Collapse tests on nine mild steel corrugated bulkhead models having five bays of corrugations were carried out, varying the corrugation angle, the plate thickness and the type of loading (axial compression and / or lateral pressure). The detailed results were published in Journal of Ship Research, Vol.41, No.4, 1997. A total of six double skinned structural models, namely four mild steel models and two aluminum alloy models, have been tested in a quasi-static loading condition, varying the plate thickness and the initial colliding location. The mild steel models were designed to represent side or bottom structures typical in double hull tankers or LNG carriers. The aluminum alloy models were designed to examine the internal mechanics in collision and grounding of aluminum alloy hull vessels for future designs. A same type indentor with a conical shape regarded as a striking body was used for the tests of all models.   http://saos.edmgr.com http://www.kosori.org