| PROGRESSIVE FRACTURE MODELING OF THE FAILURE WAVE IN IMPACTED GLASS |
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| 作者姓名： | Yao Guowen Liu Zhanfang Huang Peiyan |
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| 作者单位： | Yao Guowen (College of Civil Engineering and Architecture，Chongqing Jiaotong University，Chongqing 400074，China) Liu Zhanfang (Department of Engineering Mechanics，Chongqing University，Chongqing 400044，China) Huang Peiyan (College of Traffic and Communications，South China University of Technology，Guangzhou 510640，China) |
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| 摘 要： | The failure wave has been observed propagating in glass under impact loading since 1991. It is a continuous fracture zone which may be associated with the damage accumulation process during the propagation of shock waves. A progressive fracture model was proposed to describe the failure wave formation and propagation in shocked glass considering its heterogeneous meso-structures. The original and nucleated microcracks will expand along the pores and other defects with concomitant dilation when shock loading is below the Hugoniot Elastic Limit. The governing equation of the failure wave is characterized by inelastic bulk strain with material damage and fracture. And the inelastic bulk strain consists of dilatant strain from nucleation and expansion of microcracks and condensed strain from the collapse of the original pores. Numerical simulation of the free surface velocity was performed and found in good agreement with planar impact experiments on K9 glass at China Academy of Engineering Physics. And the longitudinal, lateral and shear stress histories upon the arrival of the failure wave were predicted, which present the diminished shear strength and lost spall strength in the failed layer.
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| 关 键 词： | 失效波 断裂模型 玻璃 平面撞击 |
| 收稿时间： | 2004-07-19 |
| 修稿时间： | 2006-01-18 |
PROGRESSIVE FRACTURE MODELING OF THE FAILURE WAVE IN IMPACTED GLASS |
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| Yao Guowen Liu Zhanfang Huang Peiyan.PROGRESSIVE FRACTURE MODELING OF THE FAILURE WAVE IN IMPACTED GLASS[J].Acta Mechanica Solida Sinica,2006,19(1):69-74. |
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| Authors: | Yao Guowen Liu Zhanfang Huang Peiyan |
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| Institution: | 1. Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands;2. TNO Defence, Security and Safety, Rijswijk, The Netherlands;1. Institute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., Tomsk 634055, Russia;2. National Research Tomsk State University, 36 Lenin ave., Tomsk 634050, Russia;1. Department of Material Science & Engineering, Ghent University, Technologiepark-Zwijnaarde 903, 9052 Ghent, Belgium;2. Institute of Structural Mechanics and Design, Technische Universität Darmstadt, Franziska-Braun-Straße 3, 64287 Darmstadt, Germany |
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| Abstract: | The failure wave has been observed propagating in glass under impact loading since 1991. It is a continuous fracture zone which may be associated with the damage accumulation process during the propagation of shock waves. A progressive fracture model was proposed to describe the failure wave formation and propagation in shocked glass considering its heterogeneous meso-structures. The original and nucleated microcracks will expand along the pores and other defects with concomitant dilation when shock loading is below the Hugoniot Elastic Limit. The governing equation of the failure wave is characterized by inelastic bulk strain with material damage and fracture. And the inelastic bulk strain consists of dilatant strain from nucleation and expansion of microcracks and condensed strain from the collapse of the original pores. Numerical simulation of the free surface velocity was performed and found in good agreement with planar impact experiments on K9 glass at China Academy of Engineering Physics. And the longitudinal, lateral and shear stress histories upon the arrival of the failure wave were predicted, which present the diminished shear strength and lost spall strength in the failed layer. |
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| Keywords: | the failure wave progressive fracture model glass planar impact |
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