A Lagrangian inverse analysis technique for studying dynamic mechanical properites of brittle materials based on digital image correlation

DING Yuanyuan; ZHANG Zhen; LAI Huawei; WANG Yonggang

doi:10.11883/bzycj-2018-0049

Volume 38 Issue 6

Sep. 2018

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DING Yuanyuan, ZHANG Zhen, LAI Huawei, WANG Yonggang. A Lagrangian inverse analysis technique for studying dynamic mechanical properites of brittle materials based on digital image correlation[J]. Explosion And Shock Waves, 2018, 38(6): 1310-1316. doi: 10.11883/bzycj-2018-0049

Citation:

DING Yuanyuan, ZHANG Zhen, LAI Huawei, WANG Yonggang. A Lagrangian inverse analysis technique for studying dynamic mechanical properites of brittle materials based on digital image correlation[J]. Explosion And Shock Waves, 2018, 38(6): 1310-1316. doi: 10.11883/bzycj-2018-0049

Citation:

DING Yuanyuan, ZHANG Zhen, LAI Huawei, WANG Yonggang. A Lagrangian inverse analysis technique for studying dynamic mechanical properites of brittle materials based on digital image correlation[J]. Explosion And Shock Waves, 2018, 38(6): 1310-1316. doi: 10.11883/bzycj-2018-0049

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A Lagrangian inverse analysis technique for studying dynamic mechanical properites of brittle materials based on digital image correlation

doi: 10.11883/bzycj-2018-0049

Key Laboratory of Impact and Safety Engineering, Ministry of Education of China, Ningbo University, Ningbo 315211, Zhejiang, China

Received Date: 2018-02-05
Rev Recd Date: 2018-04-01
Publish Date: 2018-11-25

Abstract

Abstract

Based on the Hopkinson pressure bar and digital image correlation (DIC) techniques, a new Lagrangian inverse analysis experimental method was proposed to study the dynamic constitutive relation of brittle materials. A series of speckle images of long specimen deformation were recorded by an ultra-high-speed camera. The speckle images were processed by DIC to derive the velocity fields and strain fields on the surface of a long specimen. Based on the multi-particles velocity history curves measured by DIC, the whole velocity fields were constructed by many path lines. Then, a Lagrangian inverse analysis method was established for the dynamic constitutive relation of brittle rate-dependent PMMA materials by numerical solution. The results were compared with those of Hopkinson pressure bar test and quasi-static compression test, which display the characteristics of viscoelastic constitutive response of PMMA under the condition of small strain.
- Lagrangian inverse analysis,
- digital image correlation,
- ultra-high-speed camera,
- brittle material,
- dynamic constitutive relation

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References(26)

References

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