Method of manufacturing a composite structure and composite structure obtained thereby

A method of manufacturing a containment case for a gas turbine engine, wherein the containment case comprises an annular housing and a flange which is positioned at an end of the housing and projects radially away from the housing, the method comprising the steps of:

• laying-up a main annular zone of composite material on an outer peripheral surface of a mould, wherein the shape of the main zone corresponds to the shape of the annular housing of the containment case and the composite material of the main zone includes tape laid in the circumferential direction of the mould;
• laying-up a secondary annular zone of composite material on the outer peripheral surface of the mould, wherein the composite material of the secondary zone is adjacent and integral with the composite material of the main zone and the composite material of the secondary zone includes tape laid at an oblique angle to the circumferential direction of the mould and tape laid at a perpendicular angle to the circumferential direction of the mould but does not include tape laid in the circumferential direction;
• forming the composite material of the laid-up secondary zone to form the flange of the containment case;
• and
• curing the composite material.