Material instability in the tensile response of short-fibre-reinforced quasi-brittle composites

• Autorzy: Wang J. , Karihaloo B.
• Języki publikacji: EN

Abstrakty

EN

This paper gives the conditions for the onset of instability in the tensile response of short-fibre-reinforced quasi-brittle composites whose deformation is characterised by multiple cracking and localisation. First, the tensile stress-strain relation is established analytically for a body containing multiple bridged microcracks. The material instability is examined using the classical bifurcation criterion, with an emphasis on the role played by fibre bridging in the macroscopic instability. It is found that while the microscopic instability in the bridging traction plays a major role in the macroscopic instability of the composite, it is the level of damage in the matrix that determines when the macroscopic instability is induced by the bridging instability. The satisfaction of the classical bifurcation criterion is identified with several failure modes, depending on the degree of damage in the matrix.

Słowa kluczowe

EN

material instability; microcrack; short-fibre-reinforced composities; tensile deformation process; tensile stress

PL

materiały wzmocnione włóknem; mikropęknięcie; odkształcenia przy rozciąganiu; rozciąganie

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2000
• Tom: Vol. 52, nr 4-5
• Strony: 839--855
• Opis fizyczny: Bibliogr. 17 poz.,

Twórcy

autor

Wang J.

autor

Karihaloo B.