| 引用本文: | 王彩华,高立斌,刘晓燕,吴剑锋,刘帅,尚泽阳.环氧树脂基复合材料的动态响应与吸能特性[J].材料科学与工艺,2024,32(6):59-67.DOI:10.11951/j.issn.1005-0299.20230086. |
| WANG Caihua,GAO Libin,LIU Xiaoyan,WU Jianfeng,LIU Shuai,SHANG Zeyang.Dynamic response and energy absorption properties of epoxy resin composite materials[J].Materials Science and Technology,2024,32(6):59-67.DOI:10.11951/j.issn.1005-0299.20230086. |
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| 环氧树脂基复合材料的动态响应与吸能特性 |
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王彩华1,2,高立斌2,刘晓燕1,2,吴剑锋2,刘帅2,尚泽阳2
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(1.陆相页岩油气成藏及高效开发教育部重点实验室(东北石油大学),大庆 163318; 2.东北石油大学 土木建筑工程学院,大庆 163318 )
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| 摘要: |
| 为探究冲击荷载下空心玻璃微珠/环氧树脂复合材料的动态响应与破坏机制,本文采用落锤式冲击试验机对材料进行整体冲击实验,获得了不同冲击速度、不同微珠含量复合材料的破坏形态和冲击荷载-位移曲线,研究了峰值载荷、吸能量、比吸能及能量吸收率的变化规律,并引入弹性能密度和耗散能密度来分析材料的内部能量演化分配和破坏机制。结果表明,材料的破坏程度、峰值荷载、吸能量及比吸能具有明显的应变率效应。当微珠含量在10%时,峰值载荷为95 kN,比吸能为28.21 J/g,能量吸收率达到90%,储能极限为6.46 kJ/m3,显示出优良的抗冲击承载能力和能量吸收能力。由能量密度曲线可知,输入能量在应力峰值前以弹性能储存为主,应力峰值后耗散能密度急增,其冲击能量主要通过试件内部裂纹萌生、扩展及微珠破裂脱粘等损伤形式进行耗散。 |
| 关键词: 空心玻璃微珠 环氧树脂 冲击响应 吸能特性 破坏机制 |
| DOI：10.11951/j.issn.1005-0299.20230086 |
| 分类号:TB332 |
| 文献标识码:A |
| 基金项目:东北石油大学青年基金项目(2018QNQ-02). |
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| Dynamic response and energy absorption properties of epoxy resin composite materials |
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WANG Caihua1,2, GAO Libin2, LIU Xiaoyan1,2, WU Jianfeng2, LIU Shuai2, SHANG Zeyang2
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(1.MOE Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development (Northeast Petroleum University), Daqing 163318, China; 2.College of Civil Engineering and Architecture, Northeast Petroleum University, Daqing 163318,China)
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| Abstract: |
| In order to explore the dynamic response and failure mechanism of hollow glass microsphere/epoxy resin composite materials under impact loads, this study conducted overall impact tests were carried out on the materials using a drop hammer impact testing machine. The damage morphology and impact load-displacement curves of composite materials with different impact velocities and different microsphere contents were obtained. Then the variationsin peak load, energy absorption, specific energy absorption and energy absorption rate were studied. Additionally,the concepts of elastic energy density and dissipated energy density were introduced to analyze the internal energy evolution distribution and damage mechanism of the materials. The results show that the degree of damage, peak load, energy absorption and specific energy absorption of the material have significant strain rate effects. Specifically, when the microsphere content is at 10%, the peak load is 95 kN, the specific energy absorption is 28.21 J/g, the energy absorption rate reaches 90%, and the energy storage limit is 6.46 kJ/m3, showing excellent impact-bearing capacity and energy absorption capacity. According to the energy density curve, the input energy is mainly stored as elastic energy before the stress peak, while the dissipation energy density increases sharply after the stress peak. The impact energy is mainly dissipated through damage mechanisms such as the internal crack sprouting and expansion of the specimen and the damage form of microsphere rupture and debonding. |
| Key words: hollow glass microsphere epoxy resin impact response energy absorption failure mechanism |
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