Development of an Adherence Energy Test via Force-Displacement Atomic Force Microscopy (FD-AFM)
Development of an Adherence Energy Test via Force-Displacement Atomic Force Microscopy (FD-AFM)
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DOI：
10.1007/978-94-007-6878-9_20
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
T. Pauli;W. Grimes;Meng Wang;P. Lu;Shin-Che Huang
中科院分区：
文献类型：
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作者：
T. Pauli;W. Grimes;Meng Wang;P. Lu;Shin-Che Huang
在科学和工程研究方面已经取得了重大进展，以了解沥青结合料的材料组成和力学性能对与路面断裂相关的损伤和自愈行为的影响。众所周知，粘弹性材料在断裂能方面往往表现出速率和温度相关的行为。作为这一类材料的代表，沥青粘结剂的率相关断裂是可以预见的。报道了一项使用原子力显微镜(AFM)技术进行的研究的初步结果，该技术旨在确定速率相关性是否是沥青薄膜微尺度粘性断裂的一个因素。这项技术包括通过以不同的速率对接触施加直接拉力来创建然后断裂沥青和玻璃之间的标准化粘合接触。将标准触点断裂所需的功作为温度和分离率的函数进行测量和记录。研究结果表明，沥青断裂能确实是速率和温度相关的。研究还表明，来自不同原油来源的沥青表现出不同的断裂率(和温度)相关性。
Significant progress has been made in regard to scientific and engineering investigations to understand the influence of material composition and mechanical properties of bituminous binder on damage and self-healing behavior associated with pavement fracture. It is well known that visco-elastic materials tend to exhibit rate and temperature dependant behavior in terms of fracture energy. As a representative of this class of materials, rate-dependant fracture should be expected for bituminous binders. Preliminary results are reported regarding a study using an atomic force microscopy (AFM) technique developed to determine if rate dependence is a factor in micro-scale adhesive fracture of bitumen thin-films. The technique involves creating then fracturing a standardized adhesive contact between bitumen and glass by application of a direct tensile force to the contact at various rates. The work required to fracture the standard contact is measured and recorded as a function of temperature and separation rate. The results of this study show that bitumen fracture energy is indeed rate and temperature dependant. The study also shows that bitumen derived from different crude sources exhibit differing fracture rate (and temperature) dependencies.