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Polyolefin fiber-reinforced concrete composites. Part II. Damping and interface debonding
Two damping mechanisms are suggested to explain the high damping found from preliminary dynamic testing of polyolefin fiber-reinforced concrete composites (FRC). A significant interfacial relative displacement, which may cause debonding and corresponding interfacial friction, is suggested as the fundamental energy dissipation mode during vibration. Such a displacement may easily take place over a great fraction of an interface between low-aspect ratio fiber and cementitious matrix, resulting in high damping in crimped FRC. Debonding at the intersections of microcracks in matrix and fiber due to the crack opening under tensile strain also consumes vibration energy, producing extra damping in fine FRC. In order to gain high damping without seriously degrading other mechanical properties of FRC, a combination of reinforcing fibers with different geometric features is suggested.
Polyolefin fiber-reinforced concrete composites. Part II. Damping and interface debonding
Two damping mechanisms are suggested to explain the high damping found from preliminary dynamic testing of polyolefin fiber-reinforced concrete composites (FRC). A significant interfacial relative displacement, which may cause debonding and corresponding interfacial friction, is suggested as the fundamental energy dissipation mode during vibration. Such a displacement may easily take place over a great fraction of an interface between low-aspect ratio fiber and cementitious matrix, resulting in high damping in crimped FRC. Debonding at the intersections of microcracks in matrix and fiber due to the crack opening under tensile strain also consumes vibration energy, producing extra damping in fine FRC. In order to gain high damping without seriously degrading other mechanical properties of FRC, a combination of reinforcing fibers with different geometric features is suggested.
Polyolefin fiber-reinforced concrete composites. Part II. Damping and interface debonding
Yan, L. (author) / Jenkins, C.H. (author) / Pendleton, R.L. (author)
Cement and Concrete Research ; 30 ; 403-410
2000
8 Seiten, 16 Quellen
Article (Journal)
English
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