清华大学发布讣告：余寿文同志逝世

Core Viewpoint - The article announces the passing of Yu Shouwen, a prominent figure in solid mechanics and engineering education, highlighting his significant contributions to academia and the engineering field [1][4]. Contributions to Solid Mechanics - Yu Shouwen provided a complete continuous solution for the stress field at the crack tip of ideal plastic materials and clarified the structure of the crack tip field at the interface of power-hardening dual materials [2]. - He established a new fracture criterion that considers both plasticity and damage dissipation, which has been incorporated into national standards for the safety assessment of defective pressure vessels, providing critical theoretical support for major engineering structures [2]. - His research in micro-crack propagation and damage models led to the development of a three-dimensional mesoscopic damage mechanics theory for quasi-brittle materials [2]. Achievements in Education and Research - Yu Shouwen published seven monographs and over 400 academic papers, receiving multiple awards including two third prizes of the National Natural Science Award and a special prize for scientific and technological progress [2]. - He played a pivotal role in the development of higher engineering education in China, advocating for the establishment of the engineering education certification system and contributing to China's entry into the Washington Accord [3]. Legacy and Impact - His rigorous academic approach and dedication to education resulted in the cultivation of numerous talented individuals, many of whom became leading scholars and academicians [3]. - Yu Shouwen's passing is regarded as a significant loss for Tsinghua University and the fields of mechanics and education in China [4].