Al-Sayed Safwan, Wang Xi, Peng Yijiang
The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China.
Materials (Basel). 2023 Jul 27;16(15):5283. doi: 10.3390/ma16155283.
The relationship between the macroscopic mechanical properties of lightweight aggregate concrete and its microstructure is a hot topic in the discipline of concrete materials. It is very meaningful to provide an efficient numerical analysis method to conduct a meso-level analysis. This study proposes an automatic dissection algorithm and adapts the calculation program of the base force element method to conduct a non-linear damage analysis. In the numerical simulation, three groups of 100 mm × 100 mm × 100 mm specimens were selected for the uniaxial compression experiment and uniaxial tensile experiment, respectively. The average tensile strength of the numerical simulation for the uniaxial compression test was 21.86 MPa. The stress-strain softening curve, stress contour plot, strain contour plot, and damage plot of the light aggregate concrete were also analyzed. These research results provide data for analyzing the failure mechanism of light aggregate concrete and reveal the failure mechanism of light aggregate concrete. At the same time, the reliability of the proposed algorithm is verified. Our aim is to provide a more efficient and accurate analysis of meso-damage in lightweight aggregate concrete, which benefits industries involved in production, construction, and structural engineering.
轻骨料混凝土的宏观力学性能与其微观结构之间的关系是混凝土材料学科中的一个热门话题。提供一种高效的数值分析方法来进行细观层面的分析具有重要意义。本研究提出了一种自动剖分算法，并采用基于力的单元法计算程序进行非线性损伤分析。在数值模拟中，分别选取三组100mm×100mm×100mm的试件进行单轴压缩试验和单轴拉伸试验。单轴压缩试验数值模拟的平均抗拉强度为21.86MPa。还分析了轻骨料混凝土的应力-应变软化曲线、应力等值线图、应变等值线图和损伤图。这些研究结果为分析轻骨料混凝土的破坏机理提供了数据，揭示了轻骨料混凝土的破坏机理。同时，验证了所提算法的可靠性。我们的目标是为轻骨料混凝土细观损伤提供更高效、准确的分析，这将惠及生产、建筑和结构工程等行业。
