深圳信息职业技术学院学报
深圳信息職業技術學院學報
심수신식직업기술학원학보
Journal of Shenzhen Institute of Information Technology
2015年
3期
75-79
,共5页
有限变形%屈服准则%本构模型%数值模拟
有限變形%屈服準則%本構模型%數值模擬
유한변형%굴복준칙%본구모형%수치모의
finite deformation%yield criterion%constitutive model%numerical simulation
对Al粉轧制所得的烧结带材的二次轧制进行了分析。基于连续介质力学对金属粉末轧制的有限变形弹塑性本构模型进行了研究，并编制了计算模块。分析了不同压缩率下烧结Al带二次轧制后的宏观形貌及变形参数，并针对各种压缩率下烧结Al带的二次轧制过程进行了数值模拟，对其应变、相对密度、轧制力等参数进行了研究。模拟所得的相对密度及轧制力跟实测结果整体上相符，模拟值略大于实测值，其中密度相对误差在6％以内，最大轧制力相对误差在3.2％以内。对比表明本文的理论模型及计算模块稳定可靠。
對Al粉軋製所得的燒結帶材的二次軋製進行瞭分析。基于連續介質力學對金屬粉末軋製的有限變形彈塑性本構模型進行瞭研究，併編製瞭計算模塊。分析瞭不同壓縮率下燒結Al帶二次軋製後的宏觀形貌及變形參數，併針對各種壓縮率下燒結Al帶的二次軋製過程進行瞭數值模擬，對其應變、相對密度、軋製力等參數進行瞭研究。模擬所得的相對密度及軋製力跟實測結果整體上相符，模擬值略大于實測值，其中密度相對誤差在6％以內，最大軋製力相對誤差在3.2％以內。對比錶明本文的理論模型及計算模塊穩定可靠。
대Al분알제소득적소결대재적이차알제진행료분석。기우련속개질역학대금속분말알제적유한변형탄소성본구모형진행료연구，병편제료계산모괴。분석료불동압축솔하소결Al대이차알제후적굉관형모급변형삼수，병침대각충압축솔하소결Al대적이차알제과정진행료수치모의，대기응변、상대밀도、알제력등삼수진행료연구。모의소득적상대밀도급알제력근실측결과정체상상부，모의치략대우실측치，기중밀도상대오차재6％이내，최대알제력상대오차재3.2％이내。대비표명본문적이론모형급계산모괴은정가고。
The secondary rolling of the sintered porous Al strip made from rolling compaction was studied. The finite deformation elasto-plastic constitutive model and calculation code was derived based on compressible continuum mechanics. The macro characteristics of the second-rolled Al strip under four different compaction ratio were studied and the numerical simulation for second rolling processes was performed. For the relative density and rolling force, Simulation values were a little bigger than experiment ones. The relative error for density was within 6%, while 3.2% for maximum rolling force, which proved the reliability of the mechanical models and calculation code applied in this paper.
