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Viscoelastic Behavior of Hybrid Building Materials

机译：混合建筑材料的粘弹性行为

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The objective of this experimental work is the investigation of the viscoelastic behavior of a hybrid matrix, fiber-reinforced building material. Hybrid matrix consisted of epoxy resin mixed with fine marble sand, whereas short steel fibers were used as reinforcement. The experimental procedure involved, first, the manufacturing of specimens using different hybrid matrix types and different reinforcement by weight ratios. Subsequently, bending relaxation experiments at room temperature were executed, under three-point bending test experimental configuration, at different strain levels and the variation of stress of the hybrid matrix material with time was monitored. The data obtained were used to (i) investigate the effect of reinforcement mass fraction contained in the composite on the viscoelastic behavior and (ii) to apply existed and newly developed viscoelastic models for the description of the observed viscoelastic behavior. More precisely, the four-parameter (Burgers) viscoelastic model and the modified Residual Property Model were calibrated and used to simulate the relaxation behavior of the materials manufactured and tested. Experimental results exhibited a clear influence of both reinforcement ratio and initial displacement on the viscoelastic behavior of the materials manufactured and tested, whereas the models proposed and used can adequately reproduce the variation of relaxation stress with time. (C) 2014 Wiley Periodicals, Inc.
机译：该实验工作的目的是研究混合基质，纤维增强建筑材料的粘弹性行为。混合基质由环氧树脂和细大理石砂混合而成，而短钢纤维则用作增强材料。实验过程首先涉及使用不同的混合基质类型和不同的重量比增强来制造样品。随后，在三点弯曲试验实验配置下，在不同的应变水平下，在室温下进行弯曲松弛实验，并监测杂化基质材料的应力随时间的变化。获得的数据用于（i）研究复合材料中所含的增强质量分数对粘弹性行为的影响，以及（ii）应用现有和新开发的粘弹性模型来描述观察到的粘弹性行为。更准确地说，对四参数（伯格斯）粘弹性模型和改进的残余特性模型进行了校准，并用于模拟所制造和测试的材料的松弛行为。实验结果表明，增强比和初始位移对制造和测试的材料的粘弹性行为都有明显的影响，而提出和使用的模型可以充分再现松弛应力随时间的变化。 （C）2014威利期刊公司

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