Proposal of Equivalent Porosity Indicator for Foam Aluminum Based on GRNN  

作　　者：Wenhao Da Lucai Wang Yanli Wang Xiaohong You Wenzhan Huang Fang Wang 

机构地区：[1]School of Material Science and Technology,Taiyuan University of Science and Technology,Taiyuan 030024,China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2024年第5期16-31,共16页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the Shanxi Provincial College Teaching Reform Innovation Funding Project(Grant No.201901d111270);the Natural Science Foundation of Shanxi Province(Grant No.201701d11127)。

摘　　要：To gain a more comprehensive understanding and evaluate foam aluminum's performance,researchers have introduced various characterization indicators.However,the current understanding of the significance of these indicators in analyzing foam aluminum's performance is limited.This study employs the Generalized Regression Neural Network(GRNN)method to establish a model that links foam aluminum's microstructure characterization data with its mechanical properties.Through the GRNN model,researchers extracted four of the most crucial features and their corresponding weight values from the 13 pore characteristics of foam aluminum.Subsequently,a new characterization formula,called“Wang equivalent porosity”(WEP),was developed by using residual weights assigned to the feature weights,and four parameter coefficients were obtained.This formula aims to represent the relationship between foam aluminum's microstructural features and its mechanical performance.Furthermore,the researchers conducted model verification using compression data from 11 sets of foam aluminum.The validation results showed that among these 11 foam aluminum datasets,the Gibson-Ashby formula yielded anomalous results in two cases,whereas WEP exhibited exceptional stability without any anomalies.In comparison to the Gibson-Ashby formula,WEP demonstrated an 18.18%improvement in evaluation accuracy.

关 键 词：aluminum foam characterization index importance analysis feature learning 

分 类 号：G146.21[文化科学] TG496[金属学及工艺—焊接]