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1991 Vol. 21, No. 2

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1991, 21(2): . doi: 10.6052/1000-0992-1991-2-J1991-019
Abstract(1800) PDF(708)
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1991, 21(2): . doi: 10.6052/1000-0992-1991-2-J1991-033
Abstract(997) PDF(479)
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1991, 21(2): . doi: 10.6052/1000-0992-1991-2-J1991-034
Abstract(963) PDF(484)
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THE FOUNDATION OF NONEQUILIBRIUM STATISTICAL FRACTURE MECHANICS
1991, 21(2): 153-168. doi: 10.6052/1000-0992-1991-2-J1991-020
Abstract(1751) PDF(745)
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Based on microcrack evolution equation and combined with the microcrack growth rale and the nuclealion rale obtained from microscopic mechanism and the principle of the minimum strength,the microcrack distribution function, fracture probabilily, reliability, failure rate, kinetic equation of damage-fracture, statistical distribution function and statistical average value of various fracture-related macromechanical quantities such as strength, toughness and life etc arc derived in a unified fashion. This the...
1991, 21(2): 157-157. doi: 10.6052/1000-0992-1991-2-J1991-022
Abstract(1229) PDF(604)
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COMPUTER SIMULATIONS OF MECHANICAL PROPERTIES OF THE GRAIN BOUNDARY OF METALS
1991, 21(2): 169-175. doi: 10.6052/1000-0992-1991-2-J1991-021
Abstract(1767) PDF(630)
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The computer simulation methods based upon interatomic interactions and their successful applications to the studies on the grain boundaries of metals are briefly introduced. As examples, the formation of grain boundary,its relaxed structure, impurity segregation and the vacancy migration are discussed. In addition, the limitations of these simulation methods are reviewed.
THE REAL EQUATION OF STATE OF MATERIALS IN EXPLOSION AND SHOCK
1991, 21(2): 176-189. doi: 10.6052/1000-0992-1991-2-J1991-023
Abstract(2345) PDF(702)
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The real equation of state of materials is different from that of metals in the computation of explosion mechanics,due to its complicated material construction. The paper places the emphasis on the description of the real equation of state of materials. In terms of the physical mechanics and the semi-empirical-semi-theoretical method the description can be made as follows: 1) The equation of state is derived from the usual thermodynamics method, and some parameters are calculated with the help of experiment...
THE PROGRESS IN DEFORMATION MECHANICS OF ALLOY WITH TWO DUCTILE PHASES
1991, 21(2): 190-207. doi: 10.6052/1000-0992-1991-2-J1991-024
Abstract(1660) PDF(650)
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The progress in deformation mechanics of alloy with two ductile phases widely used in the industrial production is reviewed in the paper. Developments and applications of mixture law describing strength of fibre composite materials in the dual phase steels are introduced, Mileiko's theory based on assuming equal strain in both phases, model for stress-distribution in both phases, continuum model based on assuming strain-distribution in both phases and micfo-mechanics model based dislocation theory as well a...
MECHANICS CONCEPTS IN THE CRACK ARREST DESIGN
1991, 21(2): 208-218. doi: 10.6052/1000-0992-1991-2-J1991-025
Abstract(2463) PDF(675)
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The crack arrest control design method based on the dynamic fracture mechanics as a complement of the crack initiation control design method has taken shape gradually in the last more than ten years. In this paper, the outline of this new fracture control design method and its main mechanics concepts have been discussed.
DOUBLE-DIFFUSIVE CONVECTION AND CRYSTAL GROWTH
1991, 21(2): 219-225. doi: 10.6052/1000-0992-1991-2-J1991-026
Abstract(2566) PDF(598)
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The concept of double-diffusive convection and its effect on crystal growth are introduced.Double-diffusive covection is a special kind of convection which may occur in a statically stable system of fluid. In some cases of crystal growth, there exist conditions for developing double-diffusive convection. Theories of crystal growth which ignore the effect of double-diffusive convection may lead to obvious deviation from reality. The existing numerical results of crystal growth process coupling with double di...
RECENT DEVELOPMENT ON FROST ACTION STUDY OF SOILS
1991, 21(2): 226-235. doi: 10.6052/1000-0992-1991-2-J1991-027
Abstract(1605) PDF(719)
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About two thirds of total area in China are located in the seasonally frost and permafrost regions. The physico-mechanical properties of soils in the regions will be changed frequently due to the periodic variation of climate which makes engineering projects suffer heavy frost damage. Consequently, the mechanics of frost action, as a branch of mechanics, has been developing quickly since the early of this century. In this paper, the development of frost action mechanics in China in last 30 years is reviewed...
1991, 21(2): 236-244. doi: 10.6052/1000-0992-1991-2-J1991-028
Abstract(1462) PDF(621)
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1991, 21(2): 245-261. doi: 10.6052/1000-0992-1991-2-J1991-029
Abstract(1563) PDF(654)
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1991, 21(2): 262-263. doi: 10.6052/1000-0992-1991-2-J1991-030
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1991, 21(2): 264-270. doi: 10.6052/1000-0992-1991-2-J1991-031
Abstract(1329) PDF(609)
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1991, 21(2): 271-271. doi: 10.6052/1000-0992-1991-2-J1991-032
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