A novel genetic expression programming assisted calibration strategy for discrete element models of composite joints with ductile adhesives
A novel genetic expression programming assisted calibration strategy for discrete element models of composite joints with ductile adhesives
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DOI：
10.1016/j.tws.2022.109985
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发表时间：
2022-11
影响因子：
6.4
通讯作者：
Xing-er Wang;Armin Yousefi Kanani;Kai Pang;Jian Yang-;Jianqiao Ye;X. Hou
中科院分区：
文献类型：
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作者：
Xing-er Wang;Armin Yousefi Kanani;Kai Pang;Jian Yang-;Jianqiao Ye;X. Hou
离散元模型在模拟复合材料胶接接头的微观结构行为方面具有很大的可行性。然而，它需要一个复杂的校准过程，以确定微尺度键参数，这涉及大量的努力，在实验和数值研究。这项工作开发了一种新的校准策略的基础上DE模型和遗传表达式编程（GEP）的方法来预测的混合复合材料接头的行为，包括材料的非线性，大的延性变形和多种断裂模式。在所开发的策略中，韧性粘合剂的体积和层间性质都被关注以适应各种接头配置。基于虚拟DE实验的数据集进行GEP建模。随后开发了符号回归模型以便于参数确定。通过一系列室内试验验证了数值计算结果的正确性。结果表明，修正后的DE模型能较好地模拟不同结构形式的延性胶接接头和复合材料接头的特性。因此，可以建议将所开发的策略推广到其他DE模型的开发中，以节省微观结构参数校准过程中的大量工作。
Discrete element (DE) model has a great feasibility in modelling the microstructural behaviours of adhesive composite joints. However, it demands a sophisticated calibration process to determine microscale bond parameters, which involves massive efforts in both experimental and numerical investigations. This work developed a novel calibration strategy based on DE models and genetic expression programming (GEP) approach for predicting the behaviours of hybrid composite joints encompassing the material nonlinearity, large ductile deformation and multiple fracture modes. In the developed strategy, both the bulk and interlaminar-like properties of ductile adhesives were concerned to suit various joint configurations. GEP modelling was performed based on the datasets from virtual DE experiments. Symbolic regression models were subsequently developed to facilitate the parameters determination. A series lab tests were conducted to validate the numerical results. It shows that the calibrated DE model can adaptively simulate the featured behaviours of both the ductile adhesive and composite joints with different configurations well in most examined occasions. Therefore, it could be suggested to generalize the developed strategy in the development of other DE models for saving the massive efforts in the calibration process of microstructural parameters.