Metal fusion bonding – Process – With measuring – testing – indicating – inspecting – or...
Reexamination Certificate
2004-05-20
2009-06-09
Ward, Jessica L (Department: 1793)
Metal fusion bonding
Process
With measuring, testing, indicating, inspecting, or...
C219S110000, C148S500000
Reexamination Certificate
active
07543732
ABSTRACT:
A technique for evaluation of the strength of a spot welded portion of a panel is provided. A stress value at the welded portion of the panel is calculated by a stress analysis according to a FEM using the elements, and then the strength of the welded portion is evaluated based on the stress value at the welded portion. A portion in the proximity of the spot welded portion is divided, with a central portion of the spot welded portion registered with a nodal point of the elements, into a central element and plural concentric ring-like elements from the center side provided by the central portion of the spot welded portion. Thereafter, the plural concentric ring-like elements are individually divided in a circumferential direction each into a plurality of portions to form the elements. Then, the strength is evaluated based on the stress value of the second ring-like element.
REFERENCES:
patent: 5883312 (1999-03-01), Hayashida
patent: 5930155 (1999-07-01), Tohi et al.
patent: 6398102 (2002-06-01), Cao et al.
patent: 6535211 (2003-03-01), Hariya et al.
patent: 6901809 (2005-06-01), Dong et al.
patent: 2002/0112548 (2002-08-01), Dong et al.
patent: 2003/0024323 (2003-02-01), Wang et al.
patent: 197 58 122 (1999-07-01), None
patent: 6-331506 (1994-12-01), None
patent: 8-153130 (1996-06-01), None
patent: 11-258073 (1999-09-01), None
patent: 11258073 (1999-09-01), None
patent: 2002-35986 (2002-02-01), None
patent: 2002035986 (2002-02-01), None
patent: 2003-149130 (2003-05-01), None
patent: 2003149130 (2003-05-01), None
Yuji et al. “Method of Fatigue Life estimation for Spot-Welding Structures”, Society of Automobile engineers, Inc. 2000.
Frederic Cugnon et al. “Error Assessment and Adaptivity.in Finite Element”,. European Workshop on Computational mechanics, Mar. 29-30, 2001.
“Method of Fatigue Life Estimation for Spot-Welded Structures”, Yuji Nakahara et al., Society of Automotive Enineers, Inc., 2000, pp. 1-13.
Niekamp, R. et al., “The Hierarchically Graded Multilevel Finite Element Method—A New Approach to Combine the h- and the p-method Using Multilevel Graded Ansatz-Spaces,” Computational Mechanics, Apr. 2001, pp. 302-304, vol. 27, No. 4, Springer, Germany.
Goldak J. et al., Computational weld mechanics, Department of Mechanical and Aeronautical Engineering, Carleton University, Ottawa, Canada, K1S 5B6, Engineering Mechanics Research Inc., Troy, Michigan, USA.
Ao Kazuo
Ishizu Hisayuki
Kobayashi Eiichi
Kondo Yusuke
Oda Nobutaka
Aboagye Michael
Birch & Stewart Kolasch & Birch, LLP
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
Ward Jessica L
LandOfFree
Evaluation method and evaluation apparatus for spot welded... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Evaluation method and evaluation apparatus for spot welded..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evaluation method and evaluation apparatus for spot welded... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4106749