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The Curie brothers, Pierre and Jacques, discovered the piezoelectric effect in 1880. The phenomenon has been exploited in many useful… Read more: Discussion of fracture paper #44 – Flexo & piezoelectric effects and cracks

Fracture mechanics suddenly provides a step forward to stop climate change. The blogger has often pictured us humans walking on… Read more: Discussion of fracture paper #43 – Fracture Mechanics Contributes to Averting Our Planetary Climate Change Crisis

The present EFM paper selected for discussion applies artificial intelligence (AI) to fatigue crack growth. The subject is on the… Read more: Discussion of fracture paper #42 – Artificially Intelligent Fatigue Crack Growth

Shifting from macroscopic to microscopic plasticity helps us understand mechanisms that can help us develop high-strength metallic materials. Things that… Read more: Discussion of fracture paper #41 – Are dislocations good or bad guys? It depends!

Around 20 years ago, I gave a fracture mechanics lecture and talked about crack initiation that happens in the plane… Read more: Discussion of fracture paper #40 – Icicle or carrot, which one has isotropic fracture properties?

Dynamic fracture is a never-ending story. In 1951, EH Yoffe obtained an analytical solution for a crack of constant length… Read more: Discussion of fracture paper #39 – Dynamic Fracture on a Molecular Level

The Nobel laureate Andre Geim made graphene by playing with pencil leads and Scotch tape and coauthored a paper on… Read more: Discussion of fracture paper #38 – Fracture of the Thinnest of Sheets – Graphene

The advantage of simplicity is that mechanics and physics can be understood and predicted just by using pen and paper.… Read more: Discussion of fracture paper #37 – A Novel Approach Improving Mode I+III Cohesive Zone Modelling

The fracture of concrete and other semi-brittle materials offers some simplifications that simplify the analytical analysis. The simple check that… Read more: Discussion of fracture paper #36 – The Double-K Fracture Model

The subject of this blog is a well-written and technically detailed study of thermal crack initiation where an adhesive joint… Read more: Discussion of fracture paper #35 – What is Finite Fracture Mechanics?

Hydrogen embrittlement causes problems that probably will become apparent to an increasing extent as hydrogen is taken into general use… Read more: Discussion of fracture paper #34 – The Physics of Hydrogen Embrittlement

This blog concerns an interesting review of the interaction integral methodology. It deserves to be read by everyone dealing with… Read more: Discussion of fracture paper #33 – The Interaction Integral

The paper, “A machine-learning fatigue life prediction approach of additively manufactured metals” by Hongyixi Bao, Shengchuan Wu, Zhengkai Wu, Guozheng Kang,… Read more: Discussion of fracture paper #32 – Fatigue and machine-learning

A most readworthy paper, “Static and dynamic mode I fracture toughness of rigid PUR foams under room and cryogenic temperatures” by E.… Read more: Discussion of fracture paper #31 – Toughness of a rigid foam

Weight functions are practical tools in linear elastic systems where several discrete or continuously distributed sources cause something, deformation, stress,… Read more: Discussion of fracture paper #30 – Weight functions, cracks and corners

The outstanding and brilliantly written paper, “Modeling of Dynamic Mode I Crack Growth in Glass Fiber-reinforced Polymer Composites: Fracture Energy and… Read more: Discussion of fracture paper #29 – Fast crack growth in fibre reinforced composites

The paper “Estimating static/dynamic strength of notched unreinforced concrete under mixed-mode I/II loading” by N. Alanazi and L. Susmel in Engineering… Read more: Discussion of fracture paper #28 – Rate effects and dynamic toughness of concrete

Landau and Ginzburg formulated a theory that includes the free energy of phases, with the purpose to derive coupled PDEs… Read more: Discussion of fracture paper #27 – Phase-field modelling of cracks and interfaces

All materials are anisotropic, that’s a fact. Like the fact that all materials have a nonlinear response. This we can’t… Read more: Discussion of fracture paper #26 – Cracks and anisotropic materials

The subject of this blog is a fracture mechanical study of soft polymers. It is well written and technically detailed… Read more: Discussion of fracture paper #25 – The role of the fracture process region

Carbon fibre reinforced polymers combines desired features from different worlds. The fibres are stiff and hard, while the polymers are… Read more: Discussion of fracture paper #24 – The sound of crack growth

