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颗粒材料双轴试验离散元数值模拟

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Keywords: 路面材料,颗粒材料,力学参数,双轴试验,离散元方法

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Abstract:

为了得到颗粒材料的力学参数与试验条件之间的关系,选取5组粒径范围的颗粒材料,利用离散元方法生成初始试件,并数值模拟了其双轴试验,分析了不同围压对材料弹性模量和强度的影响,以及不同加载速率下材料的弹性模量、泊松比和强度的变化规律。提取了围压为10MPa与加载速率为0.03m?s-1时5组试件的应力-应变曲线,从微观角度给出了荷载作用后试件中的裂缝分布。模拟结果表明随着围压的增大,5组试件的弹性模量和强度增大,增长趋势相对平缓,但粒径为9.50~13.20mm的试件出现较大波动;加载速率与弹性模量、泊松比、强度和裂缝初始应力基本呈二次多项式关系,最小判定系数为0.9009,最大为0.9959;在5组试件中,随着粒径的增大,由应力-应变曲线得到的应力峰值减小。

References

[1]  DU Shun-cheng, DAI Jing-liang. Multilevel anti-shear grading design method based on theory of granular material mechanics[J]. China Journal of Highway and Transport, 2008, 21(1): 35-39.(in Chinese)
[2]  KIM J, WEST R C. Application of the viscoelastic continuum damage model to the indirect tension test at a single tempera-ture[J]. Journal of Engineering Mechanics, 2010, 136(4): 496-505.
[3]  FROST J D, EVANS T M. Membrane effects in biaxial compression tests[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2009, 135(7): 986-991.
[4]  TEUNISSEN J A M. Shear band analysis in the biaxial test[J]. International Journal of Geomechanics, 2008, 8(5): 311-321.
[5]  CEDOLIN L, MULAS M G. Biaxial stress-strain relation for concrete[J]. Journal of Engineering Mechanics, 1984, 110(2): 187-206.
[6]  JIANG Ming-jing, LI Xiu-mei, SUN Yu-gang, et al. Discrete element simulation of biaxial compression test considering rolling resistance[J]. Rock and Soil Mechanics, 2009, 30(S2): 514-517.(in Chinese)
[7]  ZHANG Chong, SHU Gan-ping. Effect of particle shape on biaxial tests simulated by particle flow code[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(8): 1281-1286.(in Chinese)
[8]  ZHOU Jian, CHI Yu-wei, CHI Yong, et al. Simulation of biaxial test on sand by particle flow code[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(6): 701-704.(in Chinese)
[9]  YE Yong, XU Xi-peng. Study on distinct element modeling method of rock-like brittleness material[J]. Journal of Zhengzhou University of Light Industry: Natural Science, 2008, 23(5): 62-66.(in Chinese)
[10]  LU Pei-yin. Experimental study on dynamic strength and deformation of concrete under uniaxial and biaxial action[D]. Dalian: Dalian University of Technology, 2001.(in Chinese)

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