摘要
为了3D打印工程塑料被更合理地使用,通过试验了解3D打印工程塑料的特殊力学性能,并建立其力学模型。首先将3D打印工程塑料根据不同的方向与不同的纤维直径,利用3D打印设备打印出狗骨状试件,然后按照试验标准利用INSTRON 5966材料试验平台对其进行材料拉伸试验。发现其力学性能具有明显的各向异性,在纤维方向具有弹塑性的特点;垂直纤维方向有弹脆性的特点;在垂直纤维方向纤维直径越大则失效应变越大;在纤维方向时,纤维直径等于0.25 mm时屈服强度和极限载荷有着明显的提高,纤维直径等于0.3 mm时破坏位移/应变是最大的。并利用Mazars损伤模型描述了3D打印工程塑料的力学本构模型。最后分析了3D打印工程塑料的特殊力学特性对其使用的特殊要求与运用。
For more reasonable application of 3D printing plastic, its special mechanical property is obtained through experiment, and the mechanical model is built. First, the dog-bone specimens are printed using the engineering plastic by 3D printing service considering both anisotropic and fibre diameter. Then, the tensile test is conducted using ISTRON 5966 material testing platform according to the test standard. It is found that （1） the specimens have obvious anisotropy, elastic-plastic property in fibre direction and elasto-brittle property in vertical direction of fibre; （2） In the vertical direction of fibre, the failure strain of 3D printing material is larger with larger fibre diameter; （3） in the fibre direction, the yield strength and ultimate load are greatly improved when fibre diameter equals to 0.25 mm, and the maximum failure displacement/strain happens when fibre diameter equals to 0. 3 mm. Afterwards, the mechanical constitutive model of the 3D printing plastic is built based on Mazars damage model. At last, the potential notice for using the 3D printing material due to the special mechanical behavior is discussed.
出处
《公路交通科技》
CAS
CSCD
北大核心
2017年第1期149-153,共5页
Journal of Highway and Transportation Research and Development
基金
中央基本科研业务费(YWF-16-RSC-011)
关键词
汽车工程
力学性能
拉伸测试
工程塑料
3D打印
vehicle engineering
mechanical behavior
tension tests
engineering plastic
3D printing
