Ben Said Lotfi, Hentati Hamdi, Wali Mondher, Ayadi Badreddine, Alhadri Muapper
Department of Mechanical Engineering, College of Engineering, University of Ha'il, Ha'il City 2440, Saudi Arabia.
Laboratory of Mechanics Modeling and Production, National Engineering School of Sfax, University of Sfax, Sfax 3038, Tunisia.
Polymers (Basel). 2024 Nov 26;16(23):3304. doi: 10.3390/polym16233304.
The prediction of crack patterns is one of the main tasks in the field of fracture mechanics in order to prevent the total damage of various materials, particularly Methyl Methacrylate Polymer (PMMA). The few data in the literature underscores the need for additional experiments on PMMA to analyze the performance of the phase-field approach to predict crack trajectories. The main purpose of this study is to verify the accuracy of the phase-field approach with a staggered scheme, based on spectral decomposition, for predicting crack propagation in PMMA specimens by comparing it with the experimental results presented in this work. Based on the tensile test and SEM analysis, this material exhibits brittle behavior. The numerical approach considers cracks as diffuse damage rather than sharp discontinuities, enabling a more accurate representation of brittle fracture processes. Experimental determination of material properties is used in the development of the numerical model. The main aim of these experiments is to explore how variations in load and specific geometries influence fracture initiation and crack trajectory. Consequently, these experiments will establish a dataset to further validate numerical advancements.
裂纹模式的预测是断裂力学领域的主要任务之一，目的是防止各种材料，特别是聚甲基丙烯酸甲酯聚合物（PMMA）的完全损坏。文献中的少量数据突出表明需要对PMMA进行更多实验，以分析相场方法预测裂纹轨迹的性能。本研究的主要目的是通过将基于谱分解的交错格式相场方法与本工作中给出的实验结果进行比较，来验证其预测PMMA试件裂纹扩展的准确性。基于拉伸试验和扫描电子显微镜分析，这种材料表现出脆性。数值方法将裂纹视为弥散损伤而非尖锐的不连续性，从而能够更准确地表示脆性断裂过程。数值模型的开发使用了材料性能的实验测定。这些实验的主要目的是探索载荷和特定几何形状的变化如何影响断裂起始和裂纹轨迹。因此，这些实验将建立一个数据集，以进一步验证数值进展。
