突发讣告！余寿文逝世，是重大损失

Core Viewpoint - The article commemorates the life and contributions of Yu Shouwen, a prominent solid mechanics expert and educator, who passed away on December 5, 2025, at the age of 86, highlighting his significant impact on engineering education and solid mechanics research in China [2][6]. Group 1: Academic Contributions - Yu Shouwen made substantial contributions to solid mechanics, particularly in fracture and damage mechanics, smart materials, and microscale mechanics, achieving internationally influential and original results [4]. - He provided a complete continuous solution for the crack tip field of plane stress type I ideal plastic materials and established new fracture criteria considering both plasticity and damage dissipation [4]. - His research has been incorporated into national standards for safety assessment of defect-containing pressure vessels, providing critical theoretical support for major engineering structures [4]. Group 2: Publications and Awards - Yu 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 National Science and Technology Progress [5]. - He served as the first Chinese president of the International Society of Fracture from 2013 to 2017 and was awarded the "YOKOBORI Gold Medal" in 2023 for his significant contributions [5]. Group 3: Educational Impact - As a vice president of Tsinghua University, Yu implemented significant reforms in engineering education, including the credit system and curriculum development, and contributed to the establishment of a robust engineering education certification system in China [5]. - He was a key advocate for China's engineering education to join the Washington Accord, receiving the "Global Engineering Education Outstanding Contribution Award" in 2012 [5].