2019年12月5日上午，应彭华新教授邀请，英国皇家工程院院士、布里斯托复合材料研究所所长Michael R. Wisnom教授来我院交流，并给我院师生带来题为“Current challenges in predicting failure of advanced composites”的精彩报告。Michael R. Wisnom教授是纤维增强复合材料力学和失效领域的著名专家，长期从事复合材料的失效分析、利用有限元分析理解和预测负载材料的行为和结构方面的研究。
Michael R. Wisnom教授作相关报告
报告中，Wisnom教授首先对失效及其定义进行介绍，指出复合材料的失效概念与其应用目的密切相关。若考虑漏损，则应考虑任何一个基体裂纹的问题；若考虑极限承载能力，甚至可在允许接受的损坏程度内提高强度，而不能单纯使用测试报告中的数据。
Michael R. Wisnom教授作相关报告
随后，Wisnom教授详述了复合材料的压缩试验和弯曲试验中的失效问题。Wisnom教授讲道，为避免传统压缩测试中，样品因夹持而过早失效，应采用替代测试方法以获得可靠实验数据；在弯曲试验中，样品尺寸效应和应变梯度对试验均有显著影响，同时，控制失效时的离散分层和分裂、本征及后加工缺陷都非常重要；在混合玻璃/碳测试中，高模量和高强度碳纤维复合材料的混合会产生应变梯度效应问题。最后，Wisnom教授总结了当今复合材料失效测试所面临的一系列挑战。
Michael R. Wisnom教授作相关报告
Michael R. Wisnom教授与同学交流
彭华新教授为Michael R. Wisnom教授颁发纪念奖牌
附报告人简介：
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.
