A NUMERICAL AND EXPERIMENTAL INVESTIGATION ON DELAMINATION BUCKLING BEHAVIOR IN LAMINATED COMPOSITES UNDER COMPRESSIVE LOAD

摘要

Delamination in laminated composites is one type of failure that has long been the centre of materials research. The failure is known due to separation at an interphase region, caused by manufacturing defects, object impacts, or high stress concentrations from geometrical discontinuity. Its occurrence can result in significant loss in the structural stiffness, especially under compressive load, and is dangerous because it often occurs inside the components, thus difficult to detect from the surface until catastrophic failure is imminent. Along with the increasing use of advanced composites in structural applications, delamination problems have been of considerable interest and concerns recently.