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首页> 外文期刊>Journal of Applied Polymer Science >Measurment and numerical simulation of three dimensional fiber orientation states in injection-molded short-fiber-reinforced plastics
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Measurment and numerical simulation of three dimensional fiber orientation states in injection-molded short-fiber-reinforced plastics

机译：注塑短纤维增强塑料中三维纤维取向状态的测量和数值模拟

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To determine three-dimensional fiber orientation states in injection-molded short-fiber composites, a confocal laser scanning microscope (CLSM) is used. Since the CLSM optically sections the specimen, more than two images of the cross sections on and below the surface of the composite can be obtained. Three-dimensional fiber orientation states can be determined by using geometric parameters of fiber images obtained from two parallel cross sections. For experiments, carbon-fiber-reinforced polystyrene is examined by the CLSM and geometric parameters of fibers on each cross-sectional plane are measured by an image analysis. In order to describe fiber orientation states compactly, orientation tensors are determined at different positions of the prepared specimen. Three-dimensional orientation states are obtained without any difficulty by determining the out-of-plane angles utilizing fiber images on two parallel planes acquired by the CLSM. Orientation states are different at different positions and show the shell-core structure along the thickness of the specimen. Fiber orientation tensors are predicted by a numerical analysis and the numerically predicted orientation states show good agreement with measured ones. However, some differences are found at the end of cavity. They may result from the fountain flow effects, which are not considered in the numerical analysis. (C) 2003 Wiley Periodicals, Inc. [References: 26]
机译：为了确定注塑短纤维复合材料中的三维纤维取向状态，使用了共聚焦激光扫描显微镜（CLSM）。由于CLSM对样品进行了光学切片，因此可以获得复合材料表面上和下方的横截面的两个以上图像。可以通过使用从两个平行横截面获得的纤维图像的几何参数来确定三维纤维取向状态。对于实验，通过CLSM检查碳纤维增强的聚苯乙烯，并通过图像分析测量每个横截面上的纤维几何参数。为了紧凑地描述纤维取向状态，在准备好的样品的不同位置确定取向张量。通过利用CLSM采集的两个平行平面上的纤维图像确定平面外角度，可以毫无困难地获得三维取向状态。取向状态在不同位置处是不同的，并且沿着样品的厚度显示出壳-核结构。纤维取向张量通过数值分析来预测，并且数值预测的取向状态与测量的状态显示出良好的一致性。但是，在型腔末端发现了一些差异。它们可能是源于喷泉流的影响，在数值分析中没有考虑。 （C）2003 Wiley Periodicals，Inc. [参考：26]

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