Auteur Xi, Yunping
Documents disponibles écrits par cet auteur (13)
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Article : texte imprimé
Walters, Matthew C., Auteur ; Glaucio H. Paulino, Auteur ; Dodds Jr., Robert H. ; Xi, Yunping, Éditeur scientifique |This Work applies a two state interaction integral to obtain stress intensity factors along cracks in three dimensional functionally graded materials. The Procedures are applicable to planar cracks with curved fronts under mechanical loading, in[...]
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Xi, Yunping, Auteur ; Eskandari-Ghadi, Morteza, Auteur ; Suwito ; Sture, Stein ; Christian Hellmich, Éditeur scientifique |A new theory of composite damage mechanics is developed. A material with damage is considered as a composite comprised of two different phases (called matrix and inclusion). Both phases are linearly elastic isotropic materials. The matrix is con[...]
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De Oliveira e Sousa, José Luiz, Auteur ; Gettu, Ravindra, Auteur ; Xi, Yunping, Éditeur scientifique |The Determination of the fundamental stress versus crack opening (σ-w) response of concrete under unixial tension is performed in this study through inverse analysis using data from notched beam tests. The Procedure used for optimizing the param[...]
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Fan, Mizi, Auteur ; Diwoodie, John, Auteur ; Enjily, Vahik ; Xi, Yunping, Éditeur scientifique |The effect of size and the combined effect of the size and moisture sorption of test pieces on the long term creep behavior of wood composites were studied. Small-, wide-, and semisize test pieces from each of three commercial wood composites, p[...]
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Shodja, Hossein M., Auteur ; Roumi, Farshid, Auteur ; Xi, Yunping, Éditeur scientifique |A micromechanical approach for an accurate estimation of the effective moduli of composites reinforced with nondilute distribution of coated particles is developed. The theory is based on the extension of the equivalent inclusion method to inter[...]
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Wang, Jialai, Auteur ; Qiao, Pizhong, Auteur ; Xi, Yunping, Éditeur scientifique |Based on a novel split bi-layer shear deformable beam model capable of capturing the local deformation at the crack tip, the explicit closed-form solutions of bi-material interface fracture are presented in this paper. A Recently developed novel[...]
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Puntel, Eric, Auteur ; Bolzon, Gabriella, Auteur ; Saouma, Victor E. ; Xi, Yunping, Éditeur scientifique |A generalized interface model for joints and cracks in quasi-brittle materials is formulated. The proposed model marries an existing fracture mechanics based one developed for monotonic loading of concrete with another frictional based model de[...]
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Leukart, Michael, Auteur ; Ramm, Ekkehard, Auteur ; Xi, Yunping |The Present paper addresses the so-called microplane formulation which became recently more and more popular for the description of quasi-brittle materials. The Essential feature of this material formulation is a split of the local microplane st[...]
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Beghini, Alessandro, Auteur ; Zdenek P. Bazant, Auteur ; Zhou, Yong ; Gouirand, Olivier ; Caner, Ferhun C. ; Xi, Yunping, Éditeur scientifique |Despite impressive advances, the existing constitutive and fracture models for fiber-reinforced concrete (FRC) are essentially limited to uniaxial loading. The microplane modeling approach, which has already been successful for concrete, rock, c[...]
Article : texte imprimé
Jaesung Lee, Auteur ; Xi, Yunping, Auteur ; Kaspar Willam, Auteur |In this paper, the thermal degradation of modulus of elasticity of concrete is modeled by composite mechanics at three scales of observation: (a) at the level of concrete, (b) at the level of mortar, and (c) the cement paste level. At the latter[...]
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Ghassemi, A., Auteur ; Q. Zhang, Auteur ; Xi, Yunping, Éditeur scientifique |Thermal induced volumetric changes in rock result in pore pressure variations, and lead to a coupling between the termal and poro mechanical processes. This Paper examines the response of a fracture in porothermoelastic rock when subjected to st[...]
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Zdenek P. Bazant, Auteur ; Qiang Yu, Auteur ; Xi, Yunping, Éditeur scientifique |The effect of V-notches (or reentrant corners) on fracture propagation has been analyzed for brittle materials, but not for quasi—brittle materials such as concrete, marked by a large material characteristic length producing a strong size effect[...]
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Oh, Byung Hwan, Auteur ; Kim, Eui Sung, Auteur ; Choi, Young Cheol ; Xi, Yunping, Éditeur scientifique |The realistic design of pretensioned prestressed concrete members requires adequate determination of transfer length for prestress forces. The purpose of the present paper is to propose a rational theory, which can evaluate the transfer lengths [...]