I came across a very interesting paper in Engineering Fracture Mechanics about a year ago. It gives some new results… Read more: Discussion of fracture paper #23 – Paris’ exponent m<2 and behaviour of short cracks

The last ESIS blog about how surprisingly few scientists are willing/able to share their experimental data, received an unexpectedly large… Read more: Discussion of fracture paper #22 – Open access puts scientists in control of their own results

Experimental data availability is a cornerstone for reproducibility in experimental fracture mechanics. This is how the technical note begins, the… Read more: Discussion of fracture paper #21 – Only 6% of experimentalists want to disclose raw-data

It is common practice to obtain stress intensity factors in elastic materials by using Williams series expansions truncated at the r^(-1/2)-stress… Read more: Discussion of fracture paper #20 – Add stronger singularities to improve numerical accuracy

Extreme thermal and electrical conductivity, blocks out almost all gases, stiff as diamond and stronger than anything else. The list… Read more: Discussion of fracture paper #19 – Fracture mechanical properties of graphene

A T-stress is generally not expected to contribute to the stress intensity factor because its contribution to the free energy… Read more: Discussion of fracture paper #18 – A crack tip energy release rate caused by T-stress 

No doubt the energy release rate comes first. What comes next is proposed in a recently published study that describes… Read more: Discussion of fracture paper #17 – What is the second most important quantity at fracture?

It is common practice when solving boundary value problems to split the solution into a symmetric and an antisymmetric part… Read more: Discussion of fracture paper #16 – What is wrong with pure mode I and II? A lot it seems

Everyone loves an elegant engineering solution. It is particularly true when the alternatives are terrifying. In the paper: ”Brittle crack… Read more: Discussion of fracture paper #15 – Designing for crack arrest

A nice demonstration of toughening by introducing multiple secondary cracking of planes parallel with the primary crack is found in… Read more: Discussion of fracture paper #14 – How to understand the J-integral when multiple cracks are growing at different rates

In this review of particularly readworthy papers in EFM, I have selected a paper about the tearing of large ductile… Read more: Discussion of fracture paper #13 – Cohesive properties at ductile tearing

Cracks typically follow paths that locally give a mode I crack tip load. At mixed modes crack are extended via… Read more: Discussion of fracture paper #12 – Crack paths and fracture process region autonomy

In the latest volume of Engineering Fracture Mechanics there is an interesting paper about the calculation of crack growth paths… Read more: Discussion of fracture paper #11 – Fracture processes and phase-field modelling

According to the Swedish Plant Inspectorate the major part of all reported fracture related failures in Sweden are due to stress… Read more: Discussion of fracture paper #10 – Searching for the length scale of stress corrosion

Dear Reader,  I recently took over as the ESIS blog editor. Being the second in this baton relay, I will… Read more: Discussion of fracture paper #9 – Crack tip modelling

This is the story of threefold failure, which doubtlessly is the subject of fracture mechanics, a story of failure in… Read more: Discussion of fracture paper #8 – Elastic follow-up

New paradigms may help understanding unsolved scientific problems by looking on them from a different perspective. Or they may lead… Read more: Discussion of fracture paper #7 – Configurational force approach

“The number of bad papers is multiplying. … a new, dramatic problem arises: how to select in the mud the… Read more: Applicable limit of the stress intensity factor for steep yield strength distribution

The aim of ESIS is not only to develop and extend knowledge in all aspects of structural integrity, but also to disseminate… Read more: A blog for discussing fracture papers

What is the difference betwee a failure criterion and a yield condition? You may meet natural and engineering scientists who… Read more: Discussion of fracture paper #5 – Yield ciriterion or failure criterion

In my previous blog, I complained about colleagues developing constitutive models without having any notion about the specific nature of… Read more: Discussion of fracture paper #4 – Is paper ductile?

Some material scientists and experimentalists are generally sceptical of simulations and reproach the theoreticians with lacking knowledge of real materials.… Read more: Discussion of fracture paper #3 – Length Scales in Fracture

Williams derived it in 1939, Irwin addressed it in 1957 as one of two parameters characterising “the influence of the… Read more: Discussion of fracture paper # 2 – The role of the T-stress

This is a premiere: my first contribution to the new ESIS’ blog announced in January. Why comment on papers in… Read more: Discussion of fracture paper #1 – A contol volume model