3D打印模型在光弹性法教学中的应用研究  

THE APPLICATION OF 3D PRINTING TECHNIQUE IN PHOTOELASTICITY TEACHING

作　　者：任张瑜 谢惠民 鞠杨[2] REN Zhangyu;XIE Huimin;JU Yang(AML,School of Aerospace Engineering,Tsinghua University,Beijing 100084,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]清华大学航天航空学院应用力学教育部重点实验室,北京100084 [2]中国矿业大学(北京),煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《力学与实践》2022年第1期163-170,共8页Mechanics in Engineering

基　　金：国家自然科学基金(52004134,12032013);中国博士后基金(2019M660662);国家重点研发计划(2017YFB1103900);国家重大科研仪器研制项目(51727807)资助。

摘　　要：本文将3D打印技术引入光弹性法的教学中,解决了传统技术制作光弹模型时成型周期长、试样初始残余应力较大等问题。以圆盘为例,详细介绍了3D打印光弹模型的制备过程。基于光弹系统测量得到了对径受压模型内部的等倾线、等色线相位和条纹值。制备了含不同形状孔隙的教学模型,丰富了课堂内容。展示了数字模型设计、物理模型制备、光弹条纹图采集、应力场提取等过程,有助于学生对光弹材料制造过程、测试原理与核心技术的理解。In this study,3 D printing technique was introduced in the teaching of photoelasticity to fabricate model,which overcome the difficulties in traditional photoelasticity method,such as time consuming and high residual stress.A disk was used as an example to showcase the fabrication processes in 3 D printing.Isoclinic and isochromatic phases and the photoelastic material stress fringe value were calculated based on a photoelastic measurement system.The introducing of 3 D printing technique into photoelasticity makes it possible to teach and present the whole processes,from the design of digital models,to the fabrication of physical models,to the capture of photoelastic patterns,and finally to the extracting of stress fields.It helps students to better understand the fabrication process of photoelastic materials,measurement philosophy and key technology of photoelasticity.

关 键 词：光弹性法 3D打印技术 模型制备 相位计算 应力条纹值 

分 类 号：O348.1[理学—固体力学]