CSIR-National Aerospace Laboratories, Bangalore, India
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InSIS Workshop Series – 2020 – Two Days Workshop on Structural Integrity of Ships and Submarines

Unified platform for Indian Structural Integrity

Venue : Seminar Hall Vanvihar IIT Bombay, Powai, Mumbai

24th & 25th January 2020

About the Workshop

Indian Navy is focussing on indigenous manufacturing of various categories of naval warships which include aircraft carrier, frigates, destroyers and submarines. Dedicated efforts by DRDO labs during the last decade have resulted in indigenous development of high strength steel for shipbuilding applications, as well as the associated weld consumables for various welding processes. Indigenously produced steel and weld consumables are used in the ongoing projects for construction of hull structures at various shipyards.

The 2-Day Workshop is intended to bring together the professional community working in disciplines related to Structural Integrity, with focus on specific problems involving ships and submarines. Senior officials responsible for the development of sea going vehicles of the Indian Navy will describe ongoing projects and challenges faced with regard to Structural Integrity. Experts in several disciplines related to Structural Integrity will present lectures addressing various aspects that together affect the residual strength and service life of safety critical marine structures.

Who should attend

researchers and engineers involved with the design, development, testing, operation and periodic inspection of safety critical structures, particularly, ships and submarines


Dr K Sridhar 

Naval Materials Research Laboratory (NMRL)
Defence Research & Development Organization(DRDO)
Addl. Ambernath, Thane
Tel: +91-251- 2623 107
Mobile : 9869343585,9833303252(WA)
Email : sridsudi@gmail.com

Prof. Nagamani Jaya Balila

Topics Covered

Naval Staff Requirements:

  1. Demands on reliability and seaworthiness of ship and submarine hulls and Technical Challenges for fatigue resistant underwater hull structures.

Material Behaviour under Naval Load Environment

  1. Influence of load profile &environments on fatigue, corrosion and fatigue corrosion phenomena
  2. Effect of residual stress on the fatigue life of welds in marine environment
  3. Influence of corrosion protection levels on corrosion fatigue

Characterization of Service Load Environment

  1. Onboard data acquisition systems and sensors to capture the load profile
  2. Analysis of service load/environment – time histories – Rainflow and Time-At-Level. Statistical representation of load environment
  3. Service load and environment simulation based on vehicle type, mission and operational conditions

Structural Integrity of Naval Structures

  1. Spectrum load fatigue testing (SLF) to characterize crack initiation and crack growth in marine environments
  2. Spectrum load fatigue testing (both HCF and LCF) at component and full-scale level for ships and submarine underwater structures
  3. Simulation and modeling to identify safety critical regions-highly stressed and fatigue prone areas in the ship
  4. Fatigue life estimation at critical locations with advanced modeling and simulation techniques using experimental inputs from SLF testing