'''Extreme Loading for Structures''' ('''ELS''') is commercial structural-analysis software based on the [[applied element method]] (AEM) for the automatic tracking and propagation of cracks, separation of elements, element collision, and collapse of structures under extreme loads.<ref name="AEMTheory">{{cite journal | authors author1=Meguro, K. and |author2=Tagel-Din, H. | title = Applied element method for structural analysis: Theory and application for linear materials | journal = Structural engineeringEngineering/earthquakeEarthquake engineeringEngineering | volume = 17 | issue = 1 | pages = 21–35 | publisher = Japan Society of Civil Engineers | ___location = Japan | year = 2000 | url = http://sciencelinks.jp/j-east/article/200014/000020001400A0511912.php | id = F0028A | accessdate = 2009-08-10 | url-status = dead | archiveurl = https://web.archive.org/web/20120229032846/http://sciencelinks.jp/j-east/article/200014/000020001400A0511912.php | archivedate = 2012-02-29 }}</ref> AEM combines features of [[Finite element method]] and [[Discrete element method]] simulation with its own solver capabilities for the generation of PC-based structural analysis.
