汽车碰撞假人皮肤的制备及其力学性能测试
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摘要
为制作汽车碰撞假人皮肤,选取线性低密度聚乙烯、聚氯乙烯两种高分子材料为基础材料,以热塑性聚氨酯为共混材料,采用物理共混的方法,通过双转子混炼机加热,配以合适的转速和混炼时间,经压片机制成皮肤薄片。对所制成的上述皮肤样品进行拉伸、冲击强度及邵氏硬度的测试及回归分析,发现其柔韧度随着热塑性聚氨酯含量的不同而不同。因此通过控制热塑性聚氨酯的含量,使得制备出的皮肤可以满足不同级别的碰撞试验对碰撞假人外附皮肤的性能要求。
As the first barrier of car collision,dummy skin plays a vital role.In this paper,linear polymer with low density polyethylene and polyvinyl chloride was elected as the raw material,and the physical blending method was used.The double rotor kneader was heated with the optimum speed and mixing time.A sheet of skin is prepared by tablet press.The tensile strength,shock strength and Shore hardness of the prepared skin were tested and analyzed,and the flexibility was found to be different depending on the TPU content.Therefore,the use of different proportions of polyurethane can make the prepared skin to meet different conditions of collision test on the impact of dummy skin attached to the performance requirements.
As the first barrier of car collision,dummy skin plays a vital role.In this paper,linear polymer with low density polyethylene and polyvinyl chloride was elected as the raw material,and the physical blending method was used.The double rotor kneader was heated with the optimum speed and mixing time.A sheet of skin is prepared by tablet press.The tensile strength,shock strength and Shore hardness of the prepared skin were tested and analyzed,and the flexibility was found to be different depending on the TPU content.Therefore,the use of different proportions of polyurethane can make the prepared skin to meet different conditions of collision test on the impact of dummy skin attached to the performance requirements.
引文
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[2]袁中凡,林大全,周兵,等.直升机防坠毁试验假人的研制与标定[J].四川大学学报,2007,39(2):160-163.Yuan Zhong-fan,Lin Da-quan,Zhou Bing,et al.The production and calibration of the helicopter antiprang experiment dummy[J].Journal of Sichuan University,2007,39(2):160-163.
[3]余翔,袁中凡,郭祚达,等.汽车正面碰撞工艺试验假人的研制[J].四川大学学报,2002,34(3):118-119.Yu Xiang,Yuan Zhong-fan,Guo Zuo-da,et al.Research on the technics experiment dummy for obverse impact on automobile[J].Journal of Sichuan University,2002,34(3):118-119.
[4]谢驰,蔡鹏,林大全,等.汽车碰撞试验假人仿生皮肤材料的冲击性能[J].汽车工程学报,2011,1(增刊1):105-107.Xie Chi,Cai Peng,Lin Da-quan,et al.Impact performance analysis of car crash test for dummy bionic skin material[J].Chinese Journal of Automotive Engineering,2011,1(Sup.1):105-107.
[5]谢驰,刘念,林大全,等.人体皮肤等效材料弹性性能的测试方法研究[J].生物医学工程学杂志,2007,24(1)∶219-221.Xie Chi,Liu Nian,Lin Da-quan,et al.Study on testing methods of the elastic nature for equivalent material of human skin[J].J Biomed Eng,2007,24(1):219-221.
[6]谢驰,陈爽,林大全,等.仿生皮肤等效材料超声波测试方法的研究[J].中国测试,2012,38(1):2-4.Xie Chi,Chen Shuang,Lin Da-quan,et al.Research on detection of bionic skin equivalent materials by ultrasonic[J].China Measurement and Test,2012,38(1):2-4.
[7]华歆.汽车碰撞试验假人仿生材料特性研究[D].长沙:湖南大学机械与汽车工程学院,2014.Hua Xin.Research on biomimetic material characteristics of vehicle crash test dummy[D].Changsha:Institute of Mechanical and Automotive Engineering,Hunan University,2014.
[8]Sarva S S,Deschanel S,Boyce M C,et al.Stressstrain behavior of a polyurea and a polyurethane from low to high strain rates[J].Polymer,2007,48(8):55-57.