使用360度三维数字图像相关系系统对弹性体多孔气的压缩性能进行研究
1College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Materials (Basel, Switzerland)
|June 28, 2023
概括
一个新的360度3D数字图像相关性 (DIC) 系统准确地测量了弹性体多孔气的压缩特性. 这个系统揭示了这些结构中的负波桑比率,进步了材料科学的理解.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 光学测量技术的使用
背景情况:
- 了解多孔材料的压缩性能对于设计先进结构至关重要.
- 现有的3D测量技术往往与全表面分析和复杂几何形状作斗争.
- 弹性体多孔圆柱体表现出独特的机械行为,需要精确的表征.
研究的目的:
- 开发和验证360度3D数字图像相关性 (DIC) 系统,用于分析弹性体多孔气.
- 研究这些材料的全场3D压力位移和应变.
- 为了确定周期圆柱形多孔结构的波桑比率.
主要方法:
- 实现一个紧的360°3D DIC系统,使用四个摄像头进行全面的表面捕捉.
- 开发一种粗细坐标匹配方法,使用3D刚体校准块和斑点图案分析来改进接.
- 通过对圆柱形外的3D形状测量来验证系统的准确性,达到0.52%的最大相对直径误差.
主要成果:
- 360° 3D DIC 系统成功地捕获了弹性体多孔气上的全表面位移和应变.
- 该系统在分析含有空隙的图像方面表现出强大性能,空隙在多孔材料中很常见.
- 在被调查的周期性圆柱形多孔结构中发现了负波桑比率.
结论:
- 拟议的360度3D DIC系统提供了一种强大而准确的方法,用于描述弹性质多孔气的压缩行为.
- 这些发现突出了设计具有定制机械反应的材料的潜力,包括辅助性质.
- 这种先进的光学测量技术为材料分析和开发开辟了新的途径.
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