基于数字图像相关技术的材料力学性能实验教学改革与实践  

Experimental Teaching Reformation and Practice of Mechanical Properties of Materials Based on Digital Image Correlation Technology

作　　者：谭小东 逯文君 宋波[1] 郭宁[1] 郭胜锋[1] Tan Xiaodong;Lu Wenjun;Song Bo;Guo Ning;Guo Shengfeng(School of Materials and Energy,Southwest University,Chongqing,400715,China;Department of Mechanical and Energy Engineering,South University of Science and Technology of China,Shenzhen,518055,China)

机构地区：[1]西南大学材料与能源学院,重庆400715 [2]南方科技大学机械与能源工程系,广东深圳518055

出　　处：《中国现代教育装备》2024年第5期22-24,37,共4页China Modern Educational Equipment

基　　金：国家自然科学基金青年科学基金项目“基于化学异质性遗传及微观应变配分调控的URA-RTQ&P钢增强增塑机理”(编号:52301172);重庆市自然科学基金面上项目“原位变形下Q&P钢的微观尺度应变配分机理研究”(编号:CSTB2022NSCQ-MSX0514);西南大学实验技术研究项目(编号:SYJ2023002,SYJ2023011);重庆市高等教育教学改革研究项目(编号:233079)。

摘　　要：实验教学是培养理工科学生创新思维和实践能力的重要手段。如何高效利用有限课时,将塑性变形、断裂失效等众多知识点有机结合,并实现可视化教学是材料力学性能实验教学改革亟待解决的关键问题。将宏/微观数字图像相关技术引入实验教学,以低碳钢常温静载荷单轴拉伸和原位变形微观应变配分检测为典型案例,对实验教学进行了创新性改革。教学实践表明,基于宏/微观DIC技术的实验教学模式,能够加深学生对吕德斯变形、应变集中及断裂失效等材料力学行为的理解,有效激发学生对材料力学性能相关知识的学习兴趣,显著提高学生在材料组织优化设计方面的创新能力。Experimental teaching is a key means to cultivate innovative thinking and practical ability for students of science and engineering.How to efficiently utilize the limited class hours,organically combining numerous knowledge points such as plastic deformation and fracture failure,and achieve visualization teaching is the key problem to be solved urgently in the experimental teaching reform for mechanical properties of materials.In this paper,digital image correlation(DIC)technology is introduced into experimental teaching.The experimental teaching has been innovatively reformed by taking the uniaxial tensile testing of low-carbon steel under static load at room temperature and the microscopic strain partition testing under in-situ deformation condition as typical cases.Teaching practice shows that the experimental teaching mode based on macro/micro DIC technology can significantly deepen the understanding of mechanical behavior such as Luders deformation,strain concentration and fracture failure for students.It can also effectively stimulate the interest in learning knowledge related to mechanical properties of materials for students,and significantly improve their innovation ability in optimization design of material microstructures.

关 键 词：材料力学性能 数字图像相关 实验教学 课程改革 

分 类 号：G434[文化科学—教育学]