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Numerical Derivation of strain rate effects on Material Properties of Masonry with Solid Clay Bricks

Transactions of Tianjin University 2006年第B9期12卷 147-151页

作者： WEI Xueying HAO Hong School of Civil and Resource Engineering The University of Western Australia WA6009 Australia

In this paper, numerical method is used als. A typical unit of masonry is selected to serve merical model of RVE is established with detailed to study the strain rate effect on masonry materias a representative volume element （RVE）. Nudistinctive modeling of brick and mortar with their respective dynamic material properties obtained from laboratory tests. The behavior of brick and mortar are characterized by a dynamic damage model that accounts for rate-sensitive and pressuredependent properties of masonry materials. Dynamic loads of different loading rates are applied to RVE. The equivalent homogenized uniaxial compressive strength, threshold strain and elastic modulus in three directions of the masonry are derived from the simulated responses of the RVE. The strain rate effect on the masonry material with clay brick and mortar, such as the dynamic increase factor （DIF） of the ultimate strength and elastic modulus as a function of strain rate are derived from the numerical results.

关键词： masonry structure strain rate effects dynamic increase factor (DIF) elastic modulus ultimate strength

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strain rate effects on the Tensile Behaviour ofUnidirectional Glass Fibre-ReinforcedThermoset Matrix Composites

Strain Rate Effects on the Tensile Behaviour ofUnidirectiona...

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第十三届国际复合材料会议

作者： S.Pardo D.Baptiste J.Fitoussi R.Joannic ENSAM/LM3/CNRS ESA 8006 151 boulevard de l’H(?pital 75013 Paris France ENSAM/LM3/CNRS ESA 8006 151 boulevard de l’H(?pital 75013 Paris France D6A/CTA 16 bis avenue prieur de la c(?te d’or 94114 Arcueil cedex France

＜正＞The aim of this study is to determinate the 3D global behaviour law of unidirectional glass fibre-reinforced polyester matrix composites on dynamic range. This material is particularly used by the marine industry;its response under impact loading is one of their principal care. A behaviour law will permit to describe entirely the characteristics of composite materials whatever the strain rate and the orientation of the solicitation.

关键词： delamination inidation and crack propagation strain energy release rate strain rate effects E glass/polyester composites

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Experimental Study of strain rate Sensitivity of Carbon Fiber/Epoxy Composite

Experimental Study of Strain Rate Sensitivity of Carbon Fibe...

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第十三届国际复合材料会议

作者： AmosGilat The Ohio State University Department of Mechanical Engineering 206 W. 18~(th Ave. Columbus OH 43210 USA Robert K. Goldberg and Gary D. Roberts NASA Glenn Research Center Cleveland OH 44135 USA

strain rate sensitivity of IM-7/977-2 carbon fibers/epoxy matrix composite is studied by testing various laminate configurations at different strain rates. Tensile tests have been conducted at quasi-static strain rates of 10 s , intermediate strain rates of about 1 s, and high strain rates of approximately 400 s. The tensile split Hopkinson bar technique is used for the high strain rate tests. The standard technique is modified to measure strain directly on the specimen. The results show that strain rate has a significant effect on the material response.

关键词： strain rate effects split Hopkinson bar tests carbon fiber/epoxy composite

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