Structure-mechanical property relationship in fused deposition modelling
Structure-mechanical property relationship in fused deposition modelling
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DOI：
10.1179/1743284715y.0000000010
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发表时间：
2015-05-01
影响因子：
1.8
通讯作者：
Babu, S. S.
中科院分区：
文献类型：
--
作者：
Rezayat, H.;Zhou, W.;Babu, S. S.
使用平面几何狗骨样品研究了通过热塑性聚合物的熔融沉积建模（FDM）制造的部件的细丝尺度现象和宏观性质之间的关系，所述狗骨样品代表增材制造部件中的逐层薄层。将FDM部件在多个长度尺度（灯丝到宏）下的响应的有限元模拟与针对不同光栅角度和灯丝间隙实验获得的全场应变数据进行比较。的应变场，应变能密度，和有效的杨氏模量进行评估。随着气隙的增加，由施加的轴向载荷产生的主应变在某些光栅角度下从内光栅转移到FDM平面样品的轮廓，这显著降低了材料的有效利用率，导致应变局部化和部件过早失效。提出的研究提供了一个有效的多尺度方法来优化光栅轮廓填充模式的途径。
The relationship between the filament scale phenomena and the macroscopic properties of parts manufactured by fused deposition modelling (FDM) of thermoplastic polymers has been investigated using planar geometry dog bone samples, representing layer by layer lamina in an additively manufactured part. Finite element simulations of the response of the FDM part(s) at multiple length scales (filament to macro) are compared with full field strain data obtained experimentally for different raster angles and filament gaps. The strain field, strain energy density, and effective Young's modulus are evaluated. Principal strains resulting from the applied axial loading shifted from the inner rasters to the contours of the FDM planar sample at certain raster angles as the air gap increased, which significantly decreased the effective usage of the material leading to strain localization and premature part failure. The research presented provides a pathway to an effective multiscale approach to optimise the raster contour fill pattern.