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Application of ultrasonic method in asphalt concrete testing for fatigue life estimation

机译:超声波法在疲劳寿命估计中的沥青混凝土试验中的应用

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摘要

This paper presents the possibilities of applying ultrasonic methods in asphalt concrete specimen testing in order to estimate fatigue life using ultrasonic characteristics of specimens. The procedures and results of testing cylinder shaped samples of both ultrasonic analysis and fatigue life testing are described. The ultrasonic method was first used in order to obtain the seismic characteristics of specimens. Then, the specimens were tested for fatigue lives using the repeated-loading indirect tensile test equipment (SDU-Asphalt Tester). To be able to model the fatigue lives, in addition to conventional fatigue model parameters new parameters from this ultrasonic analysis were taken into consideration. These additional parameters are acquired from the seismic measurements. Hence, only by examining the ultrasonic method, it will be possible to predict the fatigue lives of the specimens non-destructively.
机译:本文介绍了在沥青混凝土试样测试中应用超声波方法的可能性,以便使用样品超声特性估算疲劳寿命。描述了超声分析和疲劳寿命测试的测试气缸形样品的程序和结果。超声波方法首先使用,以获得样品的地震特征。然后,使用重复加载间接拉伸试验设备(SDU-沥青测试仪)测试试样进行疲劳寿命。为了能够模拟疲劳生活,除了传统的疲劳模型参数,考虑来自该超声波分析的新参数。从地震测量中获取这些附加参数。因此,只有通过检查超声波方法,可以预测原样的疲劳寿命。

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