IUTAM Symposium on Mechanics of Granular and Porous Materials
Proceedings of the IUTAM Symposium held in Cambridge, U.K., 15–17 July 1996
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Article
A Three-Stage Mechanistic Model for Solidification Cracking During Welding of Steel
A three-stage mechanistic model for solidification cracking during TIG welding of steel is proposed from in situ synchrotron X-ray imaging of solidification cracking and subsequent analysis of fracture surfaces. ...
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Article
Open AccessInitiation and growth kinetics of solidification cracking during welding of steel
Solidification cracking is a key phenomenon associated with defect formation during welding. To elucidate the failure mechanisms, solidification cracking during arc welding of steel are investigated in situ with ...
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Article
Internal strains between grains during creep deformation of an austenitic stainless steel
Internal strains that develop between grains during creep of an austenitic stainless steel were measured using in situ neutron diffraction. The secondary creep pre-strained test specimens were considered. Meas...
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Chapter
The Anderson-Bishop Problem—Thermal Ratchetting of a Polycrystalline Metals
The paper readdresses a theory of super-plastic behaviour induced by cyclic temperature for certain classes of polycrystalline metals and composite materials, originally analyses by Anderson and Bishop in the ...
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Article
Thermodynamic Variational Approach for Climb of an Edge Dislocation
A general thermodynamic variational approach is applied to study the force on an edge dislocation, which drives the dislocation to climb. Our attention is focused on the physical mechanism responsible for disl...
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Chapter
Mechanics of Powder Compaction
The purpose of this chapter is to cover the basic mechanics principles that underpin the development of the material and computational models described in this book. The chapter is aimed at the nonspecialist a...
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Chapter
Modelling Die Compaction in the Pharmaceutical Industry
This chapter presents the current state of die compaction modelling in the pharmaceutical industry. The topic is introduced with a review of the particular features of pharmaceutical powder formulations. The o...
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Chapter
Die Fill and Powder Transfer
Initial work on compaction modelling assumed that the density of the powder bed in a die at the start of compaction is uniform. This has been challenged from two directions. Firstly, measurements of the densit...
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Chapter
Compaction Models
Modelling correctly the behaviour of a powder during pressing is the first issue that needs to be resolved before thinking of reliable numerical simulation. For example, in the early 1950’s it was established ...
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Book and Conference Proceedings
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Article
Using Principle of Virtual Motion and Galerkin Approximation to Analyze Surface Diffusion
This paper outlines the use of the Principle of Virtual Motion and the Galerkin approximation to analyze surface diffusion phenomena. Various ideas are illustrated with an analysis of the evolution of a fiber ...
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Article
Void growth ahead of a dominant crack in a material which deforms by coble creep
This paper examines the process of void growth ahead of a dominant crack in a material which deforms by grain-boundary diffusion. A numerical technique recently developed by the authors is used to analyse the ...
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Article
The effect of grain-size on the stress and velocity fields ahead of a crack in a material which deforms by Coble creep
The stress and velocity fields ahead of a grain-boundary crack in a material which deforms by Coble creep are investigated for a series of grain sizes using the numerical analysis technique established by Cock...
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Book
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Chapter and Conference Paper
Creep and Rupture in Relation to Field Experiments
The paper discusses the micromechanical deformation and fracture processes in ice under sustained loading and their relationship with observed macromechanical processes which define the forces which moving ice...
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Chapter
The Use of Shakedown Concepts in the Development of Design Rules for Shell Structures Subjected to Severe Cyclic Thermal Loading
From the shakedown and ratchet ting limit analysis of a wide range of thermal loading problems for axisymmetric thin shells it is evident that only a limited number of possible mechanisms of incremental collap...
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Book
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Chapter
A Micromechanics Based Model for the Creep Of Ice Including the Effects of General Microcracking
A constitutive law for the creep response of ice during general microcracking is developed in this paper. A simple three-bar structure is introduced for uniaxial loading and used to identify the general featur...
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Chapter and Conference Paper
Reference Stress Concepts for the High Temperature Deformation and Rupture of Cyclically Loaded Shell Structures
The theory of continuum damage mechanics is used to determine the properties of shells operating at temperatures sufficiently high for time-dependent deformations and material damage to be dominant factors aff...
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Chapter and Conference Paper
Creep Fracture by Void Growth
Recent developments in the understanding of creep fracture in both uniaxial tension and multiaxial stress states are outlined. Simple analytical equations for void growth are given. It is shown how these mecha...
