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This book collects the theoretical derivation of a recently presented general variational macroscopic continuum theory of multiphase poroelasticity (VMTPM), together with its applications to consolidation and stress partitioning problems of interest in several applicative engineering contexts, such as in geomechanics and biomechanics. The theory is derived based on a purely-variational deduction, rooted in the least-Action principle, by considering a minimal set of kinematic descriptors. The treatment herein considered keeps a specific focus on the derivation of most general medium-independent governing equations. It is shown that VMTPM recovers paradigms of consolidated use in multiphase poroelasticity such as Terzaghi's stress partitioning principle and Biot's equations for wave propagation. In particular, the variational treatment permits the derivation of a general medium-independent stress partitioning law, and the proposed variational theory predicts that the external stress, the fluid pressure, and the stress tensor work-associated with the macroscopic strain of the solid phase are partitioned according to a relation which, from a formal point of view, turns out to be strictly compliant with Terzaghi's law, irrespective of the microstructural and constitutive features of a given medium. Moreover, it is shown that some experimental observations on saturated sandstones, generally considered as proof of deviations from Terzaghi's law, are ordinarily predicted by VMTPM. As a peculiar prediction of VMTPM, the book shows that the phenomenon of compression-induced liquefaction experimentally observed in cohesionless mixtures can be obtained as a natural implication of this theory by a purely rational deduction. A characterization of the phenomenon of crack closure in fractured media is also inferred in terms of macroscopic strain and stress paths. Altogether the results reported in this monograph exemplify the capability of VMTPM to describe and predict a large class of linear and nonlinear mechanical behaviors observed in two-phase saturated materials.
New Public Management and the Reform of Education addresses complex and dynamic changes to public services by focusing on new public management as a major shaper and influencer of educational reforms within, between and across European nation states and policy actors. The contributions to the book are diverse and illustrate the impact of NPM locally but also the interplay between local and European policy spheres. The book offers: A critical overview of NPM through an analysis of debates, projects and policy actors A detailed examination of NPM within 10 nation states in Europe A robust engagement with the national and European features of NPM as a policy strategy The book actively contributes to debates and analysis within critical policy studies about the impact and resilience of NPM, and how through a study of educational reforms in a range of political systems with different traditions and purposes a more nuanced and complex picture of NPM can be built. As such the book not only speaks to educational researchers and professionals within Europe but also to policymakers, and can inform wider education and policy communities internationally.
This book collects the theoretical derivation of a recently presented general variational macroscopic continuum theory of multiphase poroelasticity (VMTPM), together with its applications to consolidation and stress partitioning problems of interest in several applicative engineering contexts, such as in geomechanics and biomechanics. The theory is derived based on a purely-variational deduction, rooted in the least-Action principle, by considering a minimal set of kinematic descriptors. The treatment herein considered keeps a specific focus on the derivation of most general medium-independent governing equations. It is shown that VMTPM recovers paradigms of consolidated use in multiphase poroelasticity such as Terzaghi's stress partitioning principle and Biot's equations for wave propagation. In particular, the variational treatment permits the derivation of a general medium-independent stress partitioning law, and the proposed variational theory predicts that the external stress, the fluid pressure, and the stress tensor work-associated with the macroscopic strain of the solid phase are partitioned according to a relation which, from a formal point of view, turns out to be strictly compliant with Terzaghi's law, irrespective of the microstructural and constitutive features of a given medium. Moreover, it is shown that some experimental observations on saturated sandstones, generally considered as proof of deviations from Terzaghi's law, are ordinarily predicted by VMTPM. As a peculiar prediction of VMTPM, the book shows that the phenomenon of compression-induced liquefaction experimentally observed in cohesionless mixtures can be obtained as a natural implication of this theory by a purely rational deduction. A characterization of the phenomenon of crack closure in fractured media is also inferred in terms of macroscopic strain and stress paths. Altogether the results reported in this monograph exemplify the capability of VMTPM to describe and predict a large class of linear and nonlinear mechanical behaviors observed in two-phase saturated materials.
New Public Management and the Reform of Education addresses complex and dynamic changes to public services by focusing on new public management as a major shaper and influencer of educational reforms within, between and across European nation states and policy actors. The contributions to the book are diverse and illustrate the impact of NPM locally but also the interplay between local and European policy spheres. The book offers: A critical overview of NPM through an analysis of debates, projects and policy actors A detailed examination of NPM within 10 nation states in Europe A robust engagement with the national and European features of NPM as a policy strategy The book actively contributes to debates and analysis within critical policy studies about the impact and resilience of NPM, and how through a study of educational reforms in a range of political systems with different traditions and purposes a more nuanced and complex picture of NPM can be built. As such the book not only speaks to educational researchers and professionals within Europe but also to policymakers, and can inform wider education and policy communities internationally.
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