公开(公告)号：US07415889B2

公开(公告)日：2008-08-26

申请号：US11627918

申请日：2007-01-26

申请人： E. Ray Harrell, Jr.

发明人： E. Ray Harrell, Jr.

IPC分类号： G01D1/00

CPC分类号： G01N3/32 ,  G01N33/442 ,  G01N2203/0071 ,  G01N2203/0089 ,  G01N2203/0094 ,  G01N2203/0214 ,  G01N2203/0246

摘要： A method is disclosed of using external polymeric analytical techniques to predict in-vivo polymeric performance, more particularly, viscoelastic property characterization for performance modeling of biomedical devices that incorporate a polymeric component and are load-bearing during service. Time-Temperature Superposition can be used to accelerate external testing of pertinent properties. Boltzmann's superposition provides a mathematical methodology for determining the time-dependent strain that develops in response to an imposed stress history. The modeling of the present invention provides an opportunity to describe and predict behavior of the device during in-vivo service, as well as it providing a basis for evaluating alternate “candidate” polymers for use in the construction of the device.

摘要翻译： 公开了一种使用外部聚合物分析技术来预测体内聚合物性能的方法，更具体地说，用于结合聚合物组分并在使用期间承载的生物医学装置的性能建模的粘弹性性质表征。 时间 - 温度叠加可用于加速相关性能的外部测试。 玻尔兹曼叠加提供了一种数学方法，用于确定响应强加的压力历史而发展的时间依赖性应变。 本发明的建模提供了在体内服务期间描述和预测装置的行为的机会，并且为提供用于评估用于构造装置的替代“候选”聚合物提供基础。

公开(公告)号：US06983226B2

公开(公告)日：2006-01-03

申请号：US09919922

申请日：2001-08-02

申请人： Christine M. Kennefick

发明人： Christine M. Kennefick

IPC分类号： G06F17/50 ,  G06F17/10 ,  G06G7/48

CPC分类号： G06F17/5009 ,  G01N2203/0066 ,  G01N2203/0214 ,  G06F2217/16

摘要： A composite material having a microstructure model is provided with a continuous matrix of microstructure entities such as particles and grains that rotate under both remotely applied stresses and induced concentrated stresses from nearby cracks, pores and smaller particles, all networked within the matrix. The rotation microstructure entities are smooth closed contours that are elliptically-shaped. A net moment results on the boundaries of the microstructure entities effecting fracture toughening of the material. Small particles and other microstructural entities may reduce the attenuation of, transmit, and counteract the stresses induced by the rotating microstructure entities. The induced stresses counteract those stresses and strain energy densities that promote crack propagation. The result is a microstructure free of laminates, coatings, fibers and fiber architectures that effect toughening of the material against fracture.

公开(公告)号：US06799463B2

公开(公告)日：2004-10-05

申请号：US10001112

申请日：2001-11-02

申请人： Scott S. Fields ,  Eric S. Meyer ,  Jeffrey S. Sermersheim

发明人： Scott S. Fields ,  Eric S. Meyer ,  Jeffrey S. Sermersheim

IPC分类号： G06F1900

CPC分类号： G06F17/5095 ,  G01N2203/0214 ,  G06F17/5018 ,  G06F2217/04 ,  G06F2217/76

摘要： A method, system and computer program product are provided for automated fatigue and structural analysis of a structural element. The method, system and computer program product consolidate and manage the fatigue and structural analysis tools and are responsive to user requests for fatigue and structural analysis of elements based upon user-provided information regarding the element. As such, the appropriate fatigue and structural analysis tools are automatically selected and run, and the output of the tools is automatically evaluated to provide immediately useful fatigue and structural analysis results to the user without requiring further manual input. Thus, people without specialized training can quickly obtain fatigue and structural analysis results for an element. In addition, because the fatigue and structural analysis tools are integrated, the tools may be accessed from remote locations via a computer network.

摘要翻译： 提供了一种用于结构元件的自动疲劳和结构分析的方法，系统和计算机程序产品。 方法，系统和计算机程序产品整合和管理疲劳和结构分析工具，并根据用户提供的有关元素的信息，响应用户的疲劳和结构分析要求。 因此，自动选择和运行适当的疲劳和结构分析工具，并自动评估工具的输出，以便在不需要进一步手动输入的情况下向用户提供有用的疲劳和结构分析结果。 因此，没有专业训练的人可以快速获得疲劳和结构分析结果。 另外，由于疲劳和结构分析工具是集成的，所以可以通过计算机网络从远程位置访问这些工具。

公开(公告)号：US06751581B1

公开(公告)日：2004-06-15

申请号：US09569205

申请日：2000-05-11

申请人： Daniel Joseph Ondrus ,  Keith David Thompson

发明人： Daniel Joseph Ondrus ,  Keith David Thompson

IPC分类号： G06G748

CPC分类号： G06F17/5018 ,  G01N2203/0214

摘要： A method for simulating the formation of an adhesive joint and/or for determining the attributes of the adhesive joint is disclosed. The method allows an individual or business enterprise to consistently and reliably determine a proper amount and placement of adhesive used to form the joint.

