| 陶瓷纤维混凝土冲击力学响应及统计损伤本构模型试验研究 |
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| 引用本文： | 苏灏扬, 许金余, 白二雷, 高志刚, 陈勇. 陶瓷纤维混凝土冲击力学响应及统计损伤本构模型试验研究[J]. 工程力学, 2013, 30(6): 148-153. DOI: 10.6052/j.issn.1000-4750.2011.12.0851 |
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| 作者姓名： | 苏灏扬 许金余 白二雷 高志刚 陈勇 |
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| 作者单位： | 1.空军工程大学工程学院机场建筑工程系，西安710038;;2.西北工业大学力学与土木建筑学院，西安710072;;3.中国航空港建设第九工程总队，新津611430 |
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| 基金项目： | 国家自然科学基金项目(51078350)；陕西省自然科学基金项目(2010JQ6011) |
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| 摘 要： | 采用Φ100mm分离式霍普金森压杆(SHPB)试验装置对陶瓷纤维混凝土的动态力学性能进行研究，并验证了试验结果的有效性；基于IPBS模型(修正平行杆模型)，建立考虑应变率效应的混凝土单轴受压统计损伤本构模型，模拟陶瓷纤维混凝土的动态损伤破坏过程。结果表明：陶瓷纤维对普通硅酸盐混凝土的增强增韧效果明显，尤其是在高应变率范围内；SHPB试验过程中应力均匀性和恒应变率加载条件得到了较好地满足；动态损伤本构模型提供曲线与试验曲线吻合较好，能够较为准确地描述陶瓷纤维混凝土破坏前的应力应变关系。
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| 关 键 词： | 陶瓷纤维 霍普金森压杆 动态力学性能 应变率 本构模型 |
| 收稿时间： | 2013-06-27 |
| 修稿时间： | 2013-06-27 |
STUDY OF IMPACT MECHANICAL RESPONSE AND STATISTICAL DAMAGE CONSTITUTIVE MODEL OF CERAMIC FIBER REINFORCED CONCRETE |
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| SU Hao-yang, XU Jin-yu, BAI Er-lei, GAO Zhi-gang, CHEN Yong. STUDY OF IMPACT MECHANICAL RESPONSE AND STATISTICAL DAMAGE CONSTITUTIVE MODEL OF CERAMIC FIBER REINFORCED CONCRETE[J]. Engineering Mechanics, 2013, 30(6): 148-153. DOI: 10.6052/j.issn.1000-4750.2011.12.0851 |
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| Authors: | SU Hao-yang XU Jin-yu BAI Er-lei GAO Zhi-gang CHEN Yong |
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| Affiliation: | 1.Department of Airfield and Building Engineering,Air Force Engineering University Engineering Institute,Xi’an 710038,China;;2.College of Mechanics and Civil Architecture,Northwest Polytechnic University,Xi’an 710072,China;;3.The Ninth Engineering Bridge of Chinese Airport Construction,Xinjin 611430,China |
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| Abstract: | A 100-mm-diameter split Hopkinson pressure bar (SHPB) apparatus is used to study the dynamic mechanical properties of ceramic fiber reinforced concrete (CRFRC) experimentally.The validity of the test has been approved.The statistical damage constitutive model of CRFRC under uniaxial impact compressive load is established based on an improved parallel bar system model (IPBS) to simulate the dynamic damage process.The results show that ceramic fibers can enhance the strength and the toughness of plain concrete remarkably,especially when the specimens are loaded in a high strain rate.The stress equilibrium and the constant strain rate are satisfied during the test by means of pulse shaping technique.The stress-strain curves derived from the constitutive model are consistent with the test results,and enable to predict the stress-strain relationship of CRFRC accurately before its damage. |
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| Keywords: | ceramic fiber split Hopkinson pressure bar dynamic mechanical property strain rate constitutive model |
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