Volume 43 Issue 3
May  2013
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DAI Lanhong. A pioneer in the frontier of engineering science——Zhe-Min Zheng[J]. Advances in Mechanics, 2013, 43(3): 265-294. doi: 10.6052/1000-0992-13-033
Citation: DAI Lanhong. A pioneer in the frontier of engineering science——Zhe-Min Zheng[J]. Advances in Mechanics, 2013, 43(3): 265-294. doi: 10.6052/1000-0992-13-033

A pioneer in the frontier of engineering science——Zhe-Min Zheng

doi: 10.6052/1000-0992-13-033
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  • Corresponding author: DAI Lanhong
  • Received Date: 2013-05-20
  • Publish Date: 2013-05-25
  • Zhe-Min Zheng, as a famous mechanician, is the founder and pioneer of explosion mechanics in China. He won the State Preeminent Science and Technology Award of China in 2012. This paper reviews the abundant research activities of Zhe-Min Zheng over the past 60 years, especially his outstanding academic contributions in the areas of explosion processing, underground nuclear explosion, blasting push-out silt, armor penetration by shaped charge jet, coal and gas outburst, natural gas hydrate mining, hydro-elastic dynamics, material mechanical behavior, etc. These achievements are marked by distinct character of engineering science, that is, they are motivated from the national significant demands, and reached by refining the critical physical factors and innovative theories from complex issues, and providing useful guide to practice. The scientific contributions and academic thoughts of Zhe-Min Zheng have great practical significance and reference value for the development of mechanics.

     

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  • [1]
    Abrahamson G R. 1961. Permanent periodic surface deformations due to atraveling jet. ASME J. Appl. Mech., 28: 519.
    [2]
    Aleseeveskii V P. 1966. Penetration of a rod into a target at high velocity.Combustion, Explosion, and Shock Waves, 2: 99-106.
    [3]
    Allen W A, Mapes J M, Wilson W G. 1954. An effect produced by oblique impactof a cylinder on a thin target. J. Appl. Phys., 25: 675-676.
    [4]
    Bahrani A S, Black T J, Crossland B. 1968. The mechanics of wave formationin explosive welding. Proc. Roy. Soc. London, A, 296: 123-136.
    [5]
    白以龙. 1992. 冲击载荷下材料的损伤和破坏. 见: 冲击动力学进展, 王礼立等编, 合肥: 中国科技大学出版社, 34-57 (Bai YL. 1992. Damage and failure of materials under impact loading. in: Advances in Impact Dynamics, Wang L L et al ed.Hefei: China Sicence and Technology University Press, 34-57 (in Chinese))
    [6]
    Birkhoff G, MacDougall D P, Pugh E M, Taylor G. 1948. Explosives with linedcavities. J. Appl. Phys., 19: 563-582.
    [7]
    Bolshakov A, Pharr G M. 1998. Influence of pile-up on the measurement ofmechanical properties by load and depth sensing indentation techniques. J. Mater. Res.,13: 1049-1058.
    [8]
    Butkovich T R. 1965. Calculation of the shock wave from an undergroundnuclear explosion in granite. J. Geophys. Res., 70: 885-892.
    [9]
    Carl L R. 1944. Brass weld, made by detonation Impulse. Metal. Prog., 46: 102-103.
    [10]
    陈力.1989.一维煤与瓦斯突出中破坏阵面恒稳推进的实验研究. [硕士论文]. 北京: 中国科学院力学研究所 (Chen L. 1989.Experimental research on steady advancing of failure front in one-dimensional coal and gas outburst. [Master Thesis].Beijing: Institute of Mechanics, Chinese Academy of Science (in Chinese))
    [11]
    Cheng C M (郑哲敏). 1952. Analysis of pipe vibrations with internal fluid flow. A report submitted to theByron-Jackson Pump. Co. at Los Angeles, California,January.
    [12]
    Cheng C M. 1957. Problems in hydro-elasticity. in: Proceedings of 9th International Congress of AppliedMechanics, University of Bruxelles, AvenueFranklin Roosevelt, 7: 497-508.
    [13]
    Cheng C M. 1986a. Mechanics of explosive welding, in: Proceedings of the International Sympousium on IntenseLoadings and ItsEffects, Beijing, 848-853.
