The stability of structures continues to be scientifically fascinating and technically important. Shell buckling emerged as one of the most challenging nonlinear problems in mechanics in the middle of the last century when it was first intensively studied. The subject has returned to life motivated not only by structural applications but also by developments in the life sciences and in the field of soft materials. The challenge is that shell structures are susceptible to dramatic load-carrying reductions due to relatively small imperfections in their geometry. Imperfections must be factored into buckling load estimations. Recent work on spherical shells subject to external pressure will be used to illustrate some of the new developments in shell stability. Buckling mode localization, imperfection-sensitivity, energy barriers for stability, and probing to establish the stability landscape will be discussed. EML Webinar speakers and videos are updated at https://imechanica.org/node/24098.

结构的稳定性在科学上仍然引人入胜，在技术上也很重要。上世纪初，壳屈曲成为力学中最具挑战性的非线性问题之一。由于结构应用以及生命科学和软材料领域的发展，该学科重返生活。面临的挑战是，由于其几何结构的相对较小的缺陷，壳体结构易于承受急剧的载荷降低。缺陷必须纳入屈曲载荷估算中。球壳在受到外力作用下的最新工作将用来说明壳稳定性的一些新发展。屈曲模式定位，缺陷敏感性，稳定性的能垒，讨论建立稳定态势的探索。EML网络研讨会的演讲者和视频在https://imechanica.org/node/24098上进行了更新。