用螺旋裂纹模式对软粘合材料的断裂特征进行新的方法
Behzad Behnia1, Matthew Lukaszewski2
1Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699, USA.
Materials (Basel, Switzerland)
|December 9, 2023
概括
这项研究引入了一种使用螺旋裂来分析青粘合剂断裂的新方法. 螺旋裂变能量 (E) 与断裂能量有很强的相关性,为材料性能提供了洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 聚合物科学 聚合物科学
背景情况:
- 软粘合材料,如青粘合剂,需要强大的断裂特征.
- 了解压力下的材料行为对于基础设施的耐用性至关重要.
- 传统方法可能无法完全捕捉聚合物材料中复杂的断裂机制.
研究的目的:
- 提出一种新的方法,用于使用螺旋裂纹模式的软粘合剂的断裂特征.
- 为了研究十种不同的青粘合材料的断裂行为.
- 建立螺旋裂纹参数与已确定的骨折指标之间的关系.
主要方法:
- 一个集成的实验计算框架,结合了声辐射 (AE) 和基于机器学习的数字图像分析 (DIA).
- 在圆柱形的青样本中利用受控冷却 (-1°C/分钟) 诱导的螺旋裂纹模式.
- 采用卷积神经网络 (CNN) 和回归用于自动螺旋模式分析,并引入了螺旋裂纹能量 (E).
主要成果:
- 在螺旋裂变能量 (E) 和青材料的断裂能量 (Gf) 之间发现了强烈的正相关性.
- 螺旋密度参数 (b) 和碎裂温度 (T) 与 E 和 Gf 有负相关性.
- 使用AE方法有效地测量了碎裂温度 (T).
结论:
- 拟议的螺旋裂纹方法,加上AE和DIA,提供了一种精确的方法来表征软粘合剂骨折.
- 螺旋裂变能量 (E) 是青粘合剂中断裂性能的可靠指标.
- 这项研究强调了螺旋紧密度,裂能量,断裂能量和脆化温度之间的相互作用.
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