Representation of Fracture Micro Surface of Metals using Virtural Reality

使用虚拟现实表示金属断裂微表面

• 批准号: 06555025
• 负责人: SAKAI Shinsuke
• 金额: $ 5.5万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555025/
• 关键词: Virtual Reality; Electron Microscope; Fractography; FRASTA; Image Processing; Strength of Materials

Outline : in the fractographical analysis, the detailed fracture process that occurred inside the material can be understood well by using the technology called fracture-surface topography analysis (FRASTA). In this research, virtual reality technology is introduced into FRASTA,and its applicability is examined.Development of System : The SEM topographical data are transfered to the graphic workstation and are analyzed using the technique of virtual reality. Furthermore, the virtual reality software aid to provide us with a quasi-experience within the micrograhpic space.Algorithm : Two conjugate surfaces, are shown on the display simultaneously first. Then one of them is moved relatively to the other fixed surface. The surface is either moved in parallel or rotated. Relative distance between two surfaces is calculated and the contour map of the distance is drawn. By observing this contour map, we can acknowledg the degree of matching easily. If we are not satisfied with the result, we will return to the matching step. This iteration is repeated until the satisfactory result is obtained.Examples : Apllying the developed method to the fracture surfaces of the fatigue under random loads, the following performaces are confirmed. 1.Observation of the fracture process by matching two conjugate surfaces. 2.Observation of the series of fractured area-projection plots. 3.Animation drawing of the fracture process.Conclusion : It is shown that the developed graphic system using virtual reality enables us to get into the micro space and to manipulate virtual surfaces under arbitrary requirements. And thus it becomes easier to understand the microfracture process.

概述：在断口形貌分析中，利用断口表面形貌分析（FRASTA）技术可以很好地了解材料内部发生的详细断裂过程。本研究将虚拟现实技术引入FRASTA，并对其适用性进行了检验。系统开发：将扫描电镜形貌数据传输到图形工作站，利用虚拟现实技术进行分析。此外，虚拟现实软件帮助我们提供了一个准的经验，在micrograhpic空间。算法：两个共轭曲面，显示在显示器上同时第一。然后其中一个相对于另一个固定表面移动。曲面可以平行移动或旋转。计算出两个曲面之间的相对距离，并绘制出该距离的等值线图。通过观察该等值线图，我们可以很容易地确定匹配程度。如果我们对结果不满意，我们将返回到匹配步骤。将本文方法应用于随机载荷作用下的疲劳断裂面，得到了如下结果：1.用两个共轭曲面匹配法观察断裂过程。2.一系列断裂面积投影图的观察。3.结论：利用虚拟现实技术开发的图形系统使我们能够进入微观空间，并根据任意要求操纵虚拟表面。因此，它变得更容易理解微断裂过程。

项目成果

S. SAKAI, H.UMEMOTO H. OKAMURA and T. TAKANO: "3D Analysis of Fracture Surface Using Virtual Reality" 日本機械発会講演論文集. 95-1(III). 143-144 (1995)

S. SAKAI、H.UMEMOTO H. OKAMURA 和 T. TAKANO：“使用虚拟现实进行断裂表面的 3D 分析”日本机械协会会议记录 95-1(III) (1995)。

S. SAKAI, H. OKAMURAM, M. NOMURA and H.UMEMOTO: "3D Analysis of SEM Picture Using Delaunay Triangulation" 日本機械学会講演論文集. 940(10)II. 577-579 (1994)

S. SAKAI、H. OKAMURAM、M. NOMURA 和 H.UMEMOTO：“使用 Delaunay 三角测量对 SEM 图片进行 3D 分析”日本机械工程师协会会议记录 940(10)II 577-579 (1994)。

S. SAKAI, H.UMEMOTO M. NOMURA and H. OKAMURAM: "3D Analysis of Fracture Surface Using Delaunay Triangulation(2nd Report, Analysis of Arbitrary Points)" 日本機械学会講演論文集. 940(30)I. 450-452 (1994)

S. SAKAI、H.UMEMOTO M. NOMURA 和 H. OKAMURAM：“使用 Delaunay 三角测量进行断裂表面的 3D 分析（第二次报告，任意点分析）”日本机械工程师学会会议记录 940(30)I。 -452 (1994)

S.SAKAI,H.UMEMOTO,H.OKAMURA and T.TAKANO: ""3D Analysis of Fracture Surface Using Virtual Reality"" Prepr.JSME. No.95-1 [VI]. 143-144 (1995)

S.SAKAI、H.UMEMOTO、H.OKAMURA 和 T.TAKANO：“使用虚拟现实进行断裂表面的 3D 分析”Prepr.JSME。

S.SAKAI,H.UMEMOTO,M.NOMURA and H.OKAMURA: ""3D Analysis of Fracture Surface Using Delaunnay Triangulation" (2nd Report, Analysis of Arbitrary Points)" Prepr.JSME. No.940 (30) I. 450-452 (1994)

S.SAKAI、H.UMEMOTO、M.NOMURA 和 H.OKAMURA：“使用 Delaunnay 三角测量进行断裂表面的 3D 分析”（第二次报告，任意点分析）”Prepr.JSME。