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21. 发明专利

JP2000146716A METHOD AND DEVICE FOR MEASURING RESIDUAL STRESS 失效
公开(公告)号：JP2000146716A
公开(公告)日：2000-05-26
申请号：JP31866498
申请日：1998-11-10
申请人： HITACHI LTD
发明人： YANAGIDA NOBUYOSHI , SUGANO SATOSHI , MIYAZAKI KATSUMASA , ENOMOTO KUNIO , ISHIWATARI MASAYUKI
IPC分类号： G01L1/00 , G01N3/40
摘要： PROBLEM TO BE SOLVED: To obtain the stress of the surface of a material from the indentation load-indentation depth response by a microhardness tester. SOLUTION: A push-in load is applied to the surface of a member for measuring residual stress by an indentation load mechanism 10 and an edge-shaped indenter 1, and the response of the indentation load-indentation depth at that time is measured. By comparing a measurement result with the response of the indentation load-indentation depth with known residual stress being stored in a database 35, the stress of the surface of the member is obtained. Also, by measuring the response of the indentation force-indentation depth of the surface of the member by changing the direction of the edge-shaped penetrator, the perpendicular stress component and the shear stress component for an arbitrary coordinate system being defined on the surface of the material can be obtained.

22. 发明专利

JP2009012030A Method for improving residual stress in inner surface of pipe, and pipe improved in residual stress in inner surface thereof 审中-公开
标题翻译：改善管内表面残留应力的方法及其在内表面残留应力中改进的管道
公开(公告)号：JP2009012030A
公开(公告)日：2009-01-22
申请号：JP2007175440
申请日：2007-07-03
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YANAGIDA NOBUYOSHI
IPC分类号： B23K31/00 , B23K101/06
摘要： PROBLEM TO BE SOLVED: To provide a method for improving residual stresses in an inner surface of a pipe, in which the residual tensile stresses in the axial direction of the inner surface of the pipe at a part to be improved, can be improved, and a pipe improved in residual stresses in inner surface thereof.
SOLUTION: Stress improvement heat input areas L5-L7 are set by deviating the position in the axial direction of a pipe 20 with respect to the part O to be improved where the residual tensile stress in the inner surface of the pipe 20 must be improved. The welding heat input higher than those in areas L1-L4 including the part O for improvement is given to an outer surface of the pipe at the set stress improvement heat input areas L5-L7.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于改善管道内表面中的残余应力的方法，其中管道内表面在待改善的部分的内表面的轴向上的残余拉伸应力可以是改善了管内部表面的残余应力。解决方案：应力改善热输入区域L5-L7是通过使管20的轴向方向相对于零件O的位置偏移来设定的，以便管20的内表面中的残余拉伸应力必须要改进在设定的应力改善热输入区域L5-L7处，向管道的外表面给出高于包括用于改善的部分O的区域L1-L4的焊接热输入。版权所有（C）2009，JPO＆INPIT

23. 发明专利

JP2000002599A METHOD AND APPARATUS FOR MEASUREMENT OF STRESS 失效
公开(公告)号：JP2000002599A
公开(公告)日：2000-01-07
申请号：JP16658698
申请日：1998-06-15
申请人： HITACHI LTD
发明人： YANAGIDA NOBUYOSHI , ENOMOTO KUNIO
IPC分类号： G01L1/00
摘要： PROBLEM TO BE SOLVED: To compute a vertical stress component and a shear stress component along a prescribed coordinate system on the basis of a main stress difference which is measured by a magnetostrictive stress measuring method. SOLUTION: A main stress direction and a main stress difference are measured by a magnetostrictive stress measuring apparatus 111. A vertical stress component is measured by a vertical stress measuring apparatus 112. On the basis of the measured value of a vertical stress and on the basis of the relative position of a magnetostricitve stress measuring position which uses a vertical stress measuring position as a starting point, the measured main stress difference is separated into a vertical stress component and a shear stress component along a prescribed coordinate system.

24. 发明专利

JPH11120383A CAD/CAE DEVICE 失效
公开(公告)号：JPH11120383A
公开(公告)日：1999-04-30
申请号：JP28883497
申请日：1997-10-21
申请人： HITACHI LTD , HITACHI INFORMATION TECHNOLOGY
发明人： HATA NAOKO , SAITO NAOTO , NEZU TOSHITADA , SAKAMOTO TATSUJI , TAKAHASHI KOICHI , YANAGIDA NOBUYOSHI , EZAWA YOSHITAKA
IPC分类号： G06F17/50 , G06T17/20
摘要： PROBLEM TO BE SOLVED: To efficiently use conventional information among information regarding a shape of a model. SOLUTION: When the information regarding the shape of an object to be analyzed and an analyzing condition is inputted in an analysis processor 10 from a keyboard 14, a finite element model is generated based on the information inputted in the analysis processor 10. After that, a request to change the shape for the finite element model is inputted from the keyboard 14 and when a point of change regarding the finite element model and its contents are specified, the shape of the finite element model is changed by processings at a shape changing part 20 and a shape processing part 22. Specifically, only the vicinity of a newly changed part in the model is initialized, other parts are left as they are and a processing to newly divide the initialized part into plural finite elements is performed. And a motion of the object to be analyzed is analyzed by an analysis processing part 26 based on the newly generated finite element model and an analyzing result is displayed on a screen of a display part 12 by the processing at an analyzing result display part 28.

25. 发明专利

JPH10146689A ESTIMATION SYSTEM FOR RESIDUAL WELDING STRESS AND RESIDUAL DEFORMATION 失效
公开(公告)号：JPH10146689A
公开(公告)日：1998-06-02
申请号：JP30900196
申请日：1996-11-20
申请人： HITACHI LTD
发明人： YANAGIDA NOBUYOSHI , SAITO NAOTO , SASAKI KOJI
IPC分类号： G01L1/00 , B23K31/00 , G01M99/00 , G01M19/00
摘要： PROBLEM TO BE SOLVED: To provide a system to efficiently estimate residual stress and residual deformation of a structure with weld zone. SOLUTION: The structure including weld zone is divided into a plurality of substructures and classified into groups by shape. Regarding all the substructures, pertaining groups are registered on the data file 113. The substructures of each of the groups are divided into finite elements and are recorded on data file 114 with residual stress and residual deformation calculated. The individual finite element having distribution of residual stress and residual deformation recorded on the data file 114 is formed every group, which is used to estimate the residual stress and residual deformation of the whole structure.

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