    [14]
    Cheng C M. 1986b. Several problems in hydro-elasto-plastic dynamics, in: Proceedings of the internationalSympousium on Intense Loadings and ItsEffects, Beijing, 1-12.
    [15]
    Cheng C M. 1991. On the study of explosion dynamics at the institute ofmechanics. Advances in Science of China, 1: 81-106.
    [16]
    Cheng C M, Li G H. 1986. Effects of strength and compressibility of materials on wave formation at interface inexplosive welding. in: Proceedings of the International Sympousium on Intense Loadings and Its Effects, Beijing, 524-529.
    [17]
    Cheng C M, Tan Q M. 1989. Mechanism of wave formation at theinterface in explosive welding. Acta Mech. Sinica, 5: 97-108.
    [18]
    Cheng C M, Cheng Y T. 1997. On the initial unloading slope in indentation of elasto-plastic solids by anindenter with an axisymmetricsmooth profile. Appl. Phys. Lett., 71: 2623-2625.
    [19]
    Cheng Y T, Cheng C M. 1998. Scaling approach to conical indentationin elastic-plastic solids with work hardening. J. Appl. Phys., 84: 1284-1291.
    [20]
    Cheng Y T, Cheng C M. 2004. Scaling, dimensional analysis, and indentation measurements. Mater. Sci. Eng.R, 44: 91-149.
    [21]
    Chou P C. 1977. The stability of shaped charge. J. Appl. Phys., 48: 4187-4195.
    [22]
    Cole P. 1960. 水下爆炸(中译本). 北京: 国防科学出版社 (Cole P. 1960. Underwater Explosion (Chinese version),Beijing: National Defense Press (in Chinese))
    [23]
    Cowan G R, Bergmann O R, Holtzman A H. 1871. Mechanism of bond zone waveformation in explosion clad metals. Metall. Trans., 2: 3145-3155.
    [24]
    Crossland B. 1982. Explosive Welding of Metals and Its Applications.Clarendon Press.
    [25]
    丁晓良, 俞善炳, 丁雁生, 寇绍全, 谈庆明, 郑哲敏. 1989. 煤在瓦斯渗流作用下持续破坏的机制. 中国科学A, 6: 600-607(Ding Y L, Yu S B, Ding Y S, Kou S Q, Tan Q M, Zheng Z M. 1989. Continuous damage mechanism of coal under gas seepage.China Science A, 6: 600-607 (in Chinese))
    [26]
    Driscoll N W, Weissel J K, Goff J A. 2000. Potential for large-scalesubmarine slope failure and tsunami generation along the U. S. mid-Atlanticcoast. Geology, 28: 407-410.
    [27]
    DuPont E I. 1954. Blasters Handbook. Sesquicentennial Edition Revised,Wilmington: E.I DuPont de Nemours \& Compant (INC) Explosives Department,374-375.
    [28]
    Eggers J. 1997. Nonlinear dynamics and breakup of free-surface flows. Rev. Mod. Phys.,69: 865-927.
    [29]
    Eichelberger R J. 1956. Experimental test of the theory of penetration bymetallic Jets. J. Appl. Phys., 27: 63-68.
    [30]
    Eringen A C. 1977. Continuum Mechanics at the Atomic Scale. Crystal Lattice Defects, 7: 109-130.
    [31]
    Ezra A A. 1973. Principles and Practice of Explosive Metalworking.Industrial Newspaper Limited.
    [32]
    范良藻, 孟珊. 1964. 爆炸成形的成形过程. [研究报告]. 北京: 中国科学院力学研究所 (Fan L Z, Meng S. 1964.Explosive forming process. [Research report]. Beijing: Institute of Mechanics, Chinese Academy of Science (in Chinese))
    [33]
    Findik F. 2011. Recent developments in explosive welding, Mater. Design, 32: 1081-1093.
    [34]
    Fischer-Cripps A C. 2002. Naoindentation. Springer, New York.
    [35]
    Galileo Galilei. 1638. Dialogue Concerning Two New Sciences, Elsevier.
    [36]
    Moridis, G J, Collett T S, Boswell R, Kurihara M, Reagan M T, Koh C, Sloan E D. 2009. Towards production fromgas hydrates: Current status, assessment of resources, and simulation-based evaluation of technology and potential.SPE Reservoir Evaluation and Engineering, 10: 745-771.
