典型文献
Deformation-softening behaviors of high-strength and high-toughness steels used for rock bolts
文献摘要：
In deep ground engineering,the use of high-strength and high-toughness steels for rock bolt can significantly improve its energy absorption capacity.However,the mechanisms and effects of rock loading conditions on this kind of high energy-absorbing steel for rock bolt remain immature.In this study,taking Muzhailing highway tunnel as the background,physically based crystal plasticity simula-tions were performed to understand the effect of rock loading rate and pretension on the deformation behaviors of twinning induced plasticity(TWIP)steel used for rock bolt.The material physical connecting to the underlying microscopic mechanisms of dislocation glide and deformation twinning were incor-porated in numerical modeling.The rock loading conditions were mimicked by the real-time field monitoring data of the NPR bolt/cable equipment installed on the tunnel surrounding rock surface.The results indicate that the bolt rod exhibits pronounced deformation-softening behavior with decrease of the loading rate.There is also a sound deformation-relaxation phenomenon induced by the dramatic decrease of loading rate after pre-tensioning.The high pretension(＞600 MPa or 224 kN)can help bolt rod steel resist deformation-softening behavior,especially at low loading rate(＜10-1 MPa/s or 10-2 kN/s).The loading rate was found to be a significant factor affecting deformation-softening behavior while the pretension was found to be the major parameter accounting for the deformation-relaxation scenario.The results provide the theoretical basis and technical support for practical applications.
文献关键词：
中图分类号：
作者姓名：
Ding Wang;Manchao He;Zhigang Tao;Aipeng Guo;Xuchun Wang
作者机构：
State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining&Technology,Beijing,100083,China;Research Institute for Deep Underground Science and Engineering,China University of Mining&Technology,Beijing,100083,China;School of Civil Engineering,Qingdao University of Technology,Qingdao,266033,China
文献出处：
引用格式：
[1]Ding Wang;Manchao He;Zhigang Tao;Aipeng Guo;Xuchun Wang-.Deformation-softening behaviors of high-strength and high-toughness steels used for rock bolts)[J].岩石力学与岩土工程学报（英文版）,2022(06):1872-1884
A类：
Muzhailing,tensioning
B类：
Deformation,softening,behaviors,strength,toughness,steels,used,rock,bolts,In,deep,engineering,significantly,improve,energy,absorption,capacity,However,mechanisms,effects,loading,conditions,this,kind,absorbing,remain,immature,study,taking,highway,tunnel,background,physically,crystal,plasticity,simula,were,performed,understand,pretension,deformation,twinning,induced,TWIP,material,connecting,underlying,microscopic,dislocation,glide,incor,porated,numerical,modeling,mimicked,by,real,field,monitoring,data,NPR,cable,equipment,installed,surrounding,surface,results,indicate,that,rod,exhibits,pronounced,decrease,There,also,sound,relaxation,phenomenon,dramatic,after,kN,help,resist,especially,low,was,found,affecting,while,major,parameter,accounting,scenario,provide,theoretical,basis,technical,support,practical,applications
AB值：
0.469124
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
