基于蠕变试验的人体牙周膜黏弹性力学行为研究
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国家自然科学基金(81571005,51305208);东南大学?南京医科大学合作基金(2242017K3DN02)


Research on viscoelastic mechanical behavior of human periodontal ligament based on creep tests
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    摘要:

    目的:研究人牙周膜黏弹性力学行为,通过蠕变试验获取相关数据,构建三参数黏弹性本构模型并求取模型参数。方法:取4例人体牙槽骨-牙周膜-牙齿复合体制作水平切片样本,使用动态热机械分析仪对其进行蠕变试验,获得与时间相关的试验数据,再基于连续介质力学构造三参数Zener模型,并对试验数据进行拟合获得模型的具体特征参数。结果:4例样本拟合曲线趋势一致,校正决定系数均在0.95以上,拟合程度最高的1例样本达0.986 54,且残差平方和都较小。结论:Zener模型能够用于描述人体牙周膜黏弹性力学行为中的蠕变特性。

    Abstract:

    Objective:To investigate the viscoelastic mechanical behavior of human periodontal ligament(PDL),obtain relevant data through creep test,construct a three-parameter viscoelastic constitutive model and obtain model parameters. Methods:Four human bone-PDL-tooth complex was cut to make the transverse samples. A dynamic thermomechanical analyzer was used to perform creep tests,and time-dependent test data were obtained. The three-parameter Zener model was constructed based on continuous medium mechanics,and the experimental data were fitted to obtain the specific characteristic parameters of the model. Results:The curves of the four samples were consistent,the correction coefficients are all above 0.95,the highest fitting sample is 0.986 54,and the residual sum of squares are all small. Conclusion:It is proved that the Zener model can be used to describe the creep characteristics in the viscoelastic mechanical behavior of human PDL.

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吴 斌,鹿如鑫,赵思雨,谢理哲,严 斌,黄辉祥,汤文成,杨 宇.基于蠕变试验的人体牙周膜黏弹性力学行为研究[J].南京医科大学学报(自然科学版),2018,(12):1766-1770

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  • 收稿日期:2018-04-23
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  • 在线发布日期: 2019-01-02
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