摘要翻译： 公开了一种用于模拟粘合接头的形成和/或用于确定粘合接头的属性的方法。 该方法允许个人或商业企业一致和可靠地确定用于形成接头的粘合剂的适当量和位置。

公开(公告)号：US06704664B2

公开(公告)日：2004-03-09

申请号：US10025530

申请日：2001-12-18

申请人： Hong Su ,  Shang-Rou Hsieh

发明人： Hong Su ,  Shang-Rou Hsieh

IPC分类号： G01B344

CPC分类号： G06F17/5018 ,  G01N2203/0073 ,  G01N2203/0214 ,  G06F2217/76

摘要： A method for determining the sensitivity of the fatigue life of a structural component with respect to specific design parameters includes obtaining the stress profile for a structural component under random process establishing a relationship between the stress profile and the fatigue life of the structural component, developing the sensitivity of the fatigue life with respect to design parameters, optimizing the design of the structural component based upon the design parameters to which the fatigue life is most sensitive.

摘要翻译： 用于确定结构部件相对于具体设计参数的疲劳寿命的灵敏度的方法包括在随机过程下获得结构部件的应力分布，建立应力分布与结构部件的疲劳寿命之间的关系， 疲劳寿命对设计参数的敏感性，根据疲劳寿命最为敏感的设计参数优化结构件的设计。

公开(公告)号：US20030158676A1

公开(公告)日：2003-08-21

申请号：US10387170

申请日：2003-03-12

申请人： The Boeing Company

发明人： Scott S. Fields ,  Eric S. Meyer ,  Jeffrey S. Sermersheim

IPC分类号： G01L001/00 ,  G01L003/00 ,  G01L005/00 ,  G06F019/00

CPC分类号： G06F17/5095 ,  G01N2203/0214 ,  G06F17/5018 ,  G06F2217/04 ,  G06F2217/76

摘要： A method, system and computer program product are provided for automated fatigue and structural analysis of a structural element. The method, system and computer program product consolidate and manage the fatigue and structural analysis tools and are responsive to user requests for fatigue and structural analysis of elements based upon user-provided information regarding the element. As such, the appropriate fatigue and structural analysis tools are automatically selected and run, and the output of the tools is automatically evaluated to provide immediately useful fatigue and structural analysis results to the user without requiring further manual input. Thus, people without specialized training can quickly obtain fatigue and structural analysis results for an element. In addition, because the fatigue and structural analysis tools are integrated, the tools may be accessed from remote locations via a computer network.

摘要翻译： 提供了一种用于结构元件的自动疲劳和结构分析的方法，系统和计算机程序产品。 方法，系统和计算机程序产品整合和管理疲劳和结构分析工具，并根据用户提供的有关元素的信息，响应用户的疲劳和结构分析要求。 因此，自动选择和运行适当的疲劳和结构分析工具，并自动评估工具的输出，以便在不需要进一步手动输入的情况下向用户提供有用的疲劳和结构分析结果。 因此，没有专业训练的人可以快速获得疲劳和结构分析结果。 另外，由于疲劳和结构分析工具是集成的，所以可以通过计算机网络从远程位置访问这些工具。

公开(公告)号：US06347284B1

公开(公告)日：2002-02-12

申请号：US09126739

申请日：1998-07-31

申请人： Tatsuya Ohira ,  Yukihiko Inoue

发明人： Tatsuya Ohira ,  Yukihiko Inoue

IPC分类号： G01L100

CPC分类号： G01N19/04 ,  G01N2203/0214

摘要： A computer assisted system predicting adhesion energy at an interface between dissimilar materials, and an associated adhesiveness includes units for inputting given compositions and crystal structure of the dissimilar materials; like-atom and two unlike-atom interatomic interaction energy parameters on the dissimilar materials; and material interface atomic structure model information into a computer. The computer calculates a material interface total energy relative to a distance between surfaces of the dissimilar materials on the basis of the sum of the two like-atom and two unlike-atom interatomic interaction energies and evaluates the adhesion energy from the distribution of the calculated material interface total energy.

