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Energy release rates in rubber during dynamic crack propagation
Royal Institute of Technology, (KTH).
2014 (Engelska)Ingår i: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 51, nr 25-26, s. 4419-4426Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The theoretical understanding of the fracture mechanics of rubber is not as well developed as for other engineering materials, such as metals. The present study is intended to further the understanding of the dissipative processes that take place in rubber in the vicinity of a propagating crack tip. This dissipation contributes significantly to the total fracture toughness of the rubber and is therefore of great interest from a fracture mechanics point of view. To study this, a computational framework for analysing high-speed crack growth in a biaxially stretched rubber under plane stress is therefore formulated. The main purpose is to investigate the energy release rates required for crack propagation under different modes of biaxial stretching. The results show, that inertia comes into play when the crack speed exceeds about 50 m/s. The total work of fracture by far exceeds the surface energy consumed at the very crack tip, and the difference must be attributed to dissipative damage processes in the vicinity of the crack tip. The size of this damage/dissipation zone is expected to be a few millimetres.

Ort, förlag, år, upplaga, sidor
2014. Vol. 51, nr 25-26, s. 4419-4426
Nationell ämneskategori
Textil-, gummi- och polymermaterial
Forskningsämne
Teknik, Maskinteknik
Identifikatorer
URN: urn:nbn:se:lnu:diva-58919DOI: 10.1016/j.ijsolstr.2014.09.010OAI: oai:DiVA.org:lnu-58919DiVA, id: diva2:1055012
Tillgänglig från: 2016-12-09 Skapad: 2016-12-09 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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