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DING Zhi-yong, PENG Bo, WANG Zhen-jun. Computation model of bridging stress for flexible short fiber in asphalt at low temperature[J]. Journal of Traffic and Transportation Engineering, 2011, 11(5): 6-11. doi: 10.19818/j.cnki.1671-1637.2011.05.002
Citation: DING Zhi-yong, PENG Bo, WANG Zhen-jun. Computation model of bridging stress for flexible short fiber in asphalt at low temperature[J]. Journal of Traffic and Transportation Engineering, 2011, 11(5): 6-11. doi: 10.19818/j.cnki.1671-1637.2011.05.002
shu

Computation model of bridging stress for flexible short fiber in asphalt at low temperature

doi: 10.19818/j.cnki.1671-1637.2011.05.002
  • 1.

    Key Laboratory for Highway Construction Technology and Equipment of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China

  • 3.

    School of Materials Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China

More Information
  • Author Bio:

    DING Zhi-yong(1977-), male, lecturer, PhD, + 86-29-62630078, dzy@chd.edu.cn

  • Received Date: 2011-05-18
  • Publish Date: 2011-10-25
    Abstract
  • The characteristics of flexible-fiber-reinforced brittle materials were analyzed, and a mechanical model of single fiber pulled out from asphalt at low temperature was established.In spherical coordinate, a computation model of bridging stress for short fiber was established when short fibers uniformly distributed in asphalt, and the bridging stress was computed when asphalt ruptured.The bridging stress was measured by using tensile test and large size fiber asphalt samples at low temperature.The calculation model was corrected by fitting calculated and measured values of bridging stress.Analysis result shows that the maximal fitting error is 6.67%, so, the mechanics-experience method can be used to study the bridging stress of flexible short fiber at low temperature.

     

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