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1. 发明申请

US20180032654A1 BREAK PREDICTION METHOD, BREAK PREDICTION DEVICE, PROGRAM, RECORDING MEDIUM, AND BREAK DISCERNMENT STANDARD CALCULATION METHOD 审中-公开
公开(公告)号：US20180032654A1
公开(公告)日：2018-02-01
申请号：US15552666
申请日：2016-02-17
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Takahiro AITOH , Yoshiyuki KASEDA , Yusuke TSUNEMI
IPC分类号： G06F17/50
CPC分类号： G06F17/5018 , G01N3/00 , G01N3/08 , G06F2217/16
摘要： A break prediction method according to the present invention predicts a break of a joint portion of an object to be analyzed including a pair of members joined to each other by using a finite element method, and includes a first step of acquiring at least an element size of a base material portion, from among parameters set in an element model for the object to be analyzed; a second step of calculating, as a break discernment standard, a break limit moment defined by a function including the element size of the base material portion as a variable; and a third step of discerning whether the moment applied to the joint portion in a deformation analysis of the element model for the object to be analyzed exceeds the break limit moment, and outputting the result of the discernment as a break prediction result for the joint portion.

2. 发明申请

US20150310143A1 DEFORMATION ANALYSIS DEVICE, DEFORMATION ANALYSIS METHOD, AND PROGRAM 审中-公开
标题翻译：变形分析装置，变形分析方法和程序
公开(公告)号：US20150310143A1
公开(公告)日：2015-10-29
申请号：US14648951
申请日：2013-12-13
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Satoshi HIROSE , Toshiyuki NIWA , Yusuke TSUNEMI
IPC分类号： G06F17/50 , G06F17/10
CPC分类号： G06F17/5009 , G01N2203/006 , G01N2203/0067 , G01N2203/0218 , G01N2203/0246 , G06F17/10 , G06F17/5018 , G06F2217/16
摘要： The deformation analysis device includes: a storage unit (12) which stores analysis data of a material; a state variable calculating unit (152) which calculates stresses and other state variables of respective elements of the material at each point in time of deformation of the material, based on the analysis data; a fracture determining unit (153) which, based on the calculated state variables, determines whether or not a fracture has occurred in each of the elements of the material, based on a fracture limit stress curve which is found in advance for the material; and a stress correcting unit (154) which, regarding an element in which it is determined that the fracture has occurred, out of the elements of the material, reduces σ by the following expression σ=(1−D)σ′ where σ is a stress with a rigidity decrease taken into consideration, D is a damage variable (note that 0≦D≦1) in continuum damage mechanics, and σ′ is a stress with the rigidity decrease not taken into consideration, to thereby decrease rigidity of the relevant element, without eliminating the element, and updates the analysis data.
摘要翻译：变形分析装置包括：存储单元（12），其存储材料的分析数据; 状态变量计算部（152），其基于所述分析数据来计算所述材料变形的每个时刻的所述材料的各元素的应力等状态变量; 基于计算出的状态变量的断裂判定单元（153），基于材料的预先求出的断裂极限应力曲线来判定材料的每个元素中是否发生了断裂，以及应力校正单元（154），其在确定了所述断裂已经发生的元件之外，在所述材料的元件中减少; 通过以下表达式＆sgr; =（1-D）＆sgr;'where＆sgr; 是考虑到刚度下降的应力，D是连续损伤力学中的损伤变量（注意0＆nlE; D＆nlE; 1），而且是没有考虑到刚性下降的应力，从而降低刚度的相关元素，而不需要删除元素，并更新分析数据。

3. 发明申请

US20170270226A1 STRUCTURE DESIGN SUPPORT DEVICE, STRUCTURE DESIGN SUPPORT METHOD, PROGRAM, AND RECORDING MEDIUM 审中-公开
公开(公告)号：US20170270226A1
公开(公告)日：2017-09-21
申请号：US15500241
申请日：2015-08-21
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Yusuke TSUNEMI , Takeshi KAWACHI , Atsushi YAMAZAKI
IPC分类号： G06F17/50
摘要： A structure design support device includes: an evaluation point information acquisition unit which acquires evaluation point information representing a position in a first state and a position in a second state, of an evaluation point provided in a structure which is configured of a plurality of parts, and a part to which the evaluation point belongs, among the plurality of parts; and an evaluation value calculation unit which calculates an evaluation value representing the magnitude of a change between the first state and the second state, of a positional relationship between a first evaluation point belonging to a first part and a second evaluation point belonging to a second part different from the first part to which the first evaluation point belongs, by using the evaluation point information acquired in the evaluation point information acquisition unit.

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