Does the shear-lag model apply to random fiber networks?

Autor:	Risto M. Nieminen, Mikko J. Alava, V. I. Räisänen, Kaarlo Niskanen
Rok vydání:	1997
Předmět:	Materials science Shear (geology) Mechanics of Materials Mechanical Engineering Lag Transfer mechanism Cylinder stress General Materials Science Mechanics Condensed Matter Physics Elastic modulus
Zdroj:	Journal of Materials Research. 12:2725-2732
ISSN:	2044-5326 0884-2914
DOI:	10.1557/jmr.1997.0363
Popis:	The shear-lag type model due to Cox (Br. J. Appl. Phys. 3, 72 (1952) is widely used to calculate the deformation properties of fibrous materials such as short fiber composites and random fiber networks. We compare the shear-lag stress transfer mechanism with numerical simulations at small, linearly elastic strains and conclude that the model does not apply to random fiber networks. Most of the axial stress is transferred directly from fiber to fiber rather than through intermediate shear-loaded segments as assumed in the Cox model. The implications for the elastic modulus and strength of random fiber networks are discussed.
Databáze:	OpenAIRE
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