材料破坏过程可视化实验教学方法研究
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摘要
基于数字图像相关技术,提出材料破坏过程可视化的实验教学方法,并以混凝土材料为例,介绍该方法在劈拉与单轴压缩实验中的应用及其效果。通过监测混凝土劈拉与压缩破坏过程,分析了该材料破坏模式,揭示了混凝土材料劈拉与压缩破坏机理。应用数字图像相关方法获得试件表面应变场分布,验证了材料破坏机理,并提出适用的破坏强度理论。
A visual experimental teaching method for the material failure based on the digital image correlation technique is presented in this paper. Taking the concrete material as an example, this presented method is applied in the splitting tension and uniaxial compression tests. The splitting tensile and compressive failure processes are monitored, and the failure modes are analyzed to reveal the failure mechanisms of the concrete material in the splitting tension and compression. The strain distribution of the specimen is obtained using the digital image correlation method. The above results confirm the failure mechanisms of the concrete material and the applicable failure strength theory.
A visual experimental teaching method for the material failure based on the digital image correlation technique is presented in this paper. Taking the concrete material as an example, this presented method is applied in the splitting tension and uniaxial compression tests. The splitting tensile and compressive failure processes are monitored, and the failure modes are analyzed to reveal the failure mechanisms of the concrete material in the splitting tension and compression. The strain distribution of the specimen is obtained using the digital image correlation method. The above results confirm the failure mechanisms of the concrete material and the applicable failure strength theory.
引文
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2徐世烺.混凝土断裂力学.北京:科学出版社,2011Xu Shilang.Fracture Mechanics of Concrete.Beijing:Science Press,2011(in Chinese)
3张顺庆,高晨家,张龙.数字图像相关技术在应力应变测量中的发展与最新应用.影像科学与光化学,2017,35(2):193-198Zhang Shunqing,Gao Chenjia,Zhang Long.The development and latest applications of digital image correlation in stress and strain measurement.Imaging Science and Photochemistry,2017,35(2):193-198(in Chinese)
4苏勇,张青川,伍小平.数字图像相关技术的一些进展.中国科学:物理学力学天文学,2018,48(9):094604Su Yong,Zhang Qingchuan,Wu Xiaoping.Progress in digital image correlation method.Scientia Sinica Physica Mechanics&Astronomica,2018,48(9):094604(in Chinese)
5马涌上,陈卫忠,杨典森等.基于三维数字图像相关技术的脆性岩石破坏试验研究.岩土力学,2017,38(1):117-123Ma Yongshang,Chen Weizhong,Yang Diansen,et al.Experimental study of brittle rock failure based on treedimensional digital image correlation technique.Rock and Solid Mechanics,2017,38(1):117-123(in Chinese)
6房亮,唐兆琛,杨福俊等.数字图像相关方法在鼻孔泡沫铝压缩试验中的应用.实验力学,2008,23(2):162-168Fang Liang,Tang Zhaochen,Yang Fujun,et al.Compressive test of closed-cell aluminum foam based on digital image correlation method.Journal of Experimental Mechanics,2008,23(2):162-168(in Chinese)
2徐世烺.混凝土断裂力学.北京:科学出版社,2011Xu Shilang.Fracture Mechanics of Concrete.Beijing:Science Press,2011(in Chinese)
3张顺庆,高晨家,张龙.数字图像相关技术在应力应变测量中的发展与最新应用.影像科学与光化学,2017,35(2):193-198Zhang Shunqing,Gao Chenjia,Zhang Long.The development and latest applications of digital image correlation in stress and strain measurement.Imaging Science and Photochemistry,2017,35(2):193-198(in Chinese)
4苏勇,张青川,伍小平.数字图像相关技术的一些进展.中国科学:物理学力学天文学,2018,48(9):094604Su Yong,Zhang Qingchuan,Wu Xiaoping.Progress in digital image correlation method.Scientia Sinica Physica Mechanics&Astronomica,2018,48(9):094604(in Chinese)
5马涌上,陈卫忠,杨典森等.基于三维数字图像相关技术的脆性岩石破坏试验研究.岩土力学,2017,38(1):117-123Ma Yongshang,Chen Weizhong,Yang Diansen,et al.Experimental study of brittle rock failure based on treedimensional digital image correlation technique.Rock and Solid Mechanics,2017,38(1):117-123(in Chinese)
6房亮,唐兆琛,杨福俊等.数字图像相关方法在鼻孔泡沫铝压缩试验中的应用.实验力学,2008,23(2):162-168Fang Liang,Tang Zhaochen,Yang Fujun,et al.Compressive test of closed-cell aluminum foam based on digital image correlation method.Journal of Experimental Mechanics,2008,23(2):162-168(in Chinese)