基于剪切形变测试的材料流变建模与预测分析
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摘要
开发了一种材料流变模型建立与预测分析仪。该流变仪通过测试恒定剪切应力作用下的材料形变特性,可自动建立材料的流变模型,并可依据模型导出的流变方程预测分析材料在不同应力或应变条件下的流变特性。介绍了该流变仪的工作原理、硬件组成、模型建立与预测分析过程,并以SBS改性沥青为应用实例,通过剪切形变特性的测试,建立了SBS改性沥青在40℃下的流变模型,确定了其流变方程和流变参数,预测分析了在车轮交变应力作用下该材料的形变规律,结果表明车速从40km/h增大到80km/h,粘性变形可减小52%,有利于抑制路面车辙的形成。
A rheometer used for the establishment of rheological model and prediction analysis was developed.The rheological model of the material could be automatically established based on the rheological property test at constant shear stress,and the rheological properties of the material at different stresses or under different strain conditions can be predicted according to the rheological equations derived from the model.In this paper,the working principle,hardware compositions,model establishment and prediction analysis of the rheometer were introduced.Here,SBS modified bitumen was selected as a practical example.The rheological model of SBS modified bitumen under 40℃ was established and the rheological equation and rheological parameter were determined by shear deformation test.The deformation laws of SBS modified bitumen at alternating stress of the wheel were predicted and analyzed.The experimental results indicate that the viscous deformation decreases 52% with the speed increases from 40 km/h to 80 km/h,which is good for inhibiting the formation of pavement rutting.
A rheometer used for the establishment of rheological model and prediction analysis was developed.The rheological model of the material could be automatically established based on the rheological property test at constant shear stress,and the rheological properties of the material at different stresses or under different strain conditions can be predicted according to the rheological equations derived from the model.In this paper,the working principle,hardware compositions,model establishment and prediction analysis of the rheometer were introduced.Here,SBS modified bitumen was selected as a practical example.The rheological model of SBS modified bitumen under 40℃ was established and the rheological equation and rheological parameter were determined by shear deformation test.The deformation laws of SBS modified bitumen at alternating stress of the wheel were predicted and analyzed.The experimental results indicate that the viscous deformation decreases 52% with the speed increases from 40 km/h to 80 km/h,which is good for inhibiting the formation of pavement rutting.
引文
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[2]Liu C,Zhou F,Kang J,et al.Application of a Non-linear Viscoelastic-plastic Rheological Model of Soft Coal on Borehole Stability[J].Journal of Natural Gas Science&Engineering,2016,36:1303-1311.
[3]黄梦.毛细管流变仪[J].橡塑机械时代,2007(2):38-38.
[4]陈飞跃.用旋转流变仪测量聚合物的流变性能[J].现代塑料,2008,(4):54-55.
[5]Link R E,Shenoy A,Link R E.Fatigue Testing and Evaluation of Asphalt Binders Using the Dynamic Shear Rheometer[J].Journal of Testing&Evaluation,2002,30(4):303-312.
[6]王启宏.材料流变学[M].北京:中国建筑工业出版社,1987.
[7]Weigel S,Stephan D.Modelling of Rheological and Ageing Properties of Bitumen Based on its Chemical Structure[J].Materials&Structures,2017,50:83-98.
[8]Hayat T,Nadeem S,Asghar S.Periodic Unidirectional Flows of a Viscoelastic Fluid with the Fractional Maxwell Model[J].Applied Mathematics&Computation,2004,151(1):153-161.
[9]肖建华.由可伸张分子列变形决定的流变弹性[C]//中国化学会、中国力学学会全国流变学学术会议.长沙:[s.n.],2008,2:17-21.
[10]王启宏,徐昭东.关于混凝土流变模型的研究[J].武汉理工大学学报,1980,2(2):57-61.
[11]余剑英,曹志龙,薛理辉,等.一种材料流变模型分析仪及建立材料流变模型的方法:中国专利.CN105910958A[P].2016-08-31
[12]Li T,Hu X G,Yu L,et al.Sectioned Linear Fitting Method of Parameters for Asphalt Mastics Viscoelastic Burgers model[J].Journal of Traffic&Transportation Engineering,2007,7(3):66-69.
[13]易大义,沈云宝,李有法.计算方法[M].2版.杭州:浙江大学出版社,2002.
[14]孙文瑜,徐成贤,朱德通.最优化方法[M].北京:高等教育出版社,2005.
[15]Huang Y H.Pavement Analysis and Design[J].Deflection,1993(3):50-58.
[16]黄晓明.高速公路沥青路面设计理论与方法[M].北京:人民交通出版社,2006.
[17]汪凡.基于流变学本构模型和动力有限元分析的沥青路面车辙计算[D].重庆:重庆交通大学,2009.
[18]顾国芳,浦鸿汀.聚合物流变学基础[M].上海:同济大学出版社,2000.