|Table of Contents|

Numerical simulation of indirect tensile test for asphalt mixture

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2010年05期
Page:
6-10
Research Field:
Publishing date:
2010-10-20

Info

Title:
Numerical simulation of indirect tensile test for asphalt mixture
Author(s):
PEI Jian-zhong;  CHANG Ming-feng;  CHEN Shuan-fa;  WANG Bing-gang
Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China
Keywords:
road engineering;  asphalt mixture;  indirect tensile test;  discrete element method;  numerical simulation
PACS:
U416.217
DOI:
-
Abstract:
To illustrate the dynamic response laws of Marshall specimen to load with indirect tensile test of asphalt mixture, the indirect tensile test of Marshall specimen was simulated by discrete element method(two dimension). The specimens with different diameters of particles were imposed to load using servo-control mechanism, the contact forces between particles, displacement vectors of particles and the number of cracks were given, and the splitting strengths were obtained. The responses of specimens were simulated numerically under different load rates, then the relationship between splitting strength and load rate was gotten. In addition, selecting a speci-men with one diameter of particles, the growth and development of cracks with time were analyzed to show the dynamic process of crack extension. The results indicate that the cracks mainly distribute on both sides of the diameter of specimen along load direction, the splitting strength increases as the diameter of particles increases and the maximum growth rate is 39.3%, the number of cracks decreases from 98 in specimens with the smallest diameter of particles to 6 in specimens with the largest diameter of particles, the relationship between load rate and splitting strength is logarithmic curve. 2 tabs, 8 figs, 12 refs.

References:

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Last Update: 2010-10-20