Coupled instabilities is a fascinating field of research with a wide range of practical applications, particularly in the analysis and design of composite material, surfaces and metal structures. Despite the excellent body of existing results concerning coupled instability structural behaviour, this situation has not yet been adequately translated into design rules or specifications. In fact, only to a small extent do modern design codes for composite and structures take advantage of the significant progress made in the field. The availability of reliable numerical and experimental techniques and methods will certainly help to overcome these shortcomings by providing a means to increase the material and structural operational safety and give them a technological added value. Therefore, The central aim of this mobility research proposal is to develop new modelling, characterization strategies and tools for an adequate representation of wrinkling phenomena. The proposed research is articulated in the following three points: (1) development of effective analytical and numerical techniques for the modelling and simulation of wrinkling phenomena with application to sandwich structures, thin sheet metals and long fibre reinforced composites, (2) development of accurate continuum approaches and multi-scale approaches (Bridging Domain Methods) and (3) experimental study of thin metal sheet wrinkling. This research proposal is, definitely, both concept and need-driven establishing a closed loop of theoretical and experimental investigations. Thanks to the complementary knowledge and skills possessed by the involved researchers (Dr. Belouettar and Prof. Hu) at the involved institutions, the research carried out during the secondment will increase the understanding of the wrinkling phenomenon and result in the formulation of accurate continuum mechanics models and numerical methods for the design of these structures on one side and the proposition of innovative solutions on the other one. In addition, the research project will enable home and host Institutions to set a long-term collaboration up by the exchange of researchers, Ph.D. and master students. The Intellectual Merit of the proposed activity consists in the multi-scale and multi-domain methodology for the analysis of coupled instability phenomena. The Intellectual Merit lies also in the newly-acquired ability to develop and apply our understanding of the underlying local instabilities phenomena to design new material, structures and surfaces with optimised and improved properties. The Broader Impact of the proposal involves a combination of research and education, conference and workshop planning and infrastructure development and enhancement and technology transfer. We propose a significant contribution to education since one PhD and two Master students will be involved in this research (one PhD and one Master student funded by Wuhan University and one Master student funded by Tudor) will actively participate to this international research work. Lastly, this project will contribute to substantially develop and enhance the international recognition of Tudor competencies in the area of computational structural mechanics and related areas. The collaboration with Wuhan University will increase the value-added scientific wealth of this international network through the sharing of highly sophisticated and cutting-edge techniques and modelling tools, which will contribute to the development of superior technical skills for both CRP Henri Tudor and increase the diversity of the project.