    [37]
    Griffith A A. 1921. The phenomena of rupture and flow in solids. Phil. Trans. A, 221:163-198.
    [38]
    洪友士. 2004. 郑哲敏先生主要经历与成就. 见: 应用力学进展, 北京: 科学出版社 (Hong Y S. 2004. The main experienceand achivements of Zhe-Min Zheng. in: Advances in Applied Mechanics, Beijing: Science Press (in Chinese))
    [39]
    Hunt J N. 1968. Wave formation in explosive welding. Phil. Mag., 17: 669-680.
    [40]
    Hutchinson J W. 1968. Singular behavior at the end of a tensile crack tip ina hardening material. J. Mech. Phys. Solids, 16: 13-31.
    [41]
    Irwin G R. 1951. Analysis of stresses and strain near the end of a cracktransversing a plate. ASME J. Appl. Mech., 24: 361-364.
    [42]
    Johnson G W. 1959. Some basic data on underground nuclear explosions,Lwarence Radiation Laboratory. UCRL-5675.
    [43]
    Kowalick J, Hay D R. 1871. A mechanism of explosive bonding. Metall. Trans., 2: 1955-1958.
    [44]
    鲁晓兵, 张旭辉, 郑哲敏, 刘乐乐. 2011. 机械-热水合物开采方法. [研究报告]. 北京: 中国科学院力学研究所 (Lu X B,Zhang X H, Zheng Z M, Liu L L. 2011. Mechanical-thermal method of hydrate production. [Research report]. Beijing:Institute of Mechanics, Chinese Academy of Science (in Chinese))
    [45]
    Meyers M A. 1994. Dynamic Behavior of Materials. John Willey \& Sons,INC,New York.
    [46]
    Munroe C E. 1888a. Modern explosives. Scribners, 5: 563-576.
    [47]
    Munroe C E. 1888b. Wave-like effects produced by detonation of guncotton.Amer. J. Science, 36: 48-50.
    [48]
    Nuckolls J H. 1959. A computer calculation of Rainier (The first 100milliseconds), Lwarence Radiation Laboratory, UCRL-5675.
    [49]
    Oliver W C, Pharr G M. 1992. An improved technique for determining hardness and elastic modulus using load anddisplacement sensing indentationexperiments, J. Mater. Res., 7: 1564-1583.
    [50]
    Oliver W C , Pharr G M. 2004, Measurement of hardness and elastic modulus by instrumented indentation: Advancesin understanding and refinements tomethodology, J. Mater. Res., 19: 3-20.
    [51]
    Orowan E. 1948. Fracture and strength of solids, Report of Progress in Physiscs, 12: 185-232.
    [52]
    Peng F J, Tan Q M, Cheng C M. 2000. Laboratory study on cracks in saturatedsands. Acta Mech. Sinica, 16: 48-54.
    [53]
    Philipchuk V. 1959. Explosive welding and forming open another door forindustry, Weld Engineering , 44: 6l-62.
    [54]
    钱学森. 1957. 论技术科学. 科学通报, 4: 97-104 (Qiang X S. 1957. On technical science. Chinese ScienceBulletin, 4: 97-104 (in Chinese))
    [55]
    Rayleigh L. 1879. On the capillary phenomenon of jets. Proc. Roy. Soc. London, 29: 71-97.
    [56]
    Rice J R. 1968. A path independent integral and approximation analysis ofstrain concentration by notches and cracks, ASME J. Appl. Mech., 35: 379-386.
    [57]
    Rice J R, Rosengren G F. 1968. Plane strain deformation near a crack tip inpower law hardening material, J. Mech. Phys. Solids, 16, 1-12.
    [58]
    Robinson J L. 1975. Mechanics of wave formation in impact welding, Phil. Mag., 31:587-590.
    [59]
    Snay H G. 1956. Hydrodynamics of underwater explosions. in: Symposium on NavalHydrodynamics. (Sherman F S ed.), 325.
