The project Models for vulnerability and lethality modelling is part of the Armed Forces research program. The aim of the project is to develop new or implement identified models that describe relevant phenomena of interest in a vulnerability- or lethality (V/L) analysis on a platform level. The project started in 2017 with the purpose of making use of the existing knowledge at FOI on specific phenomena related to the interaction between warheads and protected platforms by implementing it in V/L analysis. The work performed during 2018 is continuing the efforts started during 2017. The main topics studied are: models for initiation of ammunition, models for shaped charges in complex protection systems and analytical models for fragment penetration, models for secondary fragments behind armor, review of V/L models for vehicle mines, review of V/L models for active protection systems (APS), This annual report gives a brief description of the topics above and other efforts performed by the project during 2018.