Sökning: "Constitutive equation"
Visar resultat 1 - 5 av 25 avhandlingar innehållade orden Constitutive equation.
1. Nonlinear micromechanics of open-cell cellular solids
Sammanfattning : An approach for modelling the response of open-cell cellular solids at finite strainsis developed. The model framework comprises a mechanistic formulation wherethe cellular solid is considered as a network of struts, each connecting two vertexpoints. LÄS MER
2. On the local properties of compressible filter cakes
Sammanfattning : Filtration as a means of separating solids from liquids is an important unit operation employed in a range of different industrial sectors, of which the forest products, mineral, chemical process and pharmaceutical industries are but a few. Accurate and applicable models for the filtration unit operation are imperative if industrial filtration equipment is to be designed correctly. LÄS MER
3. Continuum modelling of the mechanical response of paper-based materials
Sammanfattning : Continuum based elasto-plastic-damage models for paperboard have been established in this work. The thesis begins with an introductory section that describes the mechanical properties of paperboard and some of the converting processes during forming of a package. LÄS MER
4. Constitutive equations for concrete materials subjected to high rate of loading
Sammanfattning : Continuum mechanics is used to model the mechanical behaviour of concrete structures subjected to high rates of loading in defence applications. Large deformation theory is used and an isotropic elastic-plastic constitutive equation with isotropic hardening, damage and strain rate dependent loading surface. LÄS MER
5. Parameter identification in constitutive models with a posteriori error control and sensitivity assessment
Sammanfattning : In this thesis a framework for the calibration of constitutive models is presented. The framework involves theformulation of an optimization problem which is solved usingstrategies based on, essentially, Newton's method. LÄS MER