本文主要研究内容
作者李秀渊（2019）在《芳纶蜂窝材料超声切削过程仿真和实验研究》一文中研究指出：超声辅助切削能够有效减小切削力和切削热、改善被加工材料表面质量并且能够提高加工效率,因此被广泛应用于芳纶蜂窝材料等弱刚度难加工材料切削领域中。尽管可以通过实验手段研究超声切削的工艺优化,但是大量超声切削实验需要的人力、物力和时间成本比较高,并且实验过程中芳纶蜂窝材料的微观破损表面特征呈现困难,而通过仿真手段研究则能够有效弥补超声切削实验本身的缺憾。有限元仿真不仅可以直观、形象地呈现超声切削过程中刀具和芳纶蜂窝材料接触的界面特征,而且能够实时、方便地获取超声切削过程中的切削力,这对芳纶蜂窝材料超声切削过程的切削工艺参数优化、装备开发以及专用刀具研究都具有重要意义。基于此本文开展了芳纶蜂窝材料超声切削过程仿真和实验研究,旨在确定最优的有限元仿真模型来指导超声切削工艺参数的优化。围绕蜂窝材料微观断裂模型、直刀超声切削仿真模型、圆刀超声切削仿真模型、基于仿真分析的超声切削工艺参数优化等主要方面,研究工作和研究成果如下:(1)超声切削蜂窝材料的理论基础。研究了蜂窝材料的本构特性和力学性能,根据芳纶蜂窝材料的本构特征推导了基于单层各向同性的芳纶蜂窝材料本构方程,根据小挠度薄板弯曲理论并结合直刀超声切削和圆刀超声切削两种不同的加工工艺,推导出基于薄板理论的直刀超声切削作用下蜂窝材料受力变形公式和圆刀超声切削作用下蜂窝材料受力变形公式,指出超声切削作用下蜂窝材料的断裂特性和断裂状态判定方法。(2)芳纶蜂窝材料超声切削仿真建模的关键技术研究。根据超声切削蜂窝材料的加工特性和芳纶蜂窝材料的结构特点,提出减小材料断裂应变参数来体现超声切削高应变率特点的材料本构建模方法;研究将芳纶蜂窝材料胞壁结构中的芳纶纸和酚醛树脂看作整体或装配体分别构建基于单层和多层的材料结构模型,并进一步从几何建模角度将单层材料结构模型细化为整体建模、层状建模和壳体建模三种单层模型,针对三种单层和一种多层的材料结构模型,分别定义了材料本构特性并分析仿真模式下超声切削过程中的断裂特点。(3)直刀超声切削仿真。通过对比直刀超声切削仿真后处理模型中胞壁节点在进给方向的位移量和基于薄板理论计算的直刀超声切削作用下蜂窝材料胞壁上对应位置的挠度,以及从进给方向的切削力、蜂窝材料变形破损过程两个角度比较超声切削仿真结果与实际切削实验结果的相符性,结果表明,多层仿真模型的综合精度最高,但耗时长;单层仿真模型中层状建模方法的综合性能最优,并且还可以预测芳纶蜂窝材料在实际切削加工后的表面破坏特征。(4)圆刀超声切削仿真。构建了采用层状建模方法的芳纶蜂窝材料单层材料结构模型,对比了圆刀超声切削作用下切削力的仿真结果和实验结果、位移量的仿真计算结果和理论计算结果,表明本文所建圆刀超声切削仿真模型是有效的。(5)工艺参数优化。通过引入有限元仿真技术,在现有超声切削仿真模型的基础上以超声切削力最小为优化目标,结合正交实验方案设计和极差分析方法针对直刀和圆刀分别获取超声切削作用下的最优工艺参数组合,利用超声切削实验来验证基于仿真分析的超声切削工艺参数优化的可靠性。仿真优化结果表明:优化后的超声切削工艺参数能够降低超声切削力,基于仿真手段获取最佳工艺参数的方法能够大幅度缩减芳纶蜂窝材料超声切削工艺参数优化的研究周期。
Abstract
chao sheng fu zhu qie xiao neng gou you xiao jian xiao qie xiao li he qie xiao re 、gai shan bei jia gong cai liao biao mian zhi liang bing ju neng gou di gao jia gong xiao lv ,yin ci bei an fan ying yong yu fang guan feng wo cai liao deng ruo gang du nan jia gong cai liao qie xiao ling yu zhong 。jin guan ke yi tong guo shi yan shou duan yan jiu chao sheng qie xiao de gong yi you hua ,dan shi da liang chao sheng qie xiao shi yan xu yao de ren li 、wu li he shi jian cheng ben bi jiao gao ,bing ju shi yan guo cheng zhong fang guan feng wo cai liao de wei guan po sun biao mian te zheng cheng xian kun nan ,er tong guo fang zhen shou duan yan jiu ze neng gou you xiao mi bu chao sheng qie xiao shi yan ben shen de que han 。you xian yuan fang zhen bu jin ke yi zhi guan 、xing xiang de cheng xian chao sheng qie xiao guo cheng zhong dao ju he fang guan feng wo cai liao jie chu de jie mian te zheng ,er ju neng gou shi shi 、fang bian de huo qu chao sheng qie xiao guo cheng zhong de qie xiao li ,zhe dui fang guan feng wo cai liao chao sheng qie xiao guo cheng de qie xiao gong yi can shu you hua 、zhuang bei kai fa yi ji zhuan yong dao ju yan jiu dou ju you chong yao yi yi 。ji yu ci ben wen kai zhan le fang guan feng wo cai liao chao sheng qie xiao guo cheng fang zhen he shi yan yan jiu ,zhi zai que ding zui you de you xian yuan fang zhen mo xing lai zhi dao chao sheng qie xiao gong yi can shu de you hua 。wei rao feng wo cai liao wei guan duan lie mo xing 、zhi dao chao sheng qie xiao fang zhen mo xing 、yuan dao chao sheng qie xiao fang zhen mo xing 、ji yu fang zhen fen xi de chao sheng qie xiao gong yi can shu you hua deng zhu yao fang mian ,yan jiu gong zuo he yan jiu cheng guo ru xia :(1)chao sheng qie xiao feng wo cai liao de li lun ji chu 。yan jiu le feng wo cai liao de ben gou te xing he li xue xing neng ,gen ju fang guan feng wo cai liao de ben gou te zheng tui dao le ji yu chan ceng ge xiang tong xing de fang guan feng wo cai liao ben gou fang cheng ,gen ju xiao nao du bao ban wan qu li lun bing jie ge zhi dao chao sheng qie xiao he yuan dao chao sheng qie xiao liang chong bu tong de jia gong gong yi ,tui dao chu ji yu bao ban li lun de zhi dao chao sheng qie xiao zuo yong xia feng wo cai liao shou li bian xing gong shi he yuan dao chao sheng qie xiao zuo yong xia feng wo cai liao shou li bian xing gong shi ,zhi chu chao sheng qie xiao zuo yong xia feng wo cai liao de duan lie te xing he duan lie zhuang tai pan ding fang fa 。