摘要翻译： 计算机辅助系统预测不同材料之间的界面处的粘附能，以及相关联的粘合性包括用于输入不同材料的给定组成和晶体结构的单元; 异原子和两个不同原子的原子间相互作用能量参数在异种材料上; 并将材料界面的原子结构模型信息转换成计算机。 计算机根据两个相似原子和两个不同原子的原子间原子相互作用能量的总和，计算相对于异种材料表面之间的距离的材料界面总能量，并根据计算材料的分布评估粘附能 界面总能量。

公开(公告)号：US5826213A

公开(公告)日：1998-10-20

申请号：US805466

申请日：1997-02-25

申请人： Christine Kennefick

发明人： Christine Kennefick

IPC分类号： G01N3/00 ,  G01N3/02 ,  G06F17/40 ,  G01N3/08

CPC分类号： G06F17/5009 ,  G01N2203/0066 ,  G01N2203/0214 ,  G06F2217/16

摘要： The system consists of a series of programs that enable a user to investigate possible toughening mechanisms against crack growth in composites and brittle materials consisting of different combinations of materials and containing planar interfaces and elliptically shaped microstructures. The programs begin with various materials, sizes and orientations of microstructures, distances of a crack from a material interface, and possible formulas for energy absorption mechanisms of interest to the user. They then allow a crack to advance toward an interface numerically integrate over a circular and microstructural regions and thus calculate the balance of various energy quantities during crack advance. They then transform the final calculations into a graph display of net energy per incremental length of crack advance versus crack distance from the microstructural entity in question. An advantage of the system is that it allows a user to investigate possible toughening mechanisms against fracture without testing a new specimen each time in a laboratory.

摘要翻译： 该系统包括一系列程序，使用户能够调查复合材料和由材料的不同组合和包含平面界面和椭圆形微结构组成的脆性材料中的裂纹扩展的可能的增韧机制。 程序开始于各种材料，尺寸和取向的微观结构，裂纹与材料界面的距离，以及用户感兴趣的能量吸收机制的可能公式。 然后，它们允许裂纹向界面前进，在圆形和微结构区域上数字积分，从而计算裂纹推进期间各种能量的平衡。 然后，他们将最终计算转换为每个增量的裂纹提前长度与所讨论的微结构实体的裂纹距离的净能量的图形显示。 该系统的一个优点是，它允许用户调查可能的抗骨折机制，而不是每次在实验室中测试新的标本。

公开(公告)号：US11971390B2

公开(公告)日：2024-04-30

申请号：US17438302

申请日：2020-03-13

申请人： JFE STEEL CORPORATION

发明人： Kento Fujii ,  Toyohisa Shinmiya ,  Yuji Yamasaki

IPC分类号： G01N3/08 ,  B21D22/00 ,  B21D22/02 ,  G06F30/20 ,  G06F30/23

CPC分类号： G01N3/08 ,  B21D22/00 ,  B21D22/02 ,  G06F30/20 ,  G06F30/23 ,  G01N2203/0017 ,  G01N2203/0062 ,  G01N2203/0075 ,  G01N2203/0214 ,  G01N2203/027

摘要： A method includes two or more reference strain gradient information being a relationship between the strain at the hole edge and a strain gradient along a radial direction. Hole expansion forming is performed on the evaluation metal sheet under the same forming conditions as respective forming conditions corresponding to at least two pieces of the reference strain gradient information to obtain at least two limit hole expansion ratios at a hole expansion limit of the evaluation metal sheet. A formable region of the evaluation metal sheet is obtained from the at least two pieces of the reference strain gradient information and the obtained at least two limit hole expansion ratios at the hole expansion limit. Stretch flange cracking at the sheared end face of the evaluation metal sheet is evaluated by the obtained formable region.

公开(公告)号：US11958137B2

公开(公告)日：2024-04-16

申请号：US17825657

申请日：2022-05-26

申请人： THE REGENTS OF THE UNIVERSITY OF MICHIGAN

发明人： Pingsha Dong ,  Xianjun Pei ,  Jifa Mei

IPC分类号： B23K31/02 ,  B23K31/12 ,  G01M5/00 ,  G06F30/23 ,  G06F119/04

CPC分类号： B23K31/02 ,  B23K31/12 ,  G01M5/0041 ,  G06F30/23 ,  G01N2203/0073 ,  G01N2203/0214 ,  G01N2203/0216 ,  G06F2119/04

摘要： Due to geometric discontinuities introduced by welding and joining processes, stresses or strain cannot be calculated reliably calculated using modern analytical and computer methods as result of stress or strain singularity at joint locations, which leads to severe mesh sensitivity. Design and fatigue evaluation of these structures remain empirical. This disclosure addresses mesh insensitivity of stress/strain calculations for welded structures through a cut-plane traction stress method through a novel post processing of conventional finite element computation results, as well as provides a unified fatigue evaluation procedure for fatigue design and structural life evaluation for both low-cycle and high cycle fatigue regime subjected to either proportional or non-proportional multiaxial fatigue loading, as well as a simple and reliable method for treating spot welds.