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The Creep Experiment and Research of Small Asphalt Concrete Beam and ANSYS Analysis

Author: MengQingLong
Tutor: LiuHanBing
School: Jilin University
Course: Road and Railway Engineering
Keywords: Creep Viscoelastic NU - 10 Finite Element Analysis
CLC: U418.6
Type: Master's thesis
Year: 2005
Downloads: 770
Quote: 4
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Abstract


Asphalt is a typical visco - elastic material , the low-temperature cracking and high temperature passage of the destruction of the asphalt pavement in the form , serious damage to the road use performance, shorten the service life . Not yet seen the universally recognized asphalt high and low temperature performance evaluation methods, based on empirical method semi-theoretical or semi-empirical method . Asphalt concrete creep widespread mechanical properties of creep properties of asphalt , with the development of the theory of viscoelasticity countries asphalt concrete creep more and more attention to the study of creep phenomenon increasingly the deeper the creep performance as an evaluation of asphalt mixtures , an important indicator of low temperature performance , is increasingly becoming the focus of the study of scholars from various countries . According to the constitutive relation of viscoelastic theory and viscoelastic materials , starting from the bending creep test of asphalt concrete trabecular use of NU - 10 pneumatic multi-function experiments , the asphalt concrete trabecular at -10 ℃ constant load bending creep experiment . Through numerical analysis , ANSYS simulation , the viscoelastic properties of the asphalt mixture , verify the viscoelastic constitutive relation theory , the AC - 16 , SMA - 16 strain curves of the two materials , the stiffness modulus curve , creep change the compliance curve and -10 ° C. the creep rate . To study the mechanical properties of asphalt mixtures , the evaluation of asphalt mixture creep rate , low temperature performance provides some meaningful data provides some basis for pavement design . And prove through the rational choice theory formula accurately determine the the formula coefficient , using state-of-the-art ANSYS software can simulate the viscoelastic behavior of the asphalt concrete trabecular , in order to achieve the height of the nonlinear elastic , plastic , creep , viscoelastic simulation .

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