3D打印柔性材料特性及有限元分析方法研究
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摘要
针对3D打印柔性材料特性及有限元分析问题,对3D打印柔性试件的力学特性和有限元仿真方法进行了研究。通过对不同打印条件的柔性试件进行了单轴拉伸实验,测量了试件的力学特性,得到了打印条件对试件弹性模量和泊松比的影响;利用单轴拉伸实验得到的应力应变数据和不同的Abaqus有限元仿真方法对试件进行了分析,得到了3D打印柔性材料的最佳仿真方法,并利用复杂结构零件的仿真结果对仿真方法进行了验证。研究结果表明:层高和打印方向会影响3D打印柔性试件的弹性模量和泊松比;不同打印条件的试件可等效为不同材料的试件进行仿真,将3D打印柔性材料设置为超弹性体时仿真效果最好。
Aiming at the problems of property and finite element analysis of 3D printing flexible material,the mechanical properties and the simulation method with finite element of 3 D printing flexible specimens were studied. Experimental study on the mechanical properties with flexible specimens under different printing conditions were carried out,the effect of printing conditions on the elastic modulus and Poisson's ratio of the specimens was gotten. The specimen was simulated with stress and strain data from uniaxial tensile test and different finite element analysis method of Abaqus,the best method for simulating 3D printing flexible material was obtained,and the method was verified with the simulations of complex structural components. The results indicate that the height and printing direction could affect the elastic modulus and Poisson's ratio of the 3D printing flexible specimens. Specimens with different printing conditions could be equivalent to specimens of different materials,and the simulation result is the best when the 3D printing flexible material,which is set as hyper-elastic material.
Aiming at the problems of property and finite element analysis of 3D printing flexible material,the mechanical properties and the simulation method with finite element of 3 D printing flexible specimens were studied. Experimental study on the mechanical properties with flexible specimens under different printing conditions were carried out,the effect of printing conditions on the elastic modulus and Poisson's ratio of the specimens was gotten. The specimen was simulated with stress and strain data from uniaxial tensile test and different finite element analysis method of Abaqus,the best method for simulating 3D printing flexible material was obtained,and the method was verified with the simulations of complex structural components. The results indicate that the height and printing direction could affect the elastic modulus and Poisson's ratio of the 3D printing flexible specimens. Specimens with different printing conditions could be equivalent to specimens of different materials,and the simulation result is the best when the 3D printing flexible material,which is set as hyper-elastic material.
引文
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[2]卢秉恒,李涤尘.增材制造(3D打印)技术发展[J].机械制造与自动化,2013,42(4):1-4.
[3]邓钢锋.工业级3D打印机调研[J].机械工程师,2014(12):134-136.
[4]杨德建,刘仁洪.大型复杂金属件3D打印技术及研究进展[J].兵工自动化,2017,36(2):8-12.
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