Purpose

The purpose of this paper is to present a skin-based approach able to generate the variability model for a component in composite material due to its manufacturing process. It generates a skin-based model of the manufactured part. The skin model discretizes the part surfaces by points to take into account the geometric deviations, those points are the nodes of finite element analysis used for tolerance analysis of compliant assemblies.

Design/methodology/approach

The paper presents a general and systematic simulation model for generating a variability meta-model for a component in composite material due to its manufacturing process. The model is constituted by three steps: definition and pre-processing of the nominal model, generation of the manufacturing process model and evaluation of the part variability.

Findings

The advantage of this approach is related to the fact that it is designed as a part of a digital process that establishes a continuous and unambiguous flow of variation information from the part design to manufacturing and assembly and that takes into account the manufacturing signature. This is its uniqueness compared to other simulation approaches focused only on manufacturing.

Research limitations/implications

Considering the variability around the nominal value of all the process parameters and parts with more complex geometries are not taken into account now, which will be modelled in practical applications.

Practical implications

To properly manage uncertainty since conceptual design of complex product, next generation geometry assurance requires simulation models to realistically consider process signatures due to the manufacturing process. This work focusses on this next generation tool for geometry assurance.

Originality/value

The literature is focused on metal sheets joined by welding or riveting. There are other materials widely used and typically compliant: the composite materials that typically used mechanical fixing elements (bolting, riveting) and structural adhesives to joint parts. No software tools exist in the literature to deal with uncertainty from manufacturing to assembly processes in products made by composite. This is the reason of the present work.

中文翻译：

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为复合材料中的顺应零件生成基于皮肤的元模型：数值和实验结果

目的

本文的目的是提出一种基于皮肤的方法，该方法能够根据复合材料的制造过程为其生成一个可变性模型。它生成制造零件的基于皮肤的模型。蒙皮模型考虑到几何偏差，通过点将零件表面离散化，这些点是用于柔性装配体公差分析的有限元分析的节点。

设计/方法/方法

本文提出了一种通用且系统的仿真模型，该模型可为复合材料中由于其制造过程而产生的零件生成可变性元模型。该模型由三个步骤组成：标称模型的定义和预处理，制造过程模型的生成以及零件变异性的评估。

发现

这种方法的优势与以下事实有关：它被设计为数字过程的一部分，该过程建立了从零件设计到制造和组装的连续，明确的变化信息流，并考虑了制造特征。与仅专注于制造的其他仿真方法相比，这是其独特之处。

研究局限/意义

现在不考虑所有工艺参数和具有更复杂几何形状的零件的标称值附近的可变性，这将在实际应用中建模。

实际影响

为了适当地管理复杂产品的概念设计以来的不确定性，下一代几何结构保证要求仿真模型切实考虑由于制造过程而引起的过程签名。这项工作集中在用于几何保证的下一代工具上。

创意/价值

文献集中在通过焊接或铆接连接的金属板上。还有其他广泛使用且通常合规的材料：通常使用机械固定元件（螺栓，铆接）和结构粘合剂连接到零件的复合材料。文献中没有软件工具可以处理复合材料制成的产品从制造到组装过程的不确定性。这就是目前工作的原因。