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Tensile strength of cementitious materials under triaxial loading.

机译：胶结材料在三轴载荷下的拉伸强度。

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摘要

A general tension-compression-compression ;Tensile strength values from the CCATT are compared to experimental results from other tests such as the uniaxial tensile test and the split cylinder test. CCATT results are analyzed using Weibull theory to measure material reliability and to develop characteristic stresses for construction design.;Failure analysis using fractography was conducted on fractured cementitious materials and composites. The failure analysis on test specimens correlated well with FEM stress distributions and with the principal stress ratio. The observed fracture behavior (fracture patterns) was correlated to different strength regions of the model. Additionally, a failure model of fiber wrapped cementitious composite is developed.;Using data on load-extension behavior from the UTT and ultimate strength from the CCATT models for fiber wrapped cementitious composites were developed. These models predict the mechanical behavior of fiber sheets subjected to cycles of wetting and drying in a simulated seawater environment; therefore, the tensile strength using the CCATT is applicable to a wide range of brittle materials including cementitious composites.
机译：将CCATT的一般拉伸-压缩-压缩拉伸强度值与其他测试（例如单轴拉伸测试和剖分气缸测试）的实验结果进行比较。使用威布尔理论分析CCATT结果，以测量材料的可靠性并开发特征应力以进行施工设计。;对断裂的胶凝材料和复合材料进行了断裂分析的断裂分析。试样的失效分析与有限元应力分布和主应力比密切相关。观察到的断裂行为（断裂模式）与模型的不同强度区域相关。另外，建立了纤维包裹水泥基复合材料的破坏模型。；利用UTT的载荷-延伸行为数据和CCATT模型得出了纤维包裹水泥基复合材料的极限强度。这些模型预测了在模拟的海水环境中经受湿润和干燥循环的纤维板的机械性能；因此，使用CCATT的拉伸强度适用于包括水泥复合材料在内的各种脆性材料。

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  • 作者

    Tsubota, Shuji.;

  • 作者单位

    Worcester Polytechnic Institute.;

  • 授予单位 Worcester Polytechnic Institute.;
  • 学科 Engineering Civil.;Engineering Materials Science.;Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 271 p.
  • 总页数 271
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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