Temperature Field Simulation of Wood Powder/PES Composite Powder Material

2015 ◽  
Vol 667 ◽  
pp. 218-223
Author(s):  
Yue Qiang Yu ◽  
Yan Ling Guo ◽  
Kai Yi Jiang
Keyword(s):  
Temperature Field ◽  
Heat Source ◽  
Powder Material ◽  
Laser Power ◽  
Composite Powder ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Powder Materials ◽  
Wood Powder ◽  
Composite Powder Material

In view of the physical process of the wood powder/PES composite powder material selective laser sintering forming ,this article establishes the plane moving Gaussian heat source as the input laser heat source model .Based on selective laser sintering wood powder/PES composite powder sintering theory and combined with thermal conductivity of composite powder, specific heat, density and other related theoretical analytical models .It establishes three dimensional finite element model of selective laser sintering process of wood powder/PES composite powder transient temperature field .The laser sintering simulation experiment of wood powder/PES composite powder under different laser power obtains temperature field distribution law of the wood powder/PES composite powder forming under different laser power distribution, and the influence of the forming parts forming quality of wood powder/PES composite powder materials caused by the temperature field. The simulation results also provide certain theoretical basis for the choice of laser power in the subsequent laser sintering experiment.

scholarly journals EVALUATION OF THE IMPROVEMENT RP POWDER STEREO-SHAPED TECHNIQUES TO DIRECTLY SOLIDIFIED MODELING OF BIOCHEMISTRY COMPOSITE POWDER MATERIAL

2006 ◽  
Vol 18 (04) ◽  
pp. 198-201 ◽  
Author(s):  
SHUH-PING SUN ◽  
YI-JIUN CHOU ◽  
W. L. YAO ◽  
YU-FU CHEN
Keyword(s):  
Rapid Prototyping ◽  
Bone Graft ◽  
Powder Material ◽  
Composite Powder ◽  
Powder Materials ◽  
Graft Material ◽  
Bone Graft Material ◽  
Composite Powder Material ◽  
Bone Filling

This study apply the RP powder stereo-shaped techniques and using standard biochemistry materials to discuss how biochemistry composite powder material can directly be solidified by using rapid prototyping machines to become bone-filling graft for missing bone on clinical surgery. As for the materials of implants, the research using commercialized composite powder materials. Concerning the making of bone filling model, this study uses 3D Anthropometrics bone image and using the related images editing system to simulate the curve shape of bone filling graft. Then cooperate the characteristic of the rapid prototyping machine (Zcorp 402 3DP), solidify directly without mold, with the commercialized biochemistry bone graft material, it can directly accomplish bone filling graft in the light of patients' demand in the fist place. The forming structure of the rapid prototyping machine is the bone filling piled up by the stratification piling method; it's different from the hand-made pressure forming. According to the modification of the RP equipment, which the research is used, can be upgrade the solidification quality of bone graft material.

Research on Warpage of Polystyrene in Selective Laser Sintering

2010 ◽  
Vol 43 ◽  
pp. 578-582 ◽  
Author(s):  
C.Y. Wang ◽  
Q. Dong ◽  
X.X. Shen
Keyword(s):  
Layer Thickness ◽  
Process Parameters ◽  
Laser Power ◽  
Selective Laser Sintering ◽  
Scanning Speed ◽  
Laser Sintering ◽  
Main Process ◽  
Influence Of Process Parameters ◽  
Temperature Changes ◽  
Hatch Spacing

Warpage is a crucial factor to accuracy of sintering part in selective laser sintering (SLS) process. In this paper, The influence of process parameters on warpage when sintering polystyrene(PS) materials in SLS are investigated. The laser power, scanning speed, hatch spacing, layer thickness as well as temperature of powder are considered as the main process parameters. The results showed that warpage increases with the increase of hatch space. Contary to it, warpage decreases with the increase of laser power. Warpage decreases with the increase of layer thickness between 0.16~0.18mm and changes little with increase of the thickness. Warpage increases along with the increase of scanning speed but decreases when the speed is over about 2000mm/s. When the temperature changes between 82°C-86°C, warpage decreases little with the increase of temperature. But further increase of temperature leads to warpage decreasing sharply when the temperature changes between 86°C-90°C.

