Harold Reemsnyder's Involvement with Activities of the Ship Structure Committee

Materials Work Group, Committee on Marine Structures, National Research Council

1993 to 1997 Proposed projects for consideration by Ship Structure Committee

Ship Structure Committee Projects

Note PTC is the Project Technical Committee that manages the programs.
Program Name SR-1469 Improving Decisions About Ship Structural Fatigue Performance and Construction Quality (Current )
Objective Provide easy-to-use guidance, tools and training for use by ship surveyors, owners and government officials to make better, more-informed decisions about ship structural workmanship requirements, structural fatigue design performance and vessel service life.
HSR Involvement Member of Project Technical Committee
PTC Chair
Contractor BMT Designers & Planners
Program Name SR-1463 Challenges Faced by Arctic Ships (Completed )
Objective Identify questions concerning the challenges with regard to the structural safety and integrity of ships navigating in the Arctic Ocean.
HSR Involvement Member of Project Technical Committee
PTC Chair Dr. James Huang, USCG, (819) 994-8819
Contractor BMT-Fleet Technology, Ltd, Kanata, Ontario, Canada
Program Name SR-1460 Effect of Welded Properties on Aluminum Structures (Completed)
Objective Review up-to-date research on the reduction in structural strength due to welding and provide a basis for the design of aluminum structures that will minimize the penalty on scantling selection that the reduced strength in weld regions requires.
HSR Involvement Member of Project Technical Committee
PTC Chair Ms. Kim Tran, NSWCCD, (301)227-5075
Contractor BMT Designers & Planners
Program Name SR-1459 Criteria for Determining Fracture Repair Procedures (Completed)
Objective Develop a comprehensive and usable steel hull fracture repair guide to assist marine repair professionals in evaluating the correct repair procedure for steel ship hull fractures.
HSR Involvement Member of Project Technical Committee
PTC Chair Mr. Marc Cruder , USCG, (202)372-1200
Contractor American Bureau of Shipping
Program Name SR-1458 Mean Stress Assessment in Fatigue Analysis and Design (Current )
Objective Review available data, plan and carry out experiments, develop a methodology for the assessment of mean stress effects in fatigue analyses of marine structures.
HSR Involvement Member of Project Technical Committee
PTC Chair Mr David C. Stredulinsky, DRDSC, Canada, (902) 426-3100
Contractor Lloyd’s Register Martec
Program Name SR-1452 Feasibility, Conceptual Design and Optimization of a Large Composite Hybrid Hull (Completed )
Objective Study the feasibility of an advanced hybrid hull design for large ships. The main concept is to desgin a 3-D space frame of steel to resist the global loads and a compositie material to act as a watertight barrier to resist local pressure.
HSR Involvement Member of Project Technical Committee
PTC Chair Mr James Kent, Military Sealift Command, (202) 685-5752
Contractor BMT-Fleet Technology Ltd, Kanata, Ontario, Canada
Program Name SR-1449 Reliability Based Performance Assessment of Damaged Ships (Completed)
Objective Develop a reliability-based analysis procedure for determining survivability, recoverability and operability of damaged ships. Wave exitation loads will be predicted by a non-linear method and the results will be compared to those obtained from measurements. The ultimate hull girder strength will be evaluated. The reliability of damaged ships will be estimated and a reliability-based decision format will be developed for damaged ships.
HSR Involvement Member of Project Technical Committee
PTC Chair Mr Paul Hess, Office of Naval Research, (703) 696-9776
Contractor Universities of Newcastle and Glasgow & Strathclyde, United Kingdom
Program Name SR-1447 Fracture Mechanics Characterization of Aluminum Alloys for Marine Structural Applications (Completed)
Objective Characterize, through experimental fracture mechanics, the fatigue crack growth resistance and fracture toughness of four aluminum alloys used in marine structural applications. The fatigue crack growth tests will be performed in two environments: (1) room temperature at 40% relative humidity and (2) simulated ocean water. The fracture toughness tests will be performed in one environment - room temperature at 40% relative humidity.
HSR Involvement Recommended Project, Technical Advisor to Project Technical Committee
PTC Chair Mr Chao Lin, MARAD, (202) 366-1847
Contractor Fracture Technology Associates, Bethlehem, Pennsylvania
Program Name SR-1434 In-Service Performance of Aluminum Structural Details (Completed)
