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Direct Pointwise Comparison of FE Predictions to StereoDIC Measurements:Developments and Validation Using Double Edge-Notched Tensile Specimen

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1263-1298页

作者： Troy Myers Michael A.Sutton Hubert schreier Alistair Tofts Sreehari Rajan Kattil Department of Mechanical Engineering University of South CarolinaColumbiaSC29208USA Correlated Solutions Incorporated 121 Dutchman BlvdColumbiaSC29063USA

To compare finite element analysis(FEA)predictions and stereovision digital image correlation(StereoDIC)strain measurements at the same spatial positions throughout a region of interest,a field comparison procedure is developed.The procedure includes(a)conversion of the finite element data into a triangular mesh,(b)selection of a common coordinate system,(c)determination of the rigid body transformation to place both measurements and FEA data in the same system and(d)interpolation of the FEA nodal information to the same spatial locations as the StereoDIC measurements using barycentric coordinates.For an aluminum Al-6061 double edge notched tensile specimen,FEA results are obtained using both the von Mises isotropic yield criterion and Hill’s quadratic anisotropic yield criterion,with the unknown Hill model parameters determined using full-field specimen strain measurements for the nominally plane stress specimen.Using Hill’s quadratic anisotropic yield criterion,the point-by-point comparison of experimentally based full-field strains and stresses to finite element predictions are shown to be in excellent agreement,confirming the effectiveness of the field comparison process.

关键词： StereoDIC spatial co-registration data transformation finite element simulations point-wise comparison of measurements and FEA predictions double edge notch specimen model validation

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“工业里程碑”MM崇尚顶尖技术创新

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现代制造 2014年第35期 62-68页

作者： jurgen schreier

创新性强、竞争优势大、在世界各地的主要市场上活跃——政治家和行业协会领导们都喜欢用这样的词汇评价德国企业，但欧洲统计局（EPA）的最新统计数据却表明了某种变化。2013年是欧洲企业申报专利最少的一年。向EPA递交的大约2／3的专... 详细信息

创新性强、竞争优势大、在世界各地的主要市场上活跃——政治家和行业协会领导们都喜欢用这样的词汇评价德国企业，但欧洲统计局（EPA）的最新统计数据却表明了某种变化。2013年是欧洲企业申报专利最少的一年。向EPA递交的大约2／3的专利申报都不是来自欧洲。其中，24％专利申请来自美国，20％来自日本。德国以不到12％的比例勉强进入了第一梯队。

关键词：技术创新欧洲企业顶尖里程工业专利申请竞争优势行业协会

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