| 沥青混合料粘弹塑性断裂参数研究 |
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| 引用本文： | 刘敬辉;王端宜. 沥青混合料粘弹塑性断裂参数研究[J]. 华南理工大学学报(自然科学版), 2009, 37(11) |
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| 作者姓名： | 刘敬辉 王端宜 |
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| 作者单位： | 三峡大学土木水电学院;华南理工大学交通学院 |
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| 摘 要： | 沥青混合料是一种典型的粘弹塑性材料,通过半圆弯拉试验,采用J积分和延迟开裂时间评价其延迟开裂性能;测得在不同荷载水平和不同试验温度条件下沥青混合料的延迟开裂时间以及不同试验温度下的断裂韧度,研究其裂缝起裂规律。研究结果表明,裂缝的起裂表现出明显的粘弹塑性特征,采用J积分理论和延迟开裂时间评价沥青混合料的断裂性能时,简单的流变本构关系依然适用。
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| 关 键 词： | J积分 沥青混合料 半圆弯拉试验 断裂韧度 延迟开裂 |
| 收稿时间： | 2008-12-25 |
| 修稿时间： | 2009-03-23 |
Experimental Research on Viscoelastic-plastic Fracture Parameters of Asphalt Mixture |
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| Abstract: | Asphalt mixture is a typical viscoelastic-plastic material. Based on the semi-circular bending test, the delayed crack characterization is appreciated by J-integral theory and delayed-crack initiation time. The delayed-crack initiation time and fracture toughness are measured under different loading and different testing temperature, the crack initiation regularities are investigated. The experimental results show that the crack initiation displayed obvious viscoelastic-plastic character, the simple rheological constitutive model is also applicable for the asphalt mixture when evaluating the fracture performance by J-integral theory and delayed-crack initiation time. |
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| Keywords: | J-integral Asphalt mixture Semi-circular bending test Fracture toughness Delayed crack |
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