surface Cracks, Eng. Fract. Mech., 1973, 5, p 541–554

    Article  CAS  Google Scholar 

  13. Fracture Criteria in the Design of Pressure Vessels Rocket Motor Casings, Joint study by Vikram Sarabhai Space Centre of Trivandrum, National Aeronautical Laboratory of Bangalore and the Indian Institute of Science of Bangalore, India Report No. VSSC-TR-15-224-81, 1981

  14. J.C. Newman, Jr., Fracture Analysis of Surface and Through Cracks in Cylindrical Pressure Vessels, NASA-TND-8325, 1976

  15. J.C. Newman Jr. and I.S. Raju, Analysis of Surface Cracks Under Tension or Bending Loads, NASA-TP-1578, 1979

  16. M. Peril and J.A. Levinsohn, Measurement of the Actual Fracture Toughness of a Maraging-300 Pressurised Cylinder Using Vessel as the Test Specimen, Eng. Fract. Mech., 1989, 34, p 525–530

    Article  Google Scholar 

  17. H. Taketani, Sustained Load Failures in Maraging Steel Weldments, Eng. Fract. Mech., 1972, 4, p 267–276

    Article  CAS  Google Scholar 

  18. W.D. James, Statistical Analysis of Experimental Data, Handbook on Experimental Mechanics, A.S. Kobayashi, Ed., Prentice-Hall, Upper Saddle River, NJ, 1987, p 970–972

    Google Scholar 

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Acknowledgments

The authors are grateful to the reviewers for their valuable comments to improve the clarity of presentation. They wish to thank Shri P. S. Veeraraghavan, Director, Vikram Sarabhai Space Centre, Trivandrum, India for giving permission to publish this article.

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Authors and Affiliations

  1. LVM3 Project, Vikram Sarabhai Space Centre, Trivandrum, 695022, India

    J. Singaravelu

  2. Structural Analysis and Testing Group, Vikram Sarabhai Space Centre, Trivandrum, 695022, India

    S. Sundaresan

  3. School of Mechanical and Civil Sciences, KL University, Green Fields, Vaddeswaram, 522 502, India

    B. Nageswara Rao

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  1. J. Singaravelu
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  2. S. Sundaresan
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  3. B. Nageswara Rao
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Correspondence to B. Nageswara Rao.

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Singaravelu, J., Sundaresan, S. & Nageswara Rao, B. Application of Fracture Mechanics to Specify the Proof Load Factor for Clamp Band Systems of Launch Vehicles. J. of Materi Eng and Perform 22, 926–935 (2013). https://doi.org/10.1007/s11665-012-0355-4

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  • DOI: https://doi.org/10.1007/s11665-012-0355-4

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