Geotechnical stability analyses based on classical continuum may lead to remarkable underestimations on geotechnical safety.To attain better estimations on geotechnical stability,the micro-polar continuum is employed ...Geotechnical stability analyses based on classical continuum may lead to remarkable underestimations on geotechnical safety.To attain better estimations on geotechnical stability,the micro-polar continuum is employed so that its internal characteristic length(lc)can be utilized to model the shear band width.Based on two soil slope examples,the role of internal characteristic length in modeling the shear band width of geomaterial is investigated by the second-order cone programming optimized micro-polar continuum finite element method.It is recognized that the underestimation on factor of safety(FOS)calculated from the classical continuum tends to be more pronounced with the increase of lc.When the micro-polar continuum is applied,the shear band dominated by lc is almost kept unaffected as long as the adopted meshes are fine enough,but it does not generally present a slip surface like in the cases from the classical continuum,indicating that the micro-polar continuum is capable of capturing the non-local geotechnical failure characteristic.Due to the coupling effects of lc and strain softening,softening behavior of geomaterial tends to be postponed.Additionally,the bearing capacity of a geotechnical system may be significantly underestimated,if the effects of lc are not modeled or considered in numerical analyses.展开更多
The Igbo language has grown and developed to what is known as Standard Igbo （Igbo Izugbe） today. Series of efforts have gone into the modification and invention of words to ensure wider acceptability and intelligibi...The Igbo language has grown and developed to what is known as Standard Igbo （Igbo Izugbe） today. Series of efforts have gone into the modification and invention of words to ensure wider acceptability and intelligibility While this is a welcome idea, the tendency of the loss of communal identity in terms of the original local variety of the Igbo Language spoken by each community becomes very obvious. As Igbos can easily distinguish an Anambra man from an Imo man, it is also necessary that within Arlambra, one should be able to locate a particular town in the area through the spoken Igbo Language variety. This paper studies some of these local variants and advocates for a method of preserving such rich cultural heritage which are so valuable for posterity展开更多
基金Projects(2017YFC0804602,2017YFC0404802)supported by the National Key R&D Program of ChinaProject(2019JBM092)supported by the Fundamental Research Funds for the Central Universities,China。
文摘Geotechnical stability analyses based on classical continuum may lead to remarkable underestimations on geotechnical safety.To attain better estimations on geotechnical stability,the micro-polar continuum is employed so that its internal characteristic length(lc)can be utilized to model the shear band width.Based on two soil slope examples,the role of internal characteristic length in modeling the shear band width of geomaterial is investigated by the second-order cone programming optimized micro-polar continuum finite element method.It is recognized that the underestimation on factor of safety(FOS)calculated from the classical continuum tends to be more pronounced with the increase of lc.When the micro-polar continuum is applied,the shear band dominated by lc is almost kept unaffected as long as the adopted meshes are fine enough,but it does not generally present a slip surface like in the cases from the classical continuum,indicating that the micro-polar continuum is capable of capturing the non-local geotechnical failure characteristic.Due to the coupling effects of lc and strain softening,softening behavior of geomaterial tends to be postponed.Additionally,the bearing capacity of a geotechnical system may be significantly underestimated,if the effects of lc are not modeled or considered in numerical analyses.
文摘The Igbo language has grown and developed to what is known as Standard Igbo （Igbo Izugbe） today. Series of efforts have gone into the modification and invention of words to ensure wider acceptability and intelligibility While this is a welcome idea, the tendency of the loss of communal identity in terms of the original local variety of the Igbo Language spoken by each community becomes very obvious. As Igbos can easily distinguish an Anambra man from an Imo man, it is also necessary that within Arlambra, one should be able to locate a particular town in the area through the spoken Igbo Language variety. This paper studies some of these local variants and advocates for a method of preserving such rich cultural heritage which are so valuable for posterity
