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Science China(Physics,Mechanics & Astronomy) 2011年第2期54卷 296-302页

作者： YANG Zhong ZHANG BoMing ZHAO Lin SUN XinYang Center for Composite Materials. Harbin Institute of Technology. Harbin 150001. China School of Materials Science and Engineering. Beihang University. Beijing 100191. China

A shear-lag model is applied to study the stress transfer around a broken fiber within unidirectional fiber-reinforced composites(FRC) subjected to uniaxial tensile loading along the fiber *** matrix damage and interfacial debonding,which are the main failure modes,are considered in the *** maximum stress criterion with the linear damage evolution theory is used for the *** slipping friction stress is considered in the interfacial debonding region using Coulomb friction theory,in which interfacial clamping stress comes from radial residual stress and mismatch of Poisson's ratios of constituents(fiber and matrix).The stress distributions in the fiber and matrix are obtained by the shear-lag theory added with boundary conditions,which includes force continuity and displacement compatibility constraints in the broken and neighboring intact *** result gives axial stress distribution in fibers and shear stress in the interface and compares the theory reasonably well with the measurement by a polarized light *** relation curves between damage,debonding and ineffective region lengths with external strain loading are obtained.

关键词： stress transfer shear-lag damage evolution fiber composite

Investigation of Coulomb stress changes in south Tibet(central Himalayas) due to the 25th April 2015 M_W 7.8 Nepal earthquake using a Coulomb stress transfer model

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Earthquake Science 2016年第5期29卷 271-279页

作者： Xu Cheng Guojie Meng Institute of Earthquake Science China Earthquake Administration

After Mw 7.8 Nepal earthquake occurred, the rearrangement of stresses in the crust commonly leads to subsequent damaging earthquakes. We present the calculations of the coseismic stress changes that resulted from the 25th April event using models of regional faults designed according to south Tibet-Nepal structure, and show that some indicative significant stress increases. We calculate static stress changes caused by the displacement of a fault on which dislocations happen and an earthquake occurs. A Mw 7.3 earthquake broke on 12 May at a distance of - 130 km SEE of the Mw 7.8 earthquake, whose focus roughly located on high Coulomb stress change （CSC） site. Aftershocks （first 15 days after the mainshock） are associated with stress increase zone caused by the main rupture. We set receiver faults with specified strikes, dips, and rakes, on which the stresses imparted by the source fault are resolved. Four group normal faults to the north of the Nepal earthquake seismogenic fault were set as receiver faults and variant results followed. We provide a discussion on Coulomb stress transfer for the seismogenic fault, which is useful to identify potential future rupture zones.

关键词： Coulomb stress changes Elastic model stress transfer Earthquake risk Nepal earthquake

On stress-forecasting strategy of earthquakes from stress buildup,stress shadow and stress transfer(SSS) based on numerical approach

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Earthquake Science 2009年第1期22卷 53-62页

作者： Chunan Tang Tianhui Ma Xiaoli Ding Center for Rock Instability and Seismicity Research Northeastern University Shenyang China Department of Land Surveying and Geo-Informatics Hong Kong Polytechnic University Kowloon Hong Kong China

Global Positioning System （GPS） and Interferometric Synthetic Aperture Radar （InSAR）, used for monitoring crust deformation, are found to be very promising in earthquake prediction subject to stress-forecasting. However, it is recognized that unless we can give reasonable explanations of these curious precursory phenomena that continue to be serendipitously observed from time to time, such high technology of GPS or InSAR is difficult to be efficiently used. Therefore, a proper model revealing the relation between earthquake evolution and stress variation, such as the phenomena of stress buildup, stress shadow and stress transfer （SSS）, is crucial to the GPS or InSAR based earthquake prediction. Here we address this question through a numerical approach of earthquake development using an intuitive physical model with a map-like configuration of discontinuous fault system. The simulation provides a physical basis for the principle of stress-forecasting of earthquakes based on SSS and for the application of GPS or InSAR in earthquake prediction. The observed SSS associated phenomena with images of stress distribution during the failure process can be continuously simulated. It is shown that the SSS are better indicators of earthquake precursors than that of seismic foreshocks, suggesting a predictability of earthquakes based on stress-forecasting strategy.

关键词： stress-forecasting earthquake stress buildup stress shadow stress transfer

stress transfer and the Impact of the India-Eurasia Collision and the Western Pacific Subduction on the Geodynamics of the Asian Continent

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Open Journal of Earthquake Research 2022年第4期11卷 73-88页

作者： Victor. G. Bykov Tatyana V. Merkulova Kosygin Institute of Tectonics and Geophysics Far East Branch Russian Academy of Sciences Khabarovsk Russia

The interaction between the India-Eurasia collision and the Western Pacific subduction and their contribution to recent geodynamics of the Asian continent are discussed. We perform a comparative analysis of the data available from world literature and new data on the slow strain and earthquake migration from the India-Eurasia collision and the Western Pacific subduction zones. Based on the concepts of wave dynamics of the deformation processes, a localization scheme is constructed illustrating the migration of slow strain fronts in central and eastern Asia, and the wave geodynamic impact of collision and subduction on the Asian continent is shown.

关键词： stress transfer Earthquake Migration Slow Strain Fronts Geodynamics India-Eurasia Collision Western Pacific Subduction

Effects of Matrix Features on stress transfer of Short Fiber Composites

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Journal of Modern Transportation 1998年第2期15卷 59-64页

作者：康国政高庆刘世楷

By employing the elastic and elastic plastic finite element method(FEM), the effects of matrix feature on the stress transfer mechanisms of short fiber composites are studied. In the calculation, the variations in matrix modulus, yield strength and hardening modulus are considered. It is concluded that large deformation of matrix is harmful to the improvement of the mechanical performances of the composites.

