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原文传递 Design Optimization and Fatigue Analysis of Laser Stake Welded Connections.

题名：	Design Optimization and Fatigue Analysis of Laser Stake Welded Connections.
作者：	singh, a. vel, s. s. caccese, v.
关键词：	elastic properties, modular construction, steel, fracture(mechanics), welds, structural response, embedding, engineers, universities, trajectories, ship hulls, welded joints, hulls(structures), ship structural components, cracks, loads(forces), maine, str
摘要：	This report summanzes research on the design and fatigue analysis of laser-stake welded connections performed at the University of Maine from January 2006 to December 2007 for the Structural Response of Hybrid Ship Connections Subjected to Fatigue Loads (HSCF) project. Laser welding is a maturing technology that can be used to fabricate metal/composite hybrid connections wherein modular composite panels with embedded steel inserts are welded to a steel ship hull. The static and fatigue response of continuous laser welded steel connections for ship structures has been analyzed using finite element techniques. The stress analyses, which are based on the principles of linear elastic fracture mechanics, will enable engineers to design robust laser welded lap joints for prescribed loads. It is found that the overlap length. weld width and plate thicknesses play a major role in determining joint strength under different loading conditions. The fatigue response of laser welded lap joints is also investigated for different weld geometries and loading conditions using a fracture specific finite element program FRANC2D. It is found that the weld width has a significant effect on the crack trajectory and fatigue life of the joint. / NOTE: Project rept. 1 Jan 2006-31 Dec 2007. / Supplementary Notes: The original document contains color images. All DTIC reproductions will be in black and white. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0825；160p
报告类型：	科技报告