Role of tool-part interaction in process-induced warpage of autoclave-manufactured composite structures
Role of tool-part interaction in process-induced warpage of autoclave-manufactured composite structures
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DOI：
10.1016/j.compositesa.2010.04.017
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发表时间：
2010-09
影响因子：
8.7
通讯作者：
X. Zeng;J. Raghavan
中科院分区：
文献类型：
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作者：
X. Zeng;J. Raghavan
利用三维工艺模型研究了刀具-零件相互作用在大型复合材料结构工艺翘曲中的作用，该模型通过集成子模型来描述在高压灭菌过程中复合材料的固化和性能的演变以及遇到的各种物理现象。工艺模型通过与有限元软件ABAQUS接口的用户子程序实现。利用接触单元对加工过程中的刀具-零件交互作用进行了建模。使用摩擦刀具-零件界面和实验测量的固化相关刀具-零件界面摩擦系数，对飞机零件的温度和翘曲进行了预测，与实验温度和翘曲进行了很好的比较，验证了三维工艺模型的有效性。通过对不同刀具-零件界面模型预测结果的比较表明，引起翘曲的刀具-零件相互作用的两个组成部分是刀具和零件的形状变化，以及刀具和零件的约束变形引起的工艺诱发应力。
The role of tool-part interaction in process-induces warpage of a large composite structure was studied using a three-dimensional process model, developed by integrating sub-models that describe the evolution of cure and properties of composite as well as various physical phenomena encountered, during autoclave processing. The process model was implemented through user sub-routines interfaced with the finite element software, ABAQUS. The tool-part interaction during processing was modeled using contact elements. The predicted temperature and warpage of an aircraft part, using a frictional tool-part interface and experimentally measured cure-dependent tool-part interfacial friction coefficients, compared very well with experimental temperature and warpage, validating the 3-D process model. A comparison of predictions using various models for the tool-part interface suggests that the two components of tool-part interaction that contribute to warpage are change in shape of the tool and part, and process-induced stress caused by constrained deformation of the tool and the part.