关键词： short fiber composites matrix features stress transfer FEM

The Effects of Interfaces on stress transfer in Short Fiber Reinforced Metal Matrix Composites

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Journal of Modern Transportation 1998年第1期15卷 48-53页

作者：康国政高庆刘世楷

In this paper, the effects of interface properties on the stress transfer between matrix and fiber in short fiber reinforced metal matrix composites (SFRMMCs) is studied with the method of the elasto plastic finite element. The interface properties include Young’s modulus, thickness and elasto plastic performances. In the calculation an interfacial layer with given thickness is introduced into the single fiber model. It is shown that, for a soft interface, the variation in interfacial properties influences the stress transfer greatly.

关键词： metal matrix composites interface stress transfer finite element method

CONCEPTS OF MECHANICAL PARAMETERS transfer IN SOLID MEDIUM AND ITS APPLICATION IN ENGINEERINGS

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Applied Mathematics and Mechanics(English Edition) 2004年第2期25卷 143-151页

作者：赵晓兵薛大为赵玉祥周丰峻 Engineering Institute of Engineering Corps of PLA University of Macao C.Postal 3001 Luoyang Hydraulic Engineering Technology Institute

Based on investigation into four aspects of qualitative mechanical analysis, principle model experiments, engineering dynamic load tests and numerical calculation, it was discussed that the transfer of stresses and accelerations in stratum medium have a close relation with its relative rigidity. The concepts of stresses and accelerations transfer in solid medium and its corresponding generalized, composite structure system are presented. The survivability of underground engineerings and protective engineering will be greatly increased if these concepts are correctly used in construction.

关键词： stress transfer relative rigidity composite structure soft backfill

Investigation on the Effect of the Multilayered Porous Structure of Sea Urchin Skeleton on Its Mechanical Behavior

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Journal of Bionic Engineering 2020年第3期17卷 469-483页

作者： Hui Yu Jianbao Li Zhenhao Hou Jianlin Li Yongjun Chen Chunfu Lin School of Materials and Chemical Engineering Pingxiang UniversityPingxiang 337055China State Key Laboratory of Marine Resource Utilization in South China Sea College of Materials&Chemical EngineeringHainan UniversityHaikou 570228China

In this paper,the effect of stereom structure on the mechanical behavior of the Sea Urchin Inorganic Skeleton(SUIS)has been *** stereom microstructure of both Anthocidaris crassispina and Tripnenstes gratilla was characterized by Scanning Electron Microscopy(SEM).Results indicate that a three-layer porous structure consisting of a growth,a support,and a resorption(GSR)layer is a common denominator for both *** effect of GSR layer order on the mechanical behavior of the SUIS was studied by a finite element *** results show that the GSR model could effectively reduce the maximum tensile stress on its meridional sutures under unidirectional pressure,hydrostatic pressure,and self-weight *** a fabricated three-layered ceramic test strips with different layer orders,the mechanical properties have a completely opposite performance compared with the compressive properties of the calculated SUIS-Iike *** indicates that the GSR structure can effectively improve the mechanical properties of the SUIS,but it cannot be applied to bionics without considering its synergistic effect with the macro-structure of the *** is a typical example of bionic invalidation by single structure,where multi-level structure bionics may be an effective solution.

关键词： porous multilayered structure finite element analysis stress transfer mechanical properties sea urchin test

Source of the 2019 M_(W)6.9 Banten Intraslab earthquake modelled with GPS data inversion

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Geodesy and Geodynamics 2021年第4期12卷 308-314页

作者： Satrio Muhammad Alif Erlangga Ibrahim Fattah Munawar Kholil Ongky Anggara Geomatics Engineering Institut Teknologi SumateraIndonesia Geophysics Engineering Institut Teknologi SumateraIndonesia Geospatial Information Agency Indonesia

The 2019 M_(W)6.9 Banten Intraslab earthquake occurred at~100 km to the northeast of the Sunda Trench with two nodal plane models estimated by the Global Centroid-Moment-Tensor(GCMT)Project with a strike of 200°and a dip of 65°.Continuous GPS data from 11 GPS sites were used to model the source of the earthquake in *** coseismic displacements and its uncertainties are obtained from the coordinates of these GPS sites from 7 days before to 7 days after the *** coseismic slip is the inversion result of those displacements based on the best fit in an elastic *** maximum displacement is~5 cm with a large uncertainty that is comparable to the amplitude of displacement.A seismic moment of the best model(strike of 65°and dip of 54°)is 2.79×10^(19) Nm or equivalent to M_(W)*** fault model of the earthquake is highly presumed as a continuation of Sumatran Fault Zone.

关键词： Coseismic slip Intraslab earthquake GPS data Sunda strait stress transfer

A STUDY OF INTERFACES OF COMPOSITES BY MEANS OF OPTICAL FIBRE SENSING TECHNTIQUE

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Journal of Wuhan University of Technology(Materials Science) 1992年第4期7卷 1-10页

作者：闻荻江孙成林周崇华 Department of Material Science Wuhan University of Technology

Fibre stress of glass fibre reinforced polymeric copmosites on load is determined by using optical fibre as model fiber and by means of laser interference method. In addition, the origination of fibre stress during moulding process of composites and the relation between fiber stress of loaded composites and external stress are examined. The experiments show that fibre stress is related to molecular structure of inter facial materials and structure of inter facial layers. When stress is transferred from matrix to fibre, each inter facial layer has different stress gradient and deformability. This property can be characterized by introducing an inter facial stress transfer coefficient k to the two-phase model.

关键词： interface composites stress transfer optical fibre laser interference method