朱哲明
岩石断裂力学; 冲击波及爆炸力学; 计算力学; 矿山及井下充填的稳定;构造地质力学。
个性化签名
- 姓名:朱哲明
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
力学
- 研究兴趣:岩石断裂力学; 冲击波及爆炸力学; 计算力学; 矿山及井下充填的稳定;构造地质力学。
朱哲明:
四川大学特聘教授,博士生导师, 四川大学985工程学术带头人(西南资源环境与灾害防治)。1965年出生于辽宁,胡芦岛市;获得博士学位于著名的 McGill 大学,博士后研究于著名的 Toronto 大学. 曾在国际著名刊物上,如《Journal of Engineering Mechanics》;《Geological Magazine》;《Engineering Fracture Mechanics》,《International Journal of Rock Mechanics and Mining Sciences,》,《Mathematics and Mechanics of Solids》以及国内的《力学学报》,《计算力学学报》,《实验力学》等发表多篇论文。
教育背景:
博士后研究于加拿大 Toronto 大学, 土木工程系(Civil Engineering), 2002-2005;
博士毕业于加拿大 McGill 大学, 采矿,冶金及材料工程系,1998-2002;
博士生学习于中国矿业大学 (没完成因去加拿大 Montreal 大学工作),1994-1996;
硕士及本科毕业于辽宁工程技术大学,1982-1988;1990-1991;
工作经历:
四川大学建筑与环境学院教授 (特聘), 2005-现在;
加拿大 Montreal 大学研究工作 (Research Associate), 地质工程系,1996-1998;
辽宁工程技术大学讲师,力学系,1988-1994。
研究兴趣:
岩石断裂力学; 冲击波及爆炸力学; 计算力学; 矿山及井下充填的稳定;构造地质力学.
科研课题:
1)冲击波破岩基理研究,加拿大自然科学基金(2002-2005).
2)井下充填的稳定分析,加拿大自然科学基金(1998-2002), (参考 Zheming Zhu, Ph.D. thesis, McGill University, 2002);
3)沉积岩的结理间距与岩层厚度的关系, 加拿大自然科学基金(1996-1998);
负责在研课题:
1) 深部岩体的工程特性研究项目的子项目—深部岩体裂隙扩展理论及数值分析,国家自然基金重点项目 50639100;
2)带裂隙岩体在压缩载荷作用下的稳定性研究, 四川省科技计划项目, 2008JY0041;
3)脆性材料在压缩载荷作用下的破毁准则, 引进人才启动基金;
4)岩石动态数值模拟研究, 引进人才启动基金.
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成果数
7
【期刊论文】An Alternative Form of Propagation Criterion for Two Collinear Cracks under Compression
朱哲明, ZHEMING ZHU
Mathematics and Mechanics of Solids 14: 727-746, 2009,-0001,():
-1年11月30日
Under compression, cracks extend, branch and coalesce. These fracturing processes have received much attention recently. In this paper, an attempt is made to find the analytical solution of stress intensity factors for the special case of cracks situated along a straight line, and to set up a fracture criterion. Under compression, cracks close and the crack surface friction can resist crack surface sliding. Considering crack surface friction, a set of complex stress functions is proposed for the special case of cracks situated along a straight line. The analytical solution is formulated, and for the case of only two collinear cracks inside an infinite plate, the exact analytical solution of stress intensity factor is presented. Finally, an alternative form of crack propagation criterion for two collinear cracks under compression is developed, which is expressed in terms of principal stresses. For the case of materials without pre-existing macrocracks, this new propagation criterion becomes the well known Coulomb–Mohr criterion.
stress intensity factor,, crack propagation criterion,, crack surface friction,, fracture toughness
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【期刊论文】Numerical investigation of blasting-induced damage in cylindrical rocks
朱哲明, Zheming Zhua, Heping Xiea, Bibhu Mohantyb
International Journal of Rock Mechanics & Mining Sciences 45(2008)111-121,-0001,():
-1年11月30日
In order to investigate rock fracture and fragmentation mechanisms under dynamic loading, a cylindrical rock model with a centralized borehole is developed through the use of AUTODYN code. According to the material properties and loading conditions, four kinds of equation of state (EOS), linear, shock, compaction and ideal gas, are applied to the four kinds of materials employed in this numerical model. A modified principal stress failure criterion is applied to determining material status, and a well-behaved explosive, PETN, and a relatively homogeneous igneous rock, diorite, are used in this rock model. A single centrally located line source of explosive is fired numerically to produce the dynamic loadings operating on the surrounding rocks. This numerical model is applied to actual blasting conditions. The rock failure mechanism under dynamic loading is first analyzed, and then the influences of the following factors on rock fracturing are discussed: (a) coupling medium, (b) confinement, (c) boundary condition, (d) initiation location in an explosive column, and (e) air ducking. The results show that all these factors have significant effects on rock fracturing under dynamic loading. r 2007 Elsevier Ltd. All rights reserved.
Dynamic fracture, Blasting, Numerical model, Stress wave, Crack propagation
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【期刊论文】Numerical investigation of blasting-induced crack initiation and propagation in rocks
朱哲明, Zheming Zhua, Bibhu Mohantyb, Heping Xiea
International Journal of Rock Mechanics & Mining Sciences 44(2007)412-424,-0001,():
-1年11月30日
To investigate the dynamic fracture mechanism related to blast-induced borehole breakdown and crack propagation, circular rock models containing a single centrally located source of explosive were numerically blasted using the AUTODYN 2D code. According to the material properties and loading conditions, four kinds of equations of state, linear, shock, compaction and ideal gas, are used. A modified principal stress failure criterion is applied to determining material status. The dynamic stresses at the selected target points in a rock sample are computed as a function of time following application of explosive load. It is shown that shear stress (resulting from intense compressive stress) causes a crushed zone near the borehole, the major tensile principal stress causes radial cracks, and the reflected stress wave from free boundary causes circumferential cracks some distance away from the free boundary. The influences of the factors of boundary condition, coupling medium, borehole diameter, decoupling and joint on rock dynamic fracture are discussed.
Dynamic fracture, Blasting, Numerical model, Stress wave, Crack
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【期刊论文】Stress intensity factor for a cracked specimen under compression
朱哲明, Zheming Zhu a, *, Laigui Wang b, Bibhu Mohanty c, Chengyi Huang c
Engineering Fracture Mechanics 73(2006)482-489,-0001,():
-1年11月30日
For a cracked specimen under compression, a set of complex stress functions is proposed and by using the boundary collocation method, the unknown coefficients of these complex stress functions are determined. Based on the calculation results of the boundary collocation method, the formulas of the stress intensity factor for a cracked specimen under compression are obtained, and by using these formulas, the influence of confining stress on stress intensity factor is analyzed. 2005 Elsevier Ltd. All rights reserved.
Complex stress functions, Stress intensity factor, Boundary collocation method, Crack surface friction, Confining stress
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【期刊论文】THE MIXED BOUNDARY PROBLEMS FOR A MIXED MODE CRACK IN A FINITE PLATE
朱哲明, ZHEMING ZHU, HEPING XIE, SHAOCHENG JI
PII: S0013-7944(96)00123-3,-0001,():
-1年11月30日
The mixed boundary problems for a mixed mode crack in a finite plate are studied. Based on the stress conditions of uniform loading on crack surfaces, a set of stress functions is proposed, which is also suitable for the case of crack surface without loading. The stress intensity factors (SIFs)are calculated by using the boundary collocation method. For mixed mode crack under resultant force boundary conditions, the present results agree very well with the existing solutions. For mixed mode crack under mixed boundary conditions, the SIFs have been obtained for different crack angles.
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【期刊论文】AN IMPROVED METHOD OF COLLOCATION FOR THE PROBLEM OF CRACK SURFACE SUBJECTED TO UNIFORM LOAD
朱哲明, ZHU ZHE MING and JI SAO CHENG, XIE HE-PING,
Engineering Fracture Mechanics Vol. 54, No.5, pp. 731-741, 1996,-0001,():
-1年11月30日
An improved method of boundary collocation for the problem in which the crack surface is subjected to uniform load is developed. A new stress function which is based on the stress boundary condition of crack surface is proposed. The conditions on the external boundaries are satisfied approximately by the collocation method. This improved method is applied to calculating the stress intensity factc,r (SIF) values of different angle cracks of square and circular internally cracked plates in which the crack surface is subjected to uniform normal compressive stress q, or uniform shear stress q, The new stre: s function and the calculation procedure are more convenient and simpler than other collocation techniques investigated [1, 2].
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朱哲明, 谢和平, 范天佑*
力学学报,1988,30(2):238~246,-0001,():
-1年11月30日
针对裂纹表面承受载荷时的应力条件,提出了新的应力函数,该应力函数对于各种裂纹模型、各种边界条件、各种边界形状、裂纹表面自由或承受均布载荷等均适用。并利用边界配位法,计算了在压缩载荷下,岩石内部裂纹的应力强度因子(SIF),给出了关于岩石断裂破坏的一些新结论。
边界配位法,, 裂纹表面载荷,, 岩石断裂,, 应力强度因子
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