Inorganic Fiber Damage Evolution during Textile Processing

GE Aviation Bromont(GEAB)目前正在开发用于发动机**应用的陶瓷基复合材料(CMC)。这些CMC是由镶嵌在碳化硅基质**材料中的碳化硅陶瓷纤维制成的。形成纱线的碳化硅陶瓷纤维高度僵硬和脆性。在所有纱线处理**操作中(例如，涂层、卷绕等)，纱线都会受到中等程度的损坏。这种损害会累积，对零件质量和产量都有不利影响。GEAB和**蒙特利尔理工学院最近的一项合作导致了一种建模和测试方法的开发，以了解纱线加工过程中**纤维损伤的机制。作为该项目的继续，本Engage Plus**提案的目标是开发和验证一种建模方法，以了解纱线加工过程中纤维损伤的演变**。在算盘中建立了一个参数非线性有限元模型来描述**纱线的处理情况。这个模型现在将被用来比较不同参数对摩擦、耗能和损伤的影响。已经建立了一个小型试验台，使用移动的纱线弯曲装置在固定的纱线之间运行，以加载单元。这个装备现在将被用来复制不同的伤害创造**条件。测试条件包括纱线在滑轮上的移动速度、滑轮的旋转速度、滑轮的直径和形状以及滑轮材料。在这个项目中，我们将开发经过验证的建模**方法来了解纤维-纤维和纤维-表面摩擦相互作用。通用电气航空公司Bromont将扩大其在飞机发动机方面的高性能复合材料应用的研发工作。

GE Aviation Bromont (GEAB) is currently developing ceramic matrix composites (CMCs) for engine**applications. These CMCs are made with silicon carbide (SiC) ceramic fiber embedded in a SiC matrix**material. The SiC ceramic fibers forming the yarns are highly stiff and brittle. During all yarn handling**operations (e.g., coating, spooling, etc.), yarns undergo a moderate level of damage. This damage accumulates**and has a detrimental effect on both part quality and yield. A recent collaboration between GEAB and**Polytechnique Montreal has resulted in the development of a modelling and testing approach to understand the**fiber damage mechanisms during yarn processing. As a continuation of this project, this present Engage Plus**proposal's objective is to develop and validate a modelling approach to understand the fiber damage evolution**during yarn processing. A parametric non-linear finite element model has been created in Abacus to represent**yarn handling situations. This model will now be used to compare different parameters' influence on friction**dissipated energy and damage. A small test rig using a moving yarn torture device running against a yarn fixed**between to load cells has been built. This rig will now be used to reproduce different damage creation**conditions. Test conditions will include yarn moving speed against the pulleys, rotation speed of the pulleys,**diameter and shape of the pulleys, and pulley material. With this project, we will develop validated modelling**approaches to understand fiber-fiber and fiber-surface friction interactions. GE Aviation Bromont will expand**its R&D efforts towards high performance composite applications in aircraft engines.