摘要
利用电子万能试验机进行了不同相对密度材料的压缩实验,建立了基于Shima-Oyane模型的多孔Monel400合金及其复合板的本构模型。利用MSC.Marc软件对压缩过程进行了有限元模拟,将变形抗力本构模型的计算值与有限元模拟值和实测值对比,最大误差均低于10%,验证了所建立的本构模型的准确性。实验结果显示,多孔Monel400合金的屈服强度随着相对密度的增加而增加,且将拟合线外推至致密态,可得致密体屈服强度为186.21 MPa,与致密体Monel400合金屈服强度相符。在压缩过程中,径向应变、体积应变随轴向应变的增加而提高。随着压缩过程的进行,试样的直径扩张速度提高,内部孔洞逐渐缩小,可压缩性逐渐降低。
The compression experiments of specimens with different relative densities were carried out using electronic universal compres-sion test machine,and the constitutive model of porous Monel 400 alloy and its composite plates based on the Shima-Oyane model was es-tablished.The finite element simulation of the compression process was carried out by MSC.Marc software,and the of calculated values and finite element simulation values deformation resistance of constitutive model were compared with the measured values,and the maxi-mum errors were less than 10%,which verifies the accuracy of the constitutive model.The experimental results show that the yield strength of the Monel porous alloy increases with the increase of relative density,and the yield strength of the dense body is 186.21 MPa by extrapolating the fitting line to the dense state,which is consistent with the yield strength of the dense body Monel400 alloy.In the com-pression process,the radial strain and volumetric strain increase with the increase of axial strain.As the compression process progresses,the diameter expansion rate of the specimen increases,the internal pores gradually shrink,and the compressibility gradually decreases.
作者
陈素文
丁文杰
钱家敏
郭文渊
孙建亮
CHEN Su-wen;DING Wen-jie;QIAN Jia-min;GUO Wen-yuan;SUN Jian-liang(College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China;National Engineering Research Center for Equipment and Technology of C.S.R.,Yanshan University,Qinhuangdao 066004,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2024年第12期98-106,共9页
Journal of Plasticity Engineering
基金
国家自然科学基金面上资助项目(52075473)
河北省教育厅科学研究项目(ZD2022044)。
