Bermudo Carolina, Sevilla Lorenzo, Martín Francisco, Trujillo Francisco Javier
Civil, Material and Manufacturing Engineering Department, ETSII-EPS, University of Malaga, Málaga 29071, Spain.
Materials (Basel). 2017 May 19;10(5):556. doi: 10.3390/ma10050556.
The application of incremental processes in the manufacturing industry is having a great development in recent years. The first stage of an Incremental Forming Process can be defined as an indentation. Because of this, the indentation process is starting to be widely studied, not only as a hardening test but also as a forming process. Thus, in this work, an analysis of the indentation process under the new Modular Upper Bound perspective has been performed. The modular implementation has several advantages, including the possibility of the introduction of different parameters to extend the study, such as the friction effect, the temperature or the hardening effect studied in this paper. The main objective of the present work is to analyze the three hardening models developed depending on the material characteristics. In order to support the validation of the hardening models, finite element analyses of diverse materials under an indentation are carried out. Results obtained from the Modular Upper Bound are in concordance with the results obtained from the numerical analyses. In addition, the numerical and analytical methods are in concordance with the results previously obtained in the experimental indentation of annealed aluminum A92030. Due to the introduction of the hardening factor, the new modular distribution is a suitable option for the analysis of indentation process.
近年来，增量工艺在制造业中的应用得到了极大的发展。增量成形工艺的第一阶段可定义为压痕。因此，压痕工艺不仅作为一种硬化测试，而且作为一种成形工艺，开始受到广泛研究。因此，在这项工作中，从新的模块化上限视角对压痕工艺进行了分析。模块化实现有几个优点，包括可以引入不同参数来扩展研究，如本文研究的摩擦效应、温度或硬化效应。本工作的主要目的是分析根据材料特性开发的三种硬化模型。为了支持硬化模型的验证，对不同材料在压痕下进行了有限元分析。从模块化上限获得的结果与数值分析获得的结果一致。此外，数值和分析方法与先前在退火铝A92030的实验压痕中获得的结果一致。由于引入了硬化因子，新的模块化分布是分析压痕工艺的合适选择。
