CAJ | 학술논문

应用有限元软件建立三维脉冲激光辐照芳纶纤维复合材料的物理模型，获得了芳纶纤维复合材料的温度场分布及其变化规律。结果显示，随着激光功率密度的增大，芳纶纤维复合材料的温度逐渐升高；不同激光功率密度作用下的芳纶纤维复合材料的温度在光斑中心处最大并随着各位置到中心距离的增大而减小。为验证数值分析模型并更好的研究芳纶纤维复合材料的热损伤规律，试验过程中选用不同功率密度的纳秒脉冲激光辐照芳纶纤维复合材料。研究结果表明，数值模拟温度与实验温度吻合较好，最大相对误差为12.49%；随着激光功率密度的增大，芳纶纤维复合材料的焦化碳化面积逐渐增大，熔融深度随之加深。
응용유한원연건건립삼유맥충격광복조방륜섬유복합재료적물리모형，획득료방륜섬유복합재료적온도장분포급기변화규률。결과현시，수착격광공솔밀도적증대，방륜섬유복합재료적온도축점승고；불동격광공솔밀도작용하적방륜섬유복합재료적온도재광반중심처최대병수착각위치도중심거리적증대이감소。위험증수치분석모형병경호적연구방륜섬유복합재료적열손상규률，시험과정중선용불동공솔밀도적납초맥충격광복조방륜섬유복합재료。연구결과표명，수치모의온도여실험온도문합교호，최대상대오차위12.49%；수착격광공솔밀도적증대，방륜섬유복합재료적초화탄화면적축점증대，용융심도수지가심。
The physical model of three-dimensional pulse laser irradiation aramid fiber composites is estab?lished by finite element software. And the temperature field distribution and the change rules of aramid fiber com?posites are obtained. The results show that with the increasing of laser power density, the temperature of aramid fi?ber composites rises gradually. The temperature value of the composites acted by different laser power density is the maximum at facula center, and it decreases with the increasing of the distance between different points and center point. For verifying numerical analysis model and researching the thermal damage rule of aramid fiber composites, nanosecond pulse laser irradiation aramid fiber composites with different power density is chosen during the experi?ment. The research results show that numerical simulation temperature better accords with experimental tempera?ture and the maximum relative error is 12.49%. With the increasing of laser power density, the coking and carbon?ized areas of aramid fiber composites increase gradually and the melt depth will gradually deepened.