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Federal research significant in environmental rule-making

Federally-sponsored science plays a more significant role in bringing together stakeholders and facilitating environmental governance debates than all other types of research, according to an international team of researchers.

Crack propagation is asymmetric in polar materials

The ICN2 Oxide Nanophysics Group, led by ICREA Prof. Gustau Catalán, has published in Physical Review Letters how, due to flexoelectricity, cracks in ferroelectrics (switchable polar materials) propagate more easily in the ...

Damaging Sichuan earthquakes linked to fracking operations

Two moderate-sized earthquakes that struck the southern Sichuan Province of China last December and January were probably caused by nearby fracking operations, according to a new study published in Seismological Research ...

Artificial intelligence for the study of sites

An experimental study led by researcher Abel Moclán, from the Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), has just been published in the Archaeological and Anthropological Sciences journal, which ...

Turning stem cells into bone with nanoclay-reinforced hydrogel

Assistant Professor Alireza Dolatshahi-Pirouz and colleagues have developed a hydrogel that combines synthetic materials with living cells, and can turn stem cells into bone without adding external growth or differentiation ...

Simple and low-cost crack-healing of ceramic-based composites

A team of researchers at Osaka University demonstrated that cracks induced in composites consisting of alumina ( Al2O3) ceramics and titanium (Ti) as dispersed phase could be healed at room temperature, a world first. This ...

Anti-fatigue-fracture hydrogels

Hydrogels are polymer networks infiltrated with water, widely used for tissue engineering vehicles of drug delivery and novel platforms for biomedical engineering. Emerging applications for new hydrogel materials call for ...

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Fracture

A fracture is the (local) separation of an object or material into two, or more, pieces under the action of stress.

The word fracture is often applied to bones of living creatures (that is, a bone fracture), or to crystals or crystalline materials, such as gemstones or metal. Sometimes, in crystalline materials, individual crystals fracture without the body actually separating into two or more pieces. Depending on the substance which is fractured, a fracture reduces strength (most substances) or inhibits transmission of light (optical crystals).

A detailed understanding of how fracture occurs in materials may be assisted by the study of fracture mechanics.

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