Strength Analysis of Composite Turbine Blades
Strength Analysis of Composite Turbine Blades
复制标题
复合材料涡轮叶片强度分析
DOI：
10.1177/073168448800700603
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
S. Soni
中科院分区：
文献类型：
--
作者：
N. Pagano;S. Soni
涡轮发动机叶片可以制成不同方向的复合材料层的叠层形式。在这项工作中，我们推导了两个近似的解析模型来描述旋转涡轮叶片各层内的应力/应变场。该模型的基础是一个基本的观察结果，即非常低的宽厚比排除了经典层合理论的假设的使用。对响应分布与总体平衡一致的合理假设，得到了适当的解析表达式。对三种不同的叶片结构进行了强度预测，其中一种具有现有设计所使用的方向，第二种容易发生故障，第三种在给定角速度下不容易发生故障。结果表明，利用这些模型可以确定最佳叶片结构。利用层合板的有效材料性能，对现有模型和现有模型的预测结果进行了比较。用这些模型编制了IBM-PC计算机上的计算机程序，用于涡轮叶片的强度分析。
Turbine engine blades can be made in a laminate form of composite layers oriented in various directions. In this work we derive two approximate analytical models to describe the stress/strain field within each layer of a rotating turbine blade. At the foundation of the model is the fundamental observation that the very low width-to-thickness ratio precludes the use of the assumptions of classical lamination theory. Reasonable assumptions regard ing the response distributions that are consistent with overall equilibrium lead to the ap propriate analytical expressions. Strength predictions are made for three different blade architectures, one with orientations used by an existing design, the second prone to failure, and the third not prone to failure for a given angular velocity. The results show that an op timum blade architecture can be determined using these models. A comparison is made between the predicted results by an existing model and one of the present models by using effective material properties of the laminate. A computer code for IBM-PC computer has been written using these models for conducting the strength analysis of the turbine blade.