Method for manufacturing structure and structure

A method for manufacturing a structural body comprising:

• a first winding step of forming a cylindrical inner laminate body by winding a plurality of first composite materials including first reinforcing fibers and an uncured first thermosetting resin around a mandrel