单向增强热塑性熔体的面内剪切特性

Q3 Social Sciences

Economic and Political Weekly Pub Date : 2011-04-25 DOI:10.1063/1.3589635

S. Haanappel, R.H.W. ten Thije, U. Sachs, A. Rietman, R. Akkerman, G. Menary

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引用次数: 8

摘要

层内剪切是UD纤维增强热塑性层压板热冲压成形过程中的重要机理。已经开发了各种方法来表征这种剪切机制，但测量的性质可能会相差几个数量级。因此，提出了一种表征纵向剪切粘度的替代方法。具有矩形截面的直纤维增强热塑性棒材承受扭转载荷。试件的响应可以用来表征纤维增强聚合物熔体的剪切性能。模拟了不同的几何形状和夹紧条件，以显示所测粘度的灵敏度。在此基础上，用PEI-AS4和PEEK-AS4组成的粗棒材进行了实验。在不同温度下进行频率扫描。所有的测量结果都显示出明显的剪切变薄行为，这可以方便地用幂律模型来描述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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In-Plane Shear Characterisation of Uni-Directionally Reinforced Thermoplastic Melts

Intra-ply shear is an important mechanism in hot stamp forming processes of UD fibre reinforced thermoplastic laminates. Various methods have been developed to characterise this shear mechanism, but measured properties may differ for several orders of magnitude. Therefore, an alternative method to characterise the longitudinal shearing viscosity is presented. Straight fibre reinforced thermoplastic bars with a rectangular cross section are subjected to torsional loadings. The specimens' response can be used to characterise the shear properties of the fibre reinforced polymer melt. Different geometries and clamping conditions were modelled to show the sensitivity of the measured viscosity. Based on this, experiments were performed with thick bars with a PEI-AS4 and PEEK-AS4 composition. Frequency sweeps were applied at different temperatures. All measurements showed a clear shear thinning behaviour, which can conveniently be described with a power law model.

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来源期刊

Economic and Political Weekly Social Sciences-Political Science and International Relations

CiteScore

0.90

自引率

0.00%

发文量

期刊介绍： The Economic and Political Weekly, published from Mumbai, is an Indian institution which enjoys a global reputation for excellence in independent scholarship and critical inquiry. First published in 1949 as the Economic Weekly and since 1966 as the Economic and Political Weekly, EPW, as the journal is popularly known, occupies a special place in the intellectual history of independent India. For more than five decades EPW has remained a unique forum that week after week has brought together academics, researchers, policy makers, independent thinkers, members of non-governmental organisations and political activists for debates straddling economics, politics, sociology, culture, the environment and numerous other disciplines.