This book reports thermo-mechanical coupling constitutive equations and impact damage distributions of 3-D braided composite materials under impulsive loadings, in multidisciplinary fields among mechanical engineering, textile engineering and impact dynamics. The 3-D braided composite is one of the unique textile composites with integrated braided preform structure. Currently the 3-D braided composite has been rapidly applied to aerospace, automotive and medical engineering because the materials could realize the integration of material structure to manufacture complex structural parts and reduce the number of assembly connections. This book presents a thermo-mechanical coupled multiscale geometrical model of the 3-D braiding composite beams and tubes for analyzing damage mechanisms under various impact velocities. Impact deformation and damage morphologies have been described both in experimental observations with high speed cameras, micro-CT and finite element analyses. All theimpact damages are shown in figures for unveiling the relationships between microstructure and failure modes. This provides a vivid way for how to design braided structures with high impact damage tolerance. The book is intended for graduate students who are interested in composite materials and mechanics, researchers investigating on impact dynamics of composite structure design, and engineers working on impact-proof structure design. The English translation of this book from its Chinese original manuscript was done with the help of artificial intelligence (machine translation by the service provider DeepL.com). A subsequent human revision of the content was done by the author.

Dr. Meiqi Hu received her B.E. degree and Ph.D. degree both from School of Textiles, Donghua University, Shanghai, China, in 2015 and 2020, respectively. Now she is assistant professor in School of Textiles, Donghua University. Dr. Hu is an active principal investigator in manufacturing and researches in textile composite materials, specifically, in 3-D textile composites design. Currently her interesting is in 3-D braided composite manufacturing, multiscale geometrical impact damage mechanisms in wide range temperature environments.
Dr. Bohong Gu is Changjiang Chair Professor and Dean of College of Textiles, Donghua University, Shanghai, China. Prof. Gu is focused on design and mechanics of textile composite materials. He has published more than 200 papers in international peer-reviewed journals and 4 monographs on textile composite materials and textile engineering. He was awarded National Prize on Science and Technology, National Excellent PhD Supervisor and others prizes from Ministry of Education, China, and local governments, businesses, civil groups. Now his interesting is in coupling responses of textile composites under multiple external loadings.

Chapter 1: Literature review.- Chapter 2: Thermo-mechanical coupling constitutive equations of braided composites.- Chapter 3: Multi-scale geometrical model of 3-D braided composites.- Chapter 4: Transverse impact of braided beams.- Chapter 5: Transverse impact of braided tubes.- Chapter 6: Axial impact damages of braided tubes at room temperature.- Chapter 7: Axial impact damages of braided tubes at low temperature.- Chapter 8: Multiscale structure mechanisms on transverse impact damages in beams.- Chapter 9: Multiscale structure mechanisms on axial compressive impact damages.- Chapter 10: Impact strength with thermo-mechanical coupling effect.- Chapter 11: Summary.