(1. 西安交通大學(xué) 機(jī)械工程學(xué)院 模具與先進(jìn)成形技術(shù)研究所，西安 710049；
2. 西安理工大學(xué) 機(jī)械與精密儀器工程學(xué)院，西安 710048)
摘 要: 為了獲得GTN-Hill1948細(xì)觀損傷模型中的參數(shù)，設(shè)計(jì)帶凹槽的試樣和剪切試樣并進(jìn)行拉伸試驗(yàn)，獲得兩種Al6061板料試樣的載荷-位移曲線。基于ABAQUS 軟件建立Al6061板料的有限元模型，應(yīng)用反向優(yōu)化法標(biāo)定GTN-Hill1948細(xì)觀損傷模型中的初始孔洞體積分?jǐn)?shù)和剪切損傷參數(shù)，并設(shè)計(jì)帶孔的拉伸試樣對(duì)損傷模型進(jìn)行實(shí)驗(yàn)驗(yàn)證。結(jié)果表明：通過(guò)反向優(yōu)化法來(lái)標(biāo)定的GTN-Hill1948模型中的初始孔洞體積分?jǐn)?shù)為0.0005、剪切損傷參數(shù)為2；中間帶孔的試樣驗(yàn)證所標(biāo)定參數(shù)的正確性，該損傷模型可以有效地預(yù)測(cè)Al6061板料發(fā)生斷裂的位置。
關(guān)鍵字: Al6061板料；GTN-Hill1948損傷模型；損傷演化；反向優(yōu)化法
（1. Molding and Advanced Forming Technology, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
2. School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China）
Abstract:In order to obtain the parameters of the GTN-Hill1948 damage model, a specimen with a notch and a shear specimen of Al6061 panel were designed to get the load-displacement curves. Based on the ABAQUS software, the corresponding model of the specimens was built. The material parameters, void volume fraction and shear damage coefficient of the model were identified by an inverse method, comparing the experimental results with the numerical results. And to verify the correctness of the two parameters, the specimen with a hole was designed. The results show that the initial void volume fraction is 0.0005 and the shear damage coefficient is 2, which are determined by the inverse method. The GTN-Hill1948 damage model can predict the failure location of Al6061 panel.
Key words: Al 6061 panel; GTN-Hill1948 damage model; damage evolution; inverse method
