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林业科学 ›› 2017, Vol. 53 ›› Issue (4): 129-138.doi: 10.11707/j.1001-7488.20170415

• 论文与研究报告 • 上一篇    下一篇

微米木纤维医用颈椎夹板的力学性能及有限元分析

张杨, 马岩   

  1. 东北林业大学林业与木工机械工程技术中心 哈尔滨 150040
  • 收稿日期:2016-04-15 修回日期:2016-07-13 出版日期:2017-04-25 发布日期:2017-05-26
  • 基金资助:
    Natural Science Foundation Project of Heilongjiang Province (C201413).

Mechanical Properties and Finite Element Analysis on Medical Neck Collar Made of Micron Wood Fiber

Zhang Yang, Ma Yan   

  1. Forestry and Woodworking Machinery Engineering Centre, Northeast Forestry University Harbin 150040
  • Received:2016-04-15 Revised:2016-07-13 Online:2017-04-25 Published:2017-05-26
  • Supported by:
    Natural Science Foundation Project of Heilongjiang Province (C201413).

摘要: [目的] 研究微米木纤维医用颈椎夹板的力学性能,模拟颈椎夹板受到外力时的力学数值,分析其是否可以满足人体使用强度要求。[内容] 选择直径为16 μm的红松木纤维制备试验试样,对木纤维板进行三点弯曲力学性能测试,并运用扫描电镜(SEM)对其微观结构进行表征。利用ABAQUS程序对微米木纤维颈锥夹板进行压缩和冲击性能的模拟,并对其模拟结果进行分析。[结果] 微米木纤维颈锥夹板沿上颈长度对应曲面由内向外压缩,后片的承载能力略高于前片;沿侧曲面由外向内压缩的抗压能力高于沿上颈长度对应曲面由内向外压缩的抗压能力。通过选用不同的冲击能量研究微米木纤维颈锥夹板在低速冲击作用下的损伤程度,冲击损伤随着冲击能量的增大而增大。[结论] 颈锥夹板的有限元力学性能数值模拟与实际三点弯曲力学试验数值接近,说明试验的合理性。夹板最大可承受30 MPa的应力,可满足人体使用强度要求。

关键词: 微米木纤维, 颈托, 有限元, 力学性能

Abstract: [Objective] This paper investigated the mechanical properties of neck collar made of micron wood fiber and stimulated the numerical values of the neck collar under the load by external force, and analyzed the numerical values to determine if the neck collar can meet the strength requirement when it applied on human body.[Method] The Pinus koraiensis wood fiber with the diameter of 16 μm was used to prepare the test specimen in this paper. The three-point bending mechanical tests were applied on this micron wood fiberboard, its microstructure was characterized by scanning electron microscopy (SEM). ABAQUS program was used to simulate the compression and impact property of micron wood fiber neck collar and analyzed the simulation result.[Result] The results showed that micron wood fiber neck collar from inside to the outside along the curved surface corresponding to the upper neck length, and bearing capacity of back neck collar was slightly higher than that of front neck collar. Anti-pressure capacity of the micron wood fiber neck collar's compression from outside to the inside along side curved surface was higher than that of compression from inside to the outside along the curved surface corresponding to the upper neck length. Damage degree of micron wood fiber neck collar under low velocity impact was studied by applying different impact energies to the sample, the results revealed that the impact damage increased with the increasing of impact energy.[Conclusion] The value of mechanical properties in neck collar determined by finite element stimulation was similar to that by three-point bending test, indicating the rationality of the experiment. The maximum bear stress of the neck collar was 30 MPa and met the requirements on human body.

Key words: micron wood fiber, neck collar, finite element, mechanics property

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