论文标题
纤维增强材料应变转移原理的扩展
An Extension of the Strain Transfer Principle for Fiber Reinforced Materials
论文作者
论文摘要
光纤应变传感器用于测量纤维内特定传感器位置的应变。为了推断周围矩阵材料中的应变，可以采用应变转移原理。它的应用是基于以下假设：纤维的存在不会阻碍纤维方向的基质材料的变形。实际上，应变转移原理意味着纤维内部的纤维方向的应变将逐字传递到基质材料内部的应变。但是，对于相对较软的矩阵材料，这种基本假设可能无效。为了克服这一缺点，我们建议将矩阵材料与纤维的一维模型叠加，以考虑其弹性特性。该模型的有限元解决方案以低计算成本以纤维方向上的纤维内部的应变进行了更准确的预测。
Fiber optical strain sensors are used to measure the strain at a particular sensor position inside the fiber. In order to deduce the strain in the surrounding matrix material, one can employ the strain transfer principle. Its application is based on the assumption that the presence of the fiber does not impede the deformation of the matrix material in fiber direction. In fact, the strain transfer principle implies that the strain in fiber direction inside the fiber carries over verbatim to the strain inside the matrix material. For a comparatively soft matrix material, however, this underlying assumption may not be valid. To overcome this drawback, we propose to superimpose the matrix material with a one-dimensional model of the fiber, which takes into account its elastic properties. The finite element solution of this model yields a more accurate prediction of the strain inside the fiber in fiber direction at low computational costs.