    [60]
    谈庆明. 2005. 量纲分析. 合肥: 中国科技大学出版社 (Tan Q M. 2005. Dimensional Analysis. Hefei: China Science andTechnology University Press (in Chinese))
    [61]
    Tate A. 1967. A theory for the deceleration of long rods after impact. J. Mech. Phys. Solids,15: 387-399.
    [62]
    Taylor G I. 1943. A formulation of Mr. Tuck's conception of munroe jets. in:Scientific Papers of G.I. Taylor (1963), New York, 358-362.
    [63]
    Trehu A M, Bohrmann G, Rack F R, Torres M E, et al. 2003. Explanatorynotes. in: Proceedings of the Ocean Drilling Program, Initial Reports, V.204.
    [64]
    Tsien Hsue-Shen (钱学森). 1948. Engineering and engineering science. J. Chin. Inst. Eng., 6: 1-14.
    [65]
    von Foerster M. 1883. Experiments with Compressed Gun Cotton, Berlin,Germany: Mittler und Sohn.
    [66]
    von Karman T. 1911. Festigkeitsversuch unter allseitigem druck, Zeitshrift des Vereines DeutscherIngenieure, 55:1794-1757.
    [67]
    von Karman T, Duwez P. 1950. The propagation of plastic deformation insolids, J. Appl. Phys., 21: 987-994.
    [68]
    Wilkins M L. 1964. Calculation of Elastic-Plastic Flow, in Methods inComputational Physics (B. Alder, S. Fernbach and M. Rotenberg), AcademicPress, New York and London.
    [69]
    Wood W W. 1967. Experimental mechanics at velocity extremes---very highstrain rates, Experimental Mechanics, 7: 441-446.
    [70]
    Yang R, Zhang T H, Jiang P, Bai Y L. 2008. Experimental verification and theoretical analysis of therelationships between hardness,elastic modulus, and the work of indentation. Appl. Phys. Lett., 92: 231906.
    [71]
    杨卫. 1995. 宏微观断裂力学. 北京: 国防工业出版社 (Yang W. 1995. Macroscopic and Microscopic Fracture Mechanics.Beijing: National Defense Industrial Press (in Chinese))
    [72]
    伊万诺夫. 1988. 亚黏土爆破压实. 北京: 水利水电爆破咨询部 (Ivanov. 1988. Clayey Soil Compaction by Blasting.Beijing: Consulting Department of Water Resources and Hydropower Blasting (in Chinese))
    [73]
    虞吉林, 郑哲敏. 1984. 一种非局部弹塑性连续体模型与裂纹尖端附近的应力分布.力学学报, 16: 485-494 (YU J L, Zheng Z M. 1984. A model of nonlocal elastic-plastic continuum applied to the stressdistribution near a crack tip. Acta Mechanica Sinica, 16: 485-494 (in Chinese))
    [74]
    Zhang X H, Lu X B, Li Q P. 2011. Formation of layered fracture and outburst during gas hydrate dissociation.J. Petro. Eng. Sci., 76: 212-216
    [75]
    张登霞, 李国豪、周之洪, 邵丙璜. 1984. 材料强度在爆炸焊接界面波形成中的作用. 力学学报, 16: 73-80 (Zhang D X, Li GH, Zhou Z H, Shao P H. 1984. (Effect of material strength on forming process of explosive welding interface wave. Acta Mechanica Sinica, 16: 73-80 (inChinese))
    [76]
    张建华, 张亮, 顾道良.1989. 爆炸排淤填石法实验研究. 第四届全国工程爆破会议报告 (Zhang J H, Zhang L, Gu D L.1989. Experimental study on toe-shooting method. in: the 4th National Engineering Blasting Conference (in Chinese))
    [77]
    张旭辉. 2010.水合物沉积层因水合物热分解引起的软化和破坏研究. [博士论文], 北京:中国科学院力学研究所 (Zhang X H.2010. Research on the softening and damage of hydrate deposit due to the themal decompositon of hydrates. [PhD thesis].Beijing: Institute of Mechanics, Chinese Academy of Science (in Chinese))
