中国机械工程2018，Vol.29Issue(7)：817-823,7.DOI:10.3969/j.issn.1004-132X.2018.07.010
PDC钻头切削断面对破岩效率的影响
Influences of Cutting Shapes of PDC Bits on Rock Breaking Efficiency
摘要
Abstract
According to the elastic-plastic mechanics and rock mechanics,the Drucker-Prager crite-rion was used as the rock constitutive relation and the shear criterion was used to predict damage initi-ations.Based on the feasibility of rock model and PDC cutter-rock modeling method,a three-dimen-sional simulation model of cutting shapes rock with a PDC cutter was established,and the influences of cutting areas,the back rake angles and side rake angles of the PDC cutters on rock breaking effi-ciency were studied for different confining pressures.The results show that reducing the cutting shape areas under any confining pressures is benefit to rock breaking,and the wide cutting shapes may be used in PDC bits.Compared with the side rake angles of the PDC cutters,the back rake angles of the PDC cutters have greater effects on rock breaking efficiency,and the optimal back rake angle is as 5° at low confining pressure and is as 20°at high confining pressures.关键词
PDC钻头/切削断面/破岩效率/Drucker-Prager准则/数值模拟Key words
PDC bit/cutting shape/rock breaking efficiency/Drucker-Prager yield criteria/nu-merical simulation分类
能源科技引用本文复制引用
祝效华,易勤健..PDC钻头切削断面对破岩效率的影响[J].中国机械工程,2018,29(7):817-823,7.基金项目
国家自然科学基金资助项目(51674214) （51674214）
四川省青年科技创新团队资助项目(2017TD0014) （2017TD0014）
四川省科技计划国际合作计划资助项目(2016HH0008) （2016HH0008）
