2019年12月5日上午，應彭華新教授邀請，英國皇家工程院院士、布里斯托復合材料研究所所長Michael R. Wisnom教授來我院交流，并給我院師生帶來題為“Current challenges in predicting failure of advanced composites”的精彩報告。Michael R. Wisnom教授是纖維增強復合材料力學和失效領域的著名專家，長期從事復合材料的失效分析、利用有限元分析理解和預測負載材料的行為和結構方面的研究。
Michael R. Wisnom教授作相關報告
報告中，Wisnom教授首先對失效及其定義進行介紹，指出復合材料的失效概念與其應用目的密切相關。若考慮漏損，則應考慮任何一個基體裂紋的問題；若考慮極限承載能力，甚至可在允許接受的損壞程度內提高強度，而不能單純使用測試報告中的數據。
Michael R. Wisnom教授作相關報告
隨后，Wisnom教授詳述了復合材料的壓縮試驗和彎曲試驗中的失效問題。Wisnom教授講道，為避免傳統壓縮測試中，樣品因夾持而過早失效，應采用替代測試方法以獲得可靠實驗數據；在彎曲試驗中，樣品尺寸效應和應變梯度對試驗均有顯著影響，同時，控制失效時的離散分層和分裂、本征及后加工缺陷都非常重要；在混合玻璃/碳測試中，高模量和高強度碳纖維復合材料的混合會產生應變梯度效應問題。最后，Wisnom教授總結了當今復合材料失效測試所面臨的一系列挑戰(zhàn)。
Michael R. Wisnom教授作相關報告
Michael R. Wisnom教授與同學交流
彭華新教授為Michael R. Wisnom教授頒發(fā)紀念獎牌
附報告人簡介：
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.
