Abstract
Structural Joints are critical locations in aerospace structures. They are potential sources of failure due to the presence of stress concentrations due to the inherent discontinuities. Health monitoring systems for aerospace structures need to concentrate on locations with joints for both diagnostic purposes and prognostic estimations. This chapter primarily deals with prognostic part of SHM. The major issue in both bonded and fastener joints, is the non-linearity present in both of them in the deformation behaviour which complicates the prognostic estimations. Typical results are presented to focus on the non-linear behaviour of damage growth characteristics of relevance to the health monitoring.
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Acknowledgement
The author likes to pay special tribute to Dr. V.K. Aatre (currently Visiting Professor, IISc and formerly Scientific Advisor to Defence Minister, Govt. of India) who is responsible for the author’s entry into the field of Smart Structures and SHM. The author’s association with the National programs (NPSM and NPMASS) which Dr. Aatre initiated, helped the author to take forward his contributions on Structural Mechanics to Flight Safety and SHM systems. The author thanks many of his doctoral students who contributed to most of the work presented in this chapter. Thanks are due to Drs. P.D. Mangalgiri, V.A. Eshwar, S.P. Ghosh, K. Satishkumar, K. Badarinarayana and P.K. Sahoo, and also Dr. P.R. Arora who primarily contributed along with the author in the work on fatigue.
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Dattaguru, B. (2014). Structural Health Monitoring: Nonlinear Effects in the Prognostic Analysis of Crack Growth in Structural Joints. In: Vinoy, K., Ananthasuresh, G., Pratap, R., Krupanidhi, S. (eds) Micro and Smart Devices and Systems. Springer Tracts in Mechanical Engineering. Springer, New Delhi. https://doi.org/10.1007/978-81-322-1913-2_22
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DOI: https://doi.org/10.1007/978-81-322-1913-2_22
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