The geometric stability of bonded structural parts, such as self-stiffened panels, is a critical issue in aeronautics. However, autoclave curing and bonding of large complex integrated primary structures often induce distortions compromising their geometric stability. Composite cure-induced strains and distortions have been extensively studied in the literature but the influence of the adhesive on these distortions has often been overlooked. More experimental data are therefore necessary to properly understand its influence on process-induced strains and its behaviour during cure. The present paper reports a wide range of new experimental investigations showing the non-negligible influence of the adhesive on cure-induced distortions of composite assemblies. The experimental data presented include post-cure distortion measurements, optical microscope imaging, micro-tomography imaging and FBG in-situ strain monitoring during an autoclave bonding process. These experiments demonstrate the impact of the adhesive film behaviour and of the manufacturing bonding process on final distortions and strains of composite assemblies.

粘合结构部件（例如自加强板）的几何稳定性是航空业的关键问题。但是，高压釜的固化和大型复杂集成初级结构的粘结通常会引起变形，从而损害其几何稳定性。复合材料固化引起的应变和变形已在文献中进行了广泛的研究，但粘合剂对这些变形的影响却常常被忽略。因此，需要更多的实验数据来正确理解其对过程引起的应变的影响及其在固化过程中的行为。本文报道了许多新的实验研究，这些研究表明粘合剂对固化引起的复合材料组件变形的影响不可忽略。提供的实验数据包括固化后的变形测量​​，高压灭菌器粘合过程中的光学显微镜成像，显微断层扫描成像和FBG原位应变监测。这些实验证明了粘合膜行为和制造粘合过程对复合组件最终变形和应变的影响。