On the morning of December 5, 2019, at the invitation of Professor Huaxin Peng, Professor Michael R. Wisnom, Academician of the Royal Academy of Engineering and Director of the Institute of Composite Materials in Bristol, came to our school for exchanges and brought the topic Current challenges in predicting failure of advanced composites. Professor Michael R. Wisnom is a well-known expert in the field of mechanics and failure of fiber-reinforced composite materials. He has long been engaged in the failure analysis of composite materials and the use of finite element analysis to understand and predict the behavior and structure of loaded materials.
Professor Michael R. Wisnom made a related report
In the report, Professor Wisnom first introduced the failure and its definition, and pointed out that the failure concept of composite materials is closely related to its application purpose. If leakage loss is considered, any problem of matrix cracks should be considered; if the ultimate bearing capacity is considered, the strength can even be increased within the acceptable degree of damage, instead of simply using the data in the test report.
Professor Michael R. Wisnom made a related report
Subsequently, Professor Wisnom detailed the failure problems in the compression test and bending test of composite materials. Professor Wisnom said that in order to avoid premature failure of samples due to clamping in traditional compression tests, alternative test methods should be used to obtain reliable experimental data; in bending tests, sample size effects and strain gradients have a significant impact on the test. At the same time, it is very important to control the discrete delamination and splitting, intrinsic and post-processing defects at the time of failure; in the mixed glass/carbon test, the mixing of high modulus and high strength carbon fiber composites will cause strain gradient effects. In the end, Professor Wisnom summarized a series of challenges facing the failure testing of composite materials today.
Professor Michael R. Wisnom made a related report
Professor Michael R. Wisnom communicates with students
Professor Huaxin Peng presented a commemorative medal to Professor Michael R. Wisnom
Attached brief introduction of the speaker:
Michael Wisnom is Professor of Aerospace Structures at the University of Bristol. He is Director of Bristol Composites Institute (ACCIS), which builds on the work of the Advanced Composites Collaboration for Innovation and Science which he founded in 2007. He is a leading expert on the mechanics and failure of fibre reinforced composites, with over 400 published papers. He is a member of the steering board of the UK National Composites Centre, Editor in Chief and European Editor for Applied Science and Manufacturing of the international journal Composites Part A, and was Director of the Rolls-Royce Composites University Technology Centre from 2007-2017. He is a Fellow of the Royal Academy of Engineering, of the Institution of Mechanical Engineers and of the American Society for Composites. Professor Wisnom was the recipient of a Royal Society Wolfson Research Merit Award and is a past President of the International Committee on Composite Materials.