Objectives (1) Develop a survey of in-service performance of aluminum structural details for use by designers and fabricators of aluminum vessels. Start to fill some of the gaps identified in SSC-410, "Fatigue of Aluminum Weldments." Consideration shall be given to several types of vessels, such as catamarans, SES's, ACV's, SWATH's, monohulls, etc. (2) Construct a database of the in-service information and develop a rating system to assist designers and fabricators with the selection of fatigue resistant details and fabrication procedures. Coordinate the survey data with fabrication and QA procedures employed during the initial construction recommending minimum criteria that should be used to enhance the behavior of aluminum details subjected to the fatigue environment. (3) Introduce fatigue to the design stage of a vessel and address the fatigue issue up-front instead of the current practice which relegates this to a maintenance problem causing undue expense throughout the life of the vessel.
HSR Involvement Consultant to Contractor
PTC Chair Mr Paul Handler, MSC, (202) 685-5780
Contractor John J. McMullen Associates, Alexandria, Virginia
Program Name SR-1429 Fracture Toughness of an Entire Ship Structure (Completed)
Objective Demonstrate the feasibility of modeling the fracture toughness of the ship structure as an entity. Allow the owners and operators to understand the risk of fracture throughout their vessel and thus focus inspection, maintenance or design efforts to reduce this risk.
HSR Involvement Recommended Project, Participant with Contractor
PTC Chair Mr Chao Lin, MARAD, (202) 366-1847
Contractor BMT-Fleet Technology Ltd, Kanata, Ontario, Canada
Program Name SR-1395 Fatigue of Aluminum Structural Weldments (Completed)
Objective Develop a method for defining failure, which is needed for structural reliability assessment of marine structures and suitable for structural reliability assessment. Establish definitions of failures of surface ship structures at several levels that include fatigue of details, fracture, and collapse of stiffened and unstiffened panels, grillages, and hull girders. The analytical criteria (or failure definitions) will be compared with data developed from actual practice.
HSR Involvement Recommended Project, Technical Advisor to Project Technical Committee
PTC Chair Mr Roger Basu, ABS, (281) 877-6000
Contractor John J. McMullen Associates, Alexandria, Virginia
Program Name SR-1386 Fatigue Resistant Detail Design Guide for Ship Structures, and Short Course on Fatigue and Fracture Analysis of Ship Structures (Completed)
Objective Develop a guide for the design of fatigue-resistant structural details by practicing engineers. The guide should include a standardized fatigue design approach and a fatigue-life prediction method for the details. Design, organize, and conduct a continuing education course on the performance of ship structural integrity analyses by ship designers.
HSR Involvement Recommended Project, Technical Advisor to Project Technical Committee, Lecturer in Short Course (held three times to date)
PTC Chair Mr Nash Gifford, CDNSWC, (301) 227-1655
Contractor BMT-Fleet Technology Ltd, Kanata, Ontario, Canada
Program Name SR-1384 Crack-Arrest Toughness of Steel Weldments (Completed)
Objective Develop fracture mechanics test methods and analytical models for the crack-arrest assessment of marine weldments. Develop small-scale fracture-mechanics test methods to estimate the crack-arrest toughness of steel weldments. Develop a fracture-mechanics model for the assessment of crack arrest in marine structures.
HSR Involvement Recommended Project, Technical Advisor to Project Technical Committee
PTC Chair Mr Ernest Czyryca, NSWCCD, (301) 227-5073
Contractor BMT-Fleet Technology Ltd, Kanata, Ontario, Canada
Program Name SR-1374 Guide to Damage Tolerance Analysis of Marine Structures (Completed)
Objective Develop an engineering guide for the analysis of the damage tolerance of marine structures that is suitable for (1) initial design, (2) fitness-for-purpose analysis during in-service inspection, and (3) life-extension analyses.
HSR Involvement Recommended Project, Technical Advisor to Project Technical Committee
PTC Chair Mr Peter Noble, ABS, (713) 874-8172
Contractor BMT-Fleet Technology Ltd, Kanata, Ontario, Canada
Program Name SR-1363 Symposium and Workshop on the Prevention of Fracture in Ship Structures (Completed)
Objective In order to rationally address causes and remedies for the rash of structural failures occurring in ships, provide the means for bringing together experts in the fields of fatigue, fracture, and reliability of marine structures and the researches, designer, fabricators, and operators of these marine structures.
HSR Involvement Presented tutorial paper "Fatigue and Fracture of Ship Structures"
PTC Chair Mr Steve Allen, USCGRDC
Contractor Committee on Marine Structures, Marine Board, National Research Council
Program Name SR-1358 Optimized Design Parameters for Welded TMCP Steels (Completed)
Objective Develop static, fatigue, and fracture strength requirements for high-strength TMCP steels and weldments.
HSR Involvement Technical Advisor to Project Technical Committee
PTC Chair Mr William Hanzalek, ABS, (281) 877-640
Contractor BMT-Fleet Technology Ltd, Kanata, Ontario, Canada

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