(2)fang guan feng wo cai liao chao sheng qie xiao fang zhen jian mo de guan jian ji shu yan jiu 。gen ju chao sheng qie xiao feng wo cai liao de jia gong te xing he fang guan feng wo cai liao de jie gou te dian ,di chu jian xiao cai liao duan lie ying bian can shu lai ti xian chao sheng qie xiao gao ying bian lv te dian de cai liao ben gou jian mo fang fa ;yan jiu jiang fang guan feng wo cai liao bao bi jie gou zhong de fang guan zhi he fen quan shu zhi kan zuo zheng ti huo zhuang pei ti fen bie gou jian ji yu chan ceng he duo ceng de cai liao jie gou mo xing ,bing jin yi bu cong ji he jian mo jiao du jiang chan ceng cai liao jie gou mo xing xi hua wei zheng ti jian mo 、ceng zhuang jian mo he ke ti jian mo san chong chan ceng mo xing ,zhen dui san chong chan ceng he yi chong duo ceng de cai liao jie gou mo xing ,fen bie ding yi le cai liao ben gou te xing bing fen xi fang zhen mo shi xia chao sheng qie xiao guo cheng zhong de duan lie te dian 。(3)zhi dao chao sheng qie xiao fang zhen 。tong guo dui bi zhi dao chao sheng qie xiao fang zhen hou chu li mo xing zhong bao bi jie dian zai jin gei fang xiang de wei yi liang he ji yu bao ban li lun ji suan de zhi dao chao sheng qie xiao zuo yong xia feng wo cai liao bao bi shang dui ying wei zhi de nao du ,yi ji cong jin gei fang xiang de qie xiao li 、feng wo cai liao bian xing po sun guo cheng liang ge jiao du bi jiao chao sheng qie xiao fang zhen jie guo yu shi ji qie xiao shi yan jie guo de xiang fu xing ,jie guo biao ming ,duo ceng fang zhen mo xing de zeng ge jing du zui gao ,dan hao shi chang ;chan ceng fang zhen mo xing zhong ceng zhuang jian mo fang fa de zeng ge xing neng zui you ,bing ju hai ke yi yu ce fang guan feng wo cai liao zai shi ji qie xiao jia gong hou de biao mian po huai te zheng 。(4)yuan dao chao sheng qie xiao fang zhen 。gou jian le cai yong ceng zhuang jian mo fang fa de fang guan feng wo cai liao chan ceng cai liao jie gou mo xing ,dui bi le yuan dao chao sheng qie xiao zuo yong xia qie xiao li de fang zhen jie guo he shi yan jie guo 、wei yi liang de fang zhen ji suan jie guo he li lun ji suan jie guo ,biao ming ben wen suo jian yuan dao chao sheng qie xiao fang zhen mo xing shi you xiao de 。(5)gong yi can shu you hua 。tong guo yin ru you xian yuan fang zhen ji shu ,zai xian you chao sheng qie xiao fang zhen mo xing de ji chu shang yi chao sheng qie xiao li zui xiao wei you hua mu biao ,jie ge zheng jiao shi yan fang an she ji he ji cha fen xi fang fa zhen dui zhi dao he yuan dao fen bie huo qu chao sheng qie xiao zuo yong xia de zui you gong yi can shu zu ge ,li yong chao sheng qie xiao shi yan lai yan zheng ji yu fang zhen fen xi de chao sheng qie xiao gong yi can shu you hua de ke kao xing 。fang zhen you hua jie guo biao ming :you hua hou de chao sheng qie xiao gong yi can shu neng gou jiang di chao sheng qie xiao li ,ji yu fang zhen shou duan huo qu zui jia gong yi can shu de fang fa neng gou da fu du su jian fang guan feng wo cai liao chao sheng qie xiao gong yi can shu you hua de yan jiu zhou ji 。
论文参考文献
论文详细介绍
论文作者分别是来自杭州电子科技大学的李秀渊，发表于刊物杭州电子科技大学2019-05-13论文，是一篇关于芳纶蜂窝材料论文,直刀超声切削论文,圆刀超声切削论文,切削仿真模型论文,工艺优化论文,杭州电子科技大学2019-05-13论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自杭州电子科技大学2019-05-13论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：芳纶蜂窝材料论文; 直刀超声切削论文; 圆刀超声切削论文; 切削仿真模型论文; 工艺优化论文; 杭州电子科技大学2019-05-13论文;