A comparison of fillet weld strength and U.S. Navy design specifications for non-combatant ships and the economic implications
McCabe, William Carl
MetadataShow full item record
There is a great interest in the strength of fillet welds because the welding operation accounts for about 30% of the labor cost in planning and constructing ship hulls. One way to reduce welding cost is to reduce the required weld size. Background information is obtained by reviewing the major experimental and theoretical work in the areas of static strength, fatigue strength , and shear strength of fillet welds. In order to appreciate the conditions in the real world, design considerations, fabrication considerations, and corrosion considerations are discussed. Typical joints from existing U.S. Navy ships are employed to obtain detailed geometry and local loading information to be used as input for a computer model which was developed at Massachusetts Institute of Technology which uses the finite element method for determining the static strength for fillet welds. In one particular joint a reduction of 30% in the required weld size is justified. A future system for analyzing fillet weld strength is proposed and explained by the use of an example, The economics of intermittent and continuous welds are examined, and the economic impact that a reduction in the required fillet weld size would have on ship construction cost is estimated.
This thesis document was issued under the authority of another institution, not NPS. At the time it was written, a copy was added to the NPS Library Collection for reasons not now known. It has been included in the digital archive for its historical value to NPS. Not believed to be a CIVINS (Civilian Institutions) title.Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Hagaman, Bruce M. (Monterey, California. Naval Postgraduate School, 1988-09);A prototype expert system is designed to forecast the tropical cyclone related winds that may be used to set Conditions of Readiness (COR) at Cubi Point, Philippines. One set of rules modifies the storm position and strength ...
Hagaman, Bruce M. (Monterey, California. Naval Postgraduate School, 1988);A prototype expert system is designed to forecast the tropical cyclone related winds that may be used to set Conditions of Readiness (COR) at Cubi Point, Philippines. One set of rules modifies the storm position and strength ...
Reducing the surface performance requirements of a primary mirror by adding a deformable mirror in its optical path Villalba, Ernesto R. (Monterey, California: Naval Postgraduate School, 2015-12);In recent years, carbon fiber reinforced polymer (CFRP) mirrors been proposed for use in future imaging satellites. Compared to traditional glass-based mirrors, CFRP mirrors offer reduced manufacturing times, lower ...