| 许良,涂宜鸣,崔浩,周松,贾耀雄,边钰博.T800碳纤维复合材料低速冲击渐进损伤仿真与试验研究[J].,2021,61(6):608-614 |
| T800碳纤维复合材料低速冲击渐进损伤仿真与试验研究 |
| Simulation and experimental research on progressive damage of T800 carbon fiber composites under low velocity impact |
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| DOI：10.7511/dllgxb202106008 |
| 中文关键词:T800碳纤维/环氧树脂基复合材料ABAQUS数值模拟低速冲击凹坑深度损伤形貌 |
| 英文关键词:T800 carbon fiber / epoxy resin matrix compositesABAQUS numerical simulationlow velocity impactpit depthdamage morphology |
| 基金项目:国家自然科学基金资助项目(51775355). |
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| 摘要点击次数:150 |
| 全文下载次数:182 |
| 中文摘要: |
| 利用有限元软件ABAQUS建立冲击渐进损伤模型，对国产T800碳纤维/环氧树脂基复合材料的低速冲击损伤进行了数值模拟；同时对复合材料进行低速冲击试验，通过分析不同冲击能量与凹坑深度和损伤形貌的关系研究了层合板的冲击损伤特性．结果表明：在模拟仿真过程中，复合材料冲击时的应力分布像花生状的椭圆形，同时基体的拉伸和压缩损伤大于纤维的拉伸和压缩损伤．在试验中随着冲击能量增大，凹坑深度在35 J左右出现拐点，拐点之前凹坑深度增加缓慢，冲击表面主要是无损伤和几乎不可见的冲击损伤，内部损伤形貌近似圆形；拐点后凹坑深度急剧增加，试样内部损伤形貌逐渐趋于椭圆形，并沿45°铺层方向呈锥形扩展；在65 J时达到穿透性损伤．模拟得到的凹坑深度与试验结果吻合较好，为分析T800碳纤维/环氧树脂基复合材料层合板受低速冲击后的损伤演化和规律提供了一种有效的方法． |
| 英文摘要: |
| The impact progressive damage model was established by the finite element software ABAQUS, and the low velocity impact damage of domestic T800 carbon fiber / epoxy resin matrix composites was numerically simulated. Then, the low velocity impact test of the composites was carried out, and the impact damage characteristics of the laminate were studied by analyzing the relationship between different impact energy and pit depth and damage morphology. The results show that in the simulation, the tensile and compression damage of the matrix is greater than that of the fiber, and the stress distribution of the composite material under impact is like a peanut shaped ellipse. In the experiment, with the increase of impact energy, the depth of the pit shows an inflection point at about 35 J. The pit depth increases slowly before the inflection point, the impact surface is mainly non damage and almost invisible impact damage, and the internal damage morphology is approximately circular. The depth of the pit increases sharply after the inflection point, the internal damage morphology of the sample gradually tends to be elliptical, and expands into a cone along the 45° layering direction, reaching penetrating damage at 65 J. The simulated pit depth is in good agreement with the experimental results, which provides an effective method for analyzing the damage evolution and law of T800 carbon fiber / epoxy resin matrix composite laminates subjected to low velocity impact. |
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