Per Ståhle
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View article: On the optimisation of phase fractions in harmonic structure materials
On the optimisation of phase fractions in harmonic structure materials Open
Materials with heterogeneous microstructures architected across several scales are becoming increasingly popular in structural applications due to unique strength–ductility balance. One of the most popular 3D-architected structure designs …
View article: On Stress Driven Diffusion in Bone -- An Experimental Study
On Stress Driven Diffusion in Bone -- An Experimental Study Open
The transport of nutrients or signal constituents that stimulate growth of bone tissue is supposed to be affected by a static mechanical load. It follows from basic thermodynamical principles that constituents causing volumetric change are…
View article: Numerical Simulation of Buckling and Post-Buckling Behavior of a Central Notched Thin Aluminum Foil with Nonlinearity in Consideration
Numerical Simulation of Buckling and Post-Buckling Behavior of a Central Notched Thin Aluminum Foil with Nonlinearity in Consideration Open
In thin notched sheets under tensile loading, wrinkling appears on the sheet surface, specifically around the cracked area. This is due to local buckling and compression stresses near the crack surfaces. This study aims to numerically stud…
View article: On the formation of expanding crack tip precipitates
On the formation of expanding crack tip precipitates Open
The stress driven growth of an expanding precipitate at a crack tip is studied. The material is assumed to be linearly elastic, and the expansion is considered to be isotropic or transversely isotropic. The extent of the precipitate is exp…
View article: On instabilities of growing bi-material interfaces
On instabilities of growing bi-material interfaces Open
This study concerns the evolution of morphological patterns that often arise on the interface of bi-material, so called metal precipitate phase, due to the instability of the interfaces. The instability leads to growth or retraction of sma…
View article: A fracture mechanics model to study indentation cutting
A fracture mechanics model to study indentation cutting Open
Many cutting processes, such as chopping, slicing, and carving, consist in 2 different stages: an initial stage of indentation, in which the cutting tool is pushed into the material under the action of an external force, and a second stage…
View article: On Phase-Field Modelling : Invited Talk given at Kunming University, Orationem Meam
On Phase-Field Modelling : Invited Talk given at Kunming University, Orationem Meam Open
Presentation Slides
View article: Cutting resistance of polymeric materials: experimental and theoretical investigation
Cutting resistance of polymeric materials: experimental and theoretical investigation Open
In the present paper, an experimental campaign is carried out with reference to the steady state propagation of an existing cut in polymeric plates, ranging from glassy to soft polymers. The steady state propagation is investigated by cons…
View article: A Superposition Procedure for Calculation of Effective Diffusion and Elastic Parameters of Sparsely Porous Materials
A Superposition Procedure for Calculation of Effective Diffusion and Elastic Parameters of Sparsely Porous Materials Open
Effective material parameters for diffusion and elastic deformation are calculatedfor porous materials using a continuum theory-based superposition procedure. The theory that is limited to two-dimensional cases, requires that the pores are…
View article: Phase Field Modelling of Bone Growth : What it is and what lead to it? Talk given to the memory of Carl Wilhelm Ossén. Orationem Meam.
Phase Field Modelling of Bone Growth : What it is and what lead to it? Talk given to the memory of Carl Wilhelm Ossén. Orationem Meam. Open
To the memory of Carl W. Ossén.
View article: On the fracture processes of cutting
On the fracture processes of cutting Open
The process of cutting is treated as a fracture mechanical process. For an elliptic rigid wedge pressed into an elastic material, fracture may occur as an autonomous process if the tip of the wedge is sufficiently blunt or is affected by t…
View article: Master curve in upper region of ductile brittle transition: a modification based on local damage approach
Master curve in upper region of ductile brittle transition: a modification based on local damage approach Open
The fracture behaviour of ferritic/ferritic martensitic steels in Ductile to Brittle Transition (DBT) region is well captured by Master Curve approach, except in the upper region of transition due to ductile tearing prior to cleavage. The …
View article: A loss of constraint assessment using σ*-V* approach to describe the effect of crack depth on reference transition temperature T0
A loss of constraint assessment using σ*-V* approach to describe the effect of crack depth on reference transition temperature T0 Open
The assessment of fracture behaviour of ferritic/ferritic martensitic steels in Ductile to Brittle Transition (DBT) region iscrucial for shallower cracks. In this work the fracture behavior of In-RAFM steels isinvestigated with systematica…