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Browsing by Subject "Strain"

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    • Article  

      Application of the p-version of the finite element method to elastoplasticity with localization of deformation 

      Jeremić, B.; Xenophontos, Christos A. (1999)
      In this paper we discuss the use of the p-version of the finite element method applied to elastoplastic problems that exhibit sharp (but continuous) deformation gradients. The deformation theory of deviatoric, linearly ...

    • Article  

      Determining true material constants of semisolid slurries from rotational rheometer data 

      Alexandrou, Andreas N.; Georgiou, Georgios C.; Economides, Eva Athena; Modigell, M. (2016)
      In this work we revisit the issue of obtaining true material constants for semisolid slurries. Therefore, we consider the circular Couette flow of Herschel-Bulkley fluids. We first show how true constants can be obtained ...

    • Article  

      Determining true material constants of semisolid slurries from rotational rheometer data 

      Alexandrou, Andreas N.; Georgiou, G. C.; Economides, E. A.; Modigell, M. (2016)
      In this work we revisit the issue of obtaining true material constants for semisolid slurries. Therefore, we consider the circular Couette flow of Herschel-Bulkley fluids. We first show how true constants can be obtained ...

    • Article  

      Double Networks Based on Amphiphilic Cross-Linked Star Block Copolymer First Conetworks and Randomly Cross-Linked Hydrophilic Second Networks 

      Rikkou-Kalourkoti, Maria D.; Kitiri, E. N.; Patrickios, Costas S.; Leontidis, Epameinondas; Constantinou, Martha; Constantinides, G.; Zhang, X. K.; Papadakis, Christine M. (2016)
      This study presents the preparation and characterization of double networks (DN) based on a first amphiphilic polymethacrylate conetwork (APCN) and a second polyacrylamide network. The APCN first network comprised ...

    • Article  

      Double-networks based on pH-responsive, amphiphilic "core-first" star first polymer conetworks prepared by sequential RAFT polymerization 

      Kitiri, E. N.; Patrickios, C. S.; Voutouri, C.; Stylianopoulos, T.; Hoffmann, I.; Schweins, R.; Gradzielski, M. (2017)
      This manuscript presents the preparation and study of a new double-network hydrogel system, comprising an amphiphilic, pH-responsive first polymer conetwork synthesized via reversible addition-fragmentation chain transfer ...

    • Article  

      Double-networks based on pH-responsive, amphiphilic "core-first" star first polymer conetworks prepared by sequential RAFT polymerization 

      Kitiri, E. N.; Patrickios, Costas S.; Voutouri, Chrysovalantis; Stylianopoulos, Triantafyllos; Hoffmann, I.; Schweins, R.; Gradzielski, M. (2017)
      This manuscript presents the preparation and study of a new double-network hydrogel system, comprising an amphiphilic, pH-responsive first polymer conetwork synthesized via reversible addition-fragmentation chain transfer ...

    • Article  

      Geometrically strained carbenes: Interdependence among geometry, spin multiplicity and reactivity 

      Takahashi, Y.; Nicolaïdes, Andrew N.; Tomioka, H. (2001)
      The singlet and triplet states of cyclobutenylidene 1 and benzocyclobutenylidene 2 have been studied computationally (using ab initio and DFT methods) in order to assess the effect of angle strain on the S-T gap of vinyl- ...

    • Conference Object  

      A mechanistic approach in defining inelastic rotation capacity of RC columns 

      Megalooikonomou, K. G.; Pantazopoulou, Stavroula J.; Tastani, S. P. (National Technical University of Athens, 2017)
      When a reinforced concrete (RC) column is subjected to lateral sway as a result of earthquake action, the large strain demand in the end sections is supported by development of strains in the anchorage. This causes the ...

    • Article  

      On shear deformable beam theories: The frequency and normal mode equations of the homogeneous orthotropic bickford beam 

      Soldatos, Kostas P.; Sophocleous, Christodoulos (2001)
      This paper provides a step forwards the construction and documentation of the frequency equations and the characteristic functions of a general three-degrees-of-freedom theory that describes the plane motion of shear ...

    • Article  

      Synthesis and characterization of robust double-networks based on end-linked, pH-responsive first networks 

      Kitiri, Elina N.; Rikkou-Kalourkoti, Maria D.; Sophocleous, Manolia; Patrickios, Costas S. (2015)
      Abstract Fragile, end-linked hydrophilic tertiary amine based methacrylate (first) networks were mechanically reinforced using the double-network principle, via the introduction of a polyacrylamide second network. Reinforcement ...

    • Article  

      Uniaxial and biaxial mechanical behavior of human amnion 

      Barocas, V. Η; Oyen, M. L.; Cook, R. F.; Stylianopoulos, T.; Calvin, S. E.; Landers, D. V. (2005)
      Chorioamnion, the membrane surrounding a fetus during gestation, is a structural soft tissue critical for maintaining a successful pregnancy and delivery. However, the mechanical behavior of this tissue membrane is poorly ...

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