(1. 燕山大學(xué) 國(guó)家冷軋板帶裝備及工藝工程技術(shù)研究中心，秦皇島 066004;
2. 燕山大學(xué) 先進(jìn)鍛壓成形技術(shù)與科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室，秦皇島 066004)
摘 要: 對(duì)AZ31B鎂合金復(fù)雜截面零件固體顆粒介質(zhì)成形過(guò)程進(jìn)行研究。結(jié)合鎂合金熱態(tài)單向拉伸試驗(yàn)和有限元逆向法，確定預(yù)測(cè)熱態(tài)下鎂合金成形極限的Gurson-Tvergaard-Needleman(GTN)模型損傷參數(shù)。以鎂合金異形件為研究對(duì)象，基于鎂合金GTN損傷模型，采用有限元軟件ABAQUS模擬該異形件的成形過(guò)程，分析不同工藝參數(shù)對(duì)工件壁厚和孔洞體積分?jǐn)?shù)的影響，確定了該異形件的最佳成形工藝參數(shù)。設(shè)計(jì)了鎂合金異形件固體顆粒介質(zhì)成形模具并展開(kāi)了相關(guān)試驗(yàn)，試驗(yàn)結(jié)果與基于GTN損傷模型的仿真結(jié)果基本吻合，并基于最佳模擬參數(shù)獲得了合格的零件。
關(guān)鍵字: 鎂合金；異形件；GTN模型；顆粒介質(zhì)
（1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China;
2. Key Laboratory of Advanced Forging and Stamping Technology and Science, Ministry of Education, Yanshan University, Qinhuangdao 066004, China）
Abstract:The magnesium alloy part with complex section was researched based on solid granule medium forming (SGMF). Combined with magnesium alloy tensile test at high temperature and inverse finite element method, Gurson-Tvergaard-Needleman(GTN) parameters of magnesium alloy were obtained which can predict magnesium alloy forming limit. Based on magnesium alloy GTN model, magnesium alloy special shaped part forming process was simulated by ABAQUS. Wall thickness and void volume fraction of workpiece were analyzed with different technological parameters, and the optimum technological parameter was identified. Experimental dies of special shaped part were designed, and corresponding forming experiments were carried out. The experiment results are in good agreement with that of magnesium alloy by predicted GTN model, and qualified part is obtained with optimum technological parameter.
Key words: magnesium alloy; special shaped part; GTN model; granule medium