scholarly journals Online Monitoring Based on Temperature Field Features and Prediction Model for Selective Laser Sintering Process

2018 ◽  
Vol 8 (12) ◽  
pp. 2383 ◽  
Author(s):  
Zhehan Chen ◽  
Xianhui Zong ◽  
Jing Shi ◽  
Xiaohua Zhang
Keyword(s):  
Temperature Field ◽  
Prediction Model ◽  
Selective Laser Sintering ◽  
Principal Component ◽  
Laser Sintering ◽  
Support Vector ◽  
Sintering Process ◽  
Metal Materials ◽  
Key Features ◽  
The Mathematical Model

Selective laser sintering (SLS) is an additive manufacturing technology that can work with a variety of metal materials, and has been widely employed in many applications. The establishment of a data correlation model through the analysis of temperature field images is a recognized research method to realize the monitoring and quality control of the SLS process. In this paper, the key features of the temperature field in the process are extracted from three levels, and the mathematical model and data structure of the key features are constructed. Feature extraction, dimensional reduction, and parameter optimization are realized based on principal component analysis (PCA) and support vector machine (SVM), and the prediction model is built and optimized. Finally, the feasibility of the proposed algorithms and model is verified by experiments.

Temperature field distribution in polymer particles during surface-selective laser sintering

Laser Physics ◽  
2020 ◽  
Vol 30 (5) ◽  
pp. 055601
Author(s):  
E N Antonov ◽  
A G Dunaev ◽  
A N Konovalov ◽  
S A Minaeva ◽  
V K Popov
Keyword(s):  
Temperature Field ◽  
Field Distribution ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Polymer Particles ◽  
Temperature Field Distribution

scholarly journals Selective Laser Sintering of PA6: Effect of Powder Recoating on Fibre Orientation

2020 ◽  
Vol 4 (3) ◽  
pp. 108
Author(s):  
Tobias Heckner ◽  
Michael Seitz ◽  
Sven Robert Raisch ◽  
Gerrit Huelder ◽  
Peter Middendorf
Keyword(s):  
Computed Tomography ◽  
Mechanical Properties ◽  
Layer Thickness ◽  
Laser Power ◽  
Laser Energy ◽  
Fibre Orientation ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Shear Stresses ◽  
Imaging Results

In Selective Laser Sintering, fibres are strongly orientated during the powder recoating process. This effect leads to an additional increase of anisotropy in the final printed parts. This study investigates the influence of process parameter variation on the mechanical properties and the fibre orientation. A full factorial design of experiment was created to evaluate the processing parameters of recoating speed, layer thickness and laser power on the part’s modulus of elasticity. Based on the mechanical testing, computed tomography was applied to selected samples to investigate the process-induced fibre microstructure, and calculate the fibre orientation tensors. The results show increasing part stiffness in the deposition direction, with decreasing layer thickness and increasing laser power, while the recoating speed only shows little effect on the mechanical performance. This complies with computed tomography imaging results, which show an increase in fibre orientation with smaller layer thickness. With thinner layers, and hence smaller shear gaps, shear stresses induced by the roller during recoating increase significantly, leading to excessive fibre reorientation and alignment. The high level of fibre alignment implies an increase of strength and stiffness in the recoating direction. In addition, thinner layer thickness under constant laser energy density results in improved melting behaviour, and thus improved fibre consolidation, consequently further increasing the mechanical properties. Meanwhile, the parameters of recoating speed and laser power do not have a significant impact on fibre orientation within their applicable process windows.

scholarly journals Modeling and simulation of the temperature field of selective laser sintering

2021 ◽  
Vol 1885 (3) ◽  
pp. 032073
Author(s):  
Qiyang He ◽  
Xiaohui Ao ◽  
Huanxiong Xia ◽  
Jianhua Liu ◽  
Chun Yang ◽  
...  
Keyword(s):  
Temperature Field ◽  
Modeling And Simulation ◽  
Selective Laser Sintering ◽  
Laser Sintering
Sign in / Sign up

Export Citation Format

Share Document