Spiral cracking pattern in asphalt materials

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• 作者：Behzad Behnia^a ; ^{behzad.behnia@wne.edu} ; William G. Buttlar^b ; ^{buttlarw@missouri.edu} ; Henrique Reis^c ; ^{h-reis@illinois.edu}
• 关键词：Asphalt materials ; Spiral cracking pattern ; Acoustic emission test ; Compact tension test ; Embrittlement temperature ; Spiral tightness parameter
• 刊名：Materials & Design
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：116
• 期：Complete
• 页码：609-615
• 全文大小：1937 K
• 卷排序：116

文摘

3D spiral-shaped fracture pattern was discovered in a biaxially stressed layer of asphalt material bonded to aluminum substrate. A logarithmic spiral model was selected to mathematically represent three-dimensional spiral cracks. The spiral tightness parameter, “b”, was used in characterization of spiral cracks in different asphalt materials. Shape of spiral cracks was independent of thickness and shape of samples and influenced by fracture properties of asphalt materials. The embrittlement temperatures and fracture energies of asphalt materials were consistent with corresponding characteristic parameters of spiral cracks.