H2020Индивидуална стипендия2015–2016

MicroFrac · Visualization and modelling of fracture at the microscale

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2015-07-01 → 2016-06-30
Финансиране от ЕС: 85 061 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Микроскопичните празнини в металите, които са по-тънки от човешки косъм, се анализират чрез експерименти и модели. Разбирането на техния растеж помага за по-добро предвиждане на материала, при който се появяват пукнатини, и създаването на по-издръжливи материали.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Visualization and modelling of fracture at the microscale

In recent years, large spills from oil pipelines and tankers, leaks from nuclear reactors and the constant need for lighter, stronger, and safer materials in the transportation industry illustrate how breaks or cracks (fracture) can have detrimental effects in terms of health and safety, the environment, and the economy. Recent reports also suggest that the costs of fracture in Europe reach 4% of Europe’s gross domestic product which means about 500 billion euros. There is therefore a growing need for materials with improved fracture resistance. When materials are deforming during in-service use, there is a point at which very small voids start appearing inside the material, whose diameters are less than a hundreds of the width of a human hair. These tiny voids grow, and when they are large enough, they link with each other resulting in material failure. Knowing how fast these voids grow is therefore a key aspect to understand when materials will fail. Most work to date has been focused on rather large voids and there is very little experimental information on the mechanisms of void growth at lower scales (i.e. the microscale). This lack of information on fracture at the microscale is one of the key factors that prevent better fracture predictions and the design of damage resistant materials. The investigations carried out under the MicroFrac project (a research project funded by the European Union under the Marie Skłodowska-Curie actions) aimed at providing a contribution towards our understanding of fracture at the microscale through a combination of state-of-the-art experiments and models. These results allowed us to better understand the early stages of fracture in metals, when voids are still very small. The preliminary simulations results are very promising for the development of advanced simulation tools to more accurately predict when materials will break and to design fracture resistant materials.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

In recent years, large spills from oil pipelines and tankers, leaks from nuclear reactors and the constant need for lighter andstronger materials in the transportation industry illustrate the need for materials with improved fracture resistance. Recentreports also suggest that the costs of fracture in Europe reach 4% of Europe’s gross domestic product which mean about500 billion Euros. These facts show how fracture of structural materials can have detrimental effects in terms of health andsafety, the environment, and the economy. One key elements that prevents better fracture predictions is a lack of informationon fracture at the microscale. Indeed, fracture takes place by the formation and growth of microvoids and how these voidsgrow is still unknown and prevents the development of accurate fracture models. This proposal aims at providing asignificant contribution towards our understanding of fracture at the microscale through a combination of state-of-the-artexperiments and models.Microvoids will be introduced in metallic single crystals and their growth will be followed in-situ at high resolution. The effectsof void size and crystal orientation will be investigated and the results will be used to validate dislocation dynamics andcrystal plasticity models. The outcomes of the project will be new experimental evidence of fracture at the microscale and thecreation of an improved crystal plasticity model that can take into account size effects to better predict metal fracture.

Оригинален текст от CORDIS (на английски).

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