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论文:2012,Vol:30,Issue(4):518-523 |
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引用本文： |
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姚振华, 李亚智, 刘向东, 李彪, 李玺. 复合材料层合板低速冲击后剩余压缩强度研究[J]. 西北工业大学 |
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Yao Zhenhua, Li Yazhi, Liu Xiangdong, Li Biao, Li Xi. Effectively Calculating Residual Compressive Strength of Composite Laminate after Impact (CAI)[J]. Northwestern polytechnical university |
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| 复合材料层合板低速冲击后剩余压缩强度研究 |
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| 姚振华, 李亚智, 刘向东, 李彪, 李玺 |
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| 西北工业大学 航空学院,陕西 西安 710072 |
| 摘要: |
| 应用有限元显式算法计算层合板冲击后压缩强度(CAI值)。建立实体单元与cohesive界面单元相结合的层合板有限元分析模型。首先进行层合板受离面低速冲击中损伤过程的数值模拟,再以该步分析结果(损伤状态)作为初始损伤,进行面内压缩下层合板破坏过程数值模拟。从而实现了层合板从冲击损伤到冲击后压缩破坏的全过程分析。模型应用面内和层间损伤逐渐累积的算法。通过不同加载速率下的分析,考察了显式算法在准静态CAI计算中的可用性。冲击损伤特征、冲击后压缩破坏特征及CAI的计算值与试验结果有良好的一致性,表明文中所采用的模型、算法与损伤处理方法是合理的。 |
| 关键词:
复合材料
计算机模拟
分层
有限元法
冲击阻抗
冲击后压缩
低速冲击
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| Effectively Calculating Residual Compressive Strength of Composite Laminate after Impact (CAI) |
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| Yao Zhenhua, Li Yazhi, Liu Xiangdong, Li Biao, Li Xi |
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| College of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| The explicit finite element model was established using the solid elements and interfacial cohesive ele-ments. A two-step calculation procedure was established. Sections 1 through 3 of the full paper explain our methodof calculation mentioned in the title，which we believe is effective and whose core consists of: (1) the out of planelow-velocity impact process was simulated first; the results of the first step, namely the state of the damages and de-formation, were taken as the input for the second step to simulate the in-plane compression, until the collapse of thelaminate; the strength criterion and a stiffness degradation scheme were utilized to characterize various types of thein-plane damages; the initiation and propagation of the delamination damage was estimated with the cohesive ele-ments according to the failure criteria and critical energy release rate criterion respectively; (2) the usefulness ofthe explicit solution algorithm in dealing with the quasi-static procedure of the in-plane compression was investigatedby examining the effect of different velocities of the compression loading on the CAI values. The simulation resultsfor the impact damages and the compression-after impact damages，presented in Figs. 3 through 7 excepting 5 andTables 3 through 5，and their analysis show preliminarily that they are indeed in fairly good agreement with the ex-perimental ones. |
| Key words:
composite materials
computer simulation
delamination
finite element method
impact resistance
compression after impact
low-velocity impact
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| 收稿日期: 2011-10-22
修回日期:
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| DOI: |
| 通讯作者:
Email： |
| 作者简介: 姚振华(1987-),西北工业大学硕士研究生,主要从事复合材料结构力学的研究。
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| 相关功能 |
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| 作者相关文章 |
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| 姚振华 在本刊中的所有文章 |
| 李亚智 在本刊中的所有文章 |
| 刘向东 在本刊中的所有文章 |
| 李彪 在本刊中的所有文章 |
| 李玺 在本刊中的所有文章 |
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参考文献: |
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[1] 林智育, 许希武. 复合材料层板低速冲击后剩余压缩强度. 复合材料学报, 2008, 25(1): 140-146Lin Zhiyu，Xu Xiwu. Residual Compressive Strength of Composite Laminates After Low-Velocity Impact. Acta Materiae Com-positae Sinica, 2008, 25(1): 140-146 (in Chinese)
[2] Hou J P，Petrinic N，Ruiz C，et al. Prediction of Impact Damage in Composite Plates. Composites Science and Technology，2000, 60(2): 273-281
[3] Huang Chienhua，Lee Yajung. Experiments and Simulation of the Static Contact Crush of Composite Laminated Plates. Compos-ite Structures, 2003, 61(3): 265-270
[4] Camanho P P, Matthews F L. A Progressive Damage Model for Mechanically Fastened Joints in Composite Laminates. Journal ofComposite Materials, 1999, 23: 2248-2280
[5] Daudeville L，Allix O，Ladevèze P. Delamination Analysis by Damage Mechanics: Some Applications. Composites Engineer-ing. 1995, 5(1): 17-24
[6] Turon A，Camanho P P. An Engineering Solution for Mesh Size Effects in the Simulation of Delamination Using Cohesive ZoneModels. Engineering Fracture Mechanics, 2007, 74: 1665-1682 |
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