    [78]
    郑哲敏. 1957. 关于工程地震的若干问题. 力学学报, 1: 337-349 (Zheng Z M. 1957. A review on engineeringseismology. Acta Mechanica Sinica,1: 337-349(in Chinese))
    [79]
    郑哲敏. 1958a. 平板在流体作用下的振动. 力学学报, 2: 11-16 (Zheng Z M. 1958a. Vibration of panel in thepresence of a fluid. Acta MechanicaSinica, 2:11-16(in Chinese))
    [80]
    郑哲敏. 1958b. 输水管的振动问题. 力学学报, 2: 100-111 (Zheng Z M. 1958b . Vibration of pipe line. ActaMechanica Sinica, 2: 100-111(inChinese))
    [81]
    郑哲敏, 马宗魁. 1959. 悬臂梁在一侧受有液体作用时的自由振动. 力学学报, 3: 111-119 (Zheng Z M, Ma Z K. 1959.Vibration of cantilever beam placed against water with free surface.Acta Mechanica Sinica, 3: 111-119(in Chinese))
    [82]
    郑哲敏, 孙同坤, 孙国芳. 1962. 球壳的变形计算和能量准则. [研究报告]. 北京: 中国科学院力学研究所 (Zheng Z M, Sun TK, Sun G F. 1962. Calculation and energy criterion of shell deformation. [Research report]. Beijing: Institute ofMechanics, Chinese Academy of Science (in Chinese))
    [83]
    郑哲敏. 1962a. 爆炸成形模型律. [研究报告]. 北京: 中国科学院力学研究所 (Zheng Z M. 1962a. Scaling law ofexplosion forming. [Research report]. Beijing: Institute of Mechanics, Chinese Academy of Science (in Chinese))
    [84]
    郑哲敏. 1962b.水中击波入射平板时空化的形成及其作用. [研究报告]. 北京: 中国科学院力学研究所 (Zheng Z M. 1962b.Formation and effect of cavitation in shock wave intruding slab under water. [Research report]. Beijing: Institute ofMechanics, Chinese Academy of Science (in Chinese))
    [85]
    郑哲敏, 解伯民. 1965. 关于地下爆炸计算模型的一个建议. [研究报告]. 北京: 中国科学院力学研究所 (Zheng Z M, Xie BM. 1965. A suggestion on the calculation model of underground explosion. [Research report]. Beijing: Institute ofMechanics, Chinese Academy of Science (in Chinese))
    [86]
    郑哲敏, 解伯民, 刘育魁, 张德良. 1967a. 关于地下核爆炸理论计算的一个建议(第2稿). [研究报告]. 北京:中国科学院力学研究所 (Zheng Z M, Xie B M, Liu Y K, Zhang D L. 1967a. A suggestion on the theoretical analysis ofunderground nuclear explosion (the 2th version). [Research report]. Beijing: Institute of Mechanics, Chinese Academy ofScience (in Chinese))
    [87]
    郑哲敏, 解伯民, 刘育魁, 张德良. 1967b. 地下核爆炸力学效应1967年计算小结. [研究报告]. 北京: 中国科学院力学研究所(Zheng Z M, Xie B M, Liu Y K, Zhang D L. 1967b. Brief summary of mechanical effect of underground nuclear explosion in1967. [Research report]. Beijing: Institute of Mechanics, Chinese Academy of Science (in Chinese))
    [88]
    郑哲敏, 解伯民, 刘育魁, 张德良. 1969. 地下核爆炸的流体弹塑性计算方案和若干结果. [研究报告]. 北京:中国科学院力学研究所 (Zheng Z M, Xie B M, Liu Y K, Zhang D L. 1969. Hydro-elastoplasticity approach to analysingunderground nuclear explosion and several results. [Research report]. Beijing: Institute of Mechanics, Chinese Academyof Science (in Chinese))
    [89]
    郑哲敏. 1973a. 破甲初步分析及一些基础知识. 力学情报, 24: 36-74 (Zheng Z M. 1973a. Preliminary analysis and somebasic theory on armor penetration. Mechanical Intelligence, 24: 36-74 (in Chinese))
    [90]
    郑哲敏. 1973b. 破甲初步分析及一些基础知识(续). 力学情报, 4: 67-98 (Zheng Z M. 1973b. Preliminary analysis andsome basic theory on armor penetration (continued). Mechanical Intelligence, 4: 67-98 (in Chinese))
    [91]
    郑哲敏, 高举贤, 谈庆明, 孙庚辰,乔敏,周一以. 1974. 聚能射流侵彻过程模型律. 力学, 1: 1-10 (Zheng Z M, Gao J XTang Q M, Sun G C,Qiao M, Zhou Y Y. 1974. Scaling law in the penetration process of shaped charge jet. Mechanics,1: 1-10 (in Chinese))
    [92]
    郑哲敏, 谈庆明. 1977. 破甲机理的力学分析与简化模型(631破甲机理课题研究进展报告). 科技参考资料, 6: 108-164 (ZhengZ M, Tan Q M. 1977. Mechanical analysis and simplified model of armor penetration mechanism (631 Research progressreport of the armor penetration project). Science and Technology Reference Material, 6: 108-164 (in Chinese))
    [93]
    郑哲敏. 1980. 关于射流侵彻的几个问题, 兵工学报, 1: 13-22 (Zheng Z M. 1980. Several problems on jetpenetration. Acta Armamentarii, 1: 13-22 (in Chinese))
    [94]
    郑哲敏. 1981.聚能射流的稳定性问题. 爆炸与冲击, 1: 6-17 (Zheng Z M. 1981. Stability of jet produced by shapedcharge. Explosion and Shock Waves, 1: 6-17 (in Chinese))
    [95]
    郑哲敏, 杨振声. 1981. 爆炸加工. 北京: 国防工业出版社 (Zheng Z M, Yang Z S. 1981. Explosion Processing. Beijing:National Defense Industry Press (in Chinese))
    [96]
    郑哲敏. 1982a. 从数量级和量纲分析看煤与瓦斯突出的机理. 见: 力学与生产建设, 北京: 北京大学出版社, 128-137 (ZhengZ M. 1982a. The mechanisms of coal and gas outburst from the and dimensional analysis. in: Mechanics and ProductionConstruction. Beijing: Beijing University Press, 128-137 (in Chinese))
    [97]
    郑哲敏. 1982b. 连续介质力学与断裂. 力学进展, 12: 133-140 (Zheng Z M. 1982b. Continuum mechanics and fracture.Advances in Mechanics, 12: 133-140 (in Chinese))
    [98]
    郑哲敏, 杨振声, 金镠. 1989. 爆炸法处理水下海淤软基. 见: 郑哲敏文集. 北京: 科学出版社 (Zheng Z M, Yang Z S, JinL. 1989. Dispose soft sea ooze base by blasting. Collected Works of Zhe-Min Zheng. Beijing: Science Press (in Chinese))
    [99]
    郑哲敏, 陈力, 丁雁生. 1993. 一维瓦斯突出破碎阵面的恒稳推进. 中国科学, 23: 377-384 (Zheng Z M, Chen L, Ding Y S.1993. Steady advancing of fracture front in one-dimensional gas outburst. Science China, 23: 377-384 (inChinese))
    [100]
    郑哲敏, 谈庆明. 1996. 相似理论与模化. 见:《中国机械工程手册》第3篇. 北京: 机械工业出版社 (Zheng Z M, Tan Q M.1996. Similarity theory and model. in: Chinese Mechanical Engineering Handbook, Section 3. Beijing: China Machine Press(in Chinese))
    [101]
    郑哲敏. 1995. 谈谈应用力学. 力学与实践, 17: 1-4.(Zheng Z M. 1995. A talk about applied mechanics,Mechanics and Aprctice, 17: 1-4 (in Chinese))
    [102]
    郑哲敏, 周恒, 张涵信, 黄克智, 白以龙. 1995. 21世纪初的力学发展趋势. 力学进展, 25: 433-441 (Zheng Z M, Zhou H,Zhang H X, Huang K Z, Bai Y L. 1995. Trends of development in mechanics in the early 21st century.Advances in Mechanics, 25: 433-441 (in Chinese))
    [103]
    郑哲敏. 2001. 学习钱学森先生技术科学思想的体会. 力学进展, 31: 484-488 (Zheng Z M. 2001. About the ideas of H STsien ontechnological sciences. Advances in Mechanics, 31: 484-488 (in Chinese)
    [104]
    郑哲敏. 2004. 郑哲敏文集. 北京: 科学出版社 (Zheng Z M. 2004. Collected Works of Zhe-Min Zheng. Beijing: SciencePress (in Chinese))
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