一種光敏樹脂結構的力學性能

朱冬梅; 丁峰; 劉海平; 劉國勇

doi:10.13374/j.issn2095-9389.2019.04.012

一種光敏樹脂結構的力學性能

doi: 10.13374/j.issn2095-9389.2019.04.012

朱冬梅^1, ,,
丁峰¹,
劉海平^{2, 3},
劉國勇¹

1.
北京科技大學機械工程學院，北京 100083
2.
北京空間飛行器總體設計部，北京 100094
3.
空間智能機器人系統技術與應用北京市重點實驗室，北京 100094

基金項目:

國家留學基金委資助項目 201706465022

裝備預研重點實驗室基金 614220402011704

詳細信息

通訊作者:
朱冬梅, E-mail: zdm@ustb.edu.cn

中圖分類號: TG142.71
計量
- 文章訪問數: 1204
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- PDF下載量: 62
- 被引次數: 0
出版歷程
- 收稿日期: 2018-03-06
- 刊出日期: 2019-04-01

Mechanical properties of a photosensitive resin structure

1.
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
Beijing Inst.of Spacecraft System Eng., Beijing 100094, China
3.
Beijing Key Lab.of Intelligent Space Robotic Systems Technol.and Applications, Beijing 100094, China

More Information

Corresponding author: ZHU Dong-mei, E-mail: zdm@ustb.edu.cn

摘要

摘要: 新設計三維打印光敏樹脂結構，其主要用在減震隔震組合結構中作為阻尼元件.首先利用微機控制電子試驗機對其進行靜力加載試驗，得到靜載下載荷—位移特性曲線，并計算得到特定點處等效彈性模量，利用疲勞機進行動力加載試驗，得到結構件在從5 Hz到20 Hz不同頻率下滯回曲線，并計算出相應等效阻尼系數.基于有限元法，建立光敏樹脂結構有限元模型，并以和實驗相同的工況進行靜力學和動力學計算分析，并對試驗數據和數值計算結果進行對比，得到計算結果與實測結果吻合良好，從而驗證有限元模型的可行性.在此基礎上通過有限元計算方法，研究不同幾何參數縫隙寬度、內弧半徑、外弧半徑、厚度對光敏樹脂結構特定點等效彈性模量以及等效阻尼系數的影響.此結構受力時，縱向保持剛度輸出，維持小變形，橫向位移放大，具有良好的減振和抵抗變形的能力.
- 三維打印光敏樹脂 /
- 等效彈性模量 /
- 實驗 /
- 有限元 /
- 等效阻尼系數
Abstract: A 3D printing photosensitive resin structure has many advantages, such as good corrosion resistance, flexibility, low yield, and superior deformability; thus, it has been widely used in several fields.In this study, a new photosensitive resin structure was designed and built using 3D printing method.The new photosensitive resin structure is mainly used as a damping element in shockabsorbing and -isolating composite structures.First, load-displacement curves were obtained by compression experiments using the universal testing machine controlled via a microcomputer, and the equivalent elastic modulus of the specific points in the structure was calculated.Dynamic loading tests were conducted using the fatigue machine.Moreover, the hysteresis loops under different frequencies between 5 Hz and 20 Hz were obtained.The equivalent damping ratio was calculated on the basis of the hysteresis loops.The static and dynamic calculation models were built on the basis of the finite element method.After the calculations, the numerical results and the test data under the same conditions were compared.The numerical results agreed well with the test data, thereby verifying the feasibility of the finite element models.Furthermore, the influences of different geometric parameters, such as slot width, inner arc, outer arc, and thickness, on the equivalent elastic modulus of the specific location and equivalent damping ratio of photosensitive resin were investigated by the finite element method.When the 3D printing photosensitive resin structure is subjected to force, it maintains a stiffness output and small deformation along the longitudinal direction; however, the lateral displacement can be enlarged.The 3D printing photosensitive resin structure has a good capability to reduce vibration and resist deformation.The results provide references for the future research of the static and dynamic characteristics and engineering application of the 3D printing photosensitive resin structure.
- 3D printing photosensitive resin /
- equivalent elastic modulus /
- test /
- finite element /
- equivalent damping ratio

HTML全文

圖 1 光敏樹脂結構示意圖

Figure 1. Schematic of the photosensitive resin structure

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圖 2 光敏樹脂結構應變片位置

Figure 2. Position of the resistance strain chips

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圖 3 光敏樹脂結構實驗加載過程

Figure 3. Photo of the loading process

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圖 4 載荷—位移曲線

Figure 4. Load—displacement curves

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圖 5 光敏樹脂結構實驗件加載示意圖

Figure 5. Installation diagram

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圖 6 實驗現場加載圖

Figure 6. Image of the experimental process

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圖 7 不同頻率下的力—位移曲線

Figure 7. Hysteresis loops under different frequencies

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圖 8 不同頻率下等效阻尼系數

Figure 8. Equivalent damping ratio under different frequencies

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圖 9 光敏樹脂結構有限元模型.(a) 有限元模型; (b) 網格模型

Figure 9. Finite element model of the photosensitive resin structure: (a) finite element model; (b) mesh model

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圖 10 應力云圖

Figure 10. Stress cloud contour

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圖 11 靜力實驗與數值模擬對比

Figure 11. Comparison between test data and calculation results

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圖 12 不同頻率下實驗和仿真曲線.(a) 5 Hz; (b) 10 Hz; (c) 15 Hz; (d) 20 Hz

Figure 12. Hysteresis loops under different frequencies: (a) 5 Hz; (b) 10 Hz; (c) 15 Hz; (d) 20 Hz

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圖 13 等效阻尼系數實驗值和仿真值對比

Figure 13. Comparison of equivalent damping ratio

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圖 14 不同縫隙寬度下的等效彈性模量

Figure 14. Equivalent elastic modulus for different slot widths

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圖 15 不同內弧半徑下的等效彈性模量

Figure 15. Equivalent elastic modulus for different inner arcs

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圖 16 不同外弧下的等效彈性模量

Figure 16. Equivalent elastic modulus for different outer arcs

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圖 17 不同厚度下的等效彈性模量

Figure 17. Equivalent elastic modulus for different thicknesses

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圖 18 不同內弧10 Hz下的滯回曲線

Figure 18. Hysteresis curves at 10 Hz under different inner arcs

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圖 19 不同內弧10 Hz下的等效阻尼系數

Figure 19. Equivalent damping ratio at 10 Hz under different inner arcs

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圖 20 不同外弧10 Hz下的滯回曲線

Figure 20. Hysteresis curves at 10 Hz under different outer arcs

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圖 21 不同外弧10 Hz下的等效阻尼系數

Figure 21. Equivalent damping ratio at 10 Hz under different outer arcs

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圖 22 不同厚度10 Hz下的滯回曲線

Figure 22. Hysteresis curves at 10 Hz under different thicknesses

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圖 23 不同厚度10 Hz下的等效阻尼系數

Figure 23. Equivalent damping ratio at 10 Hz under different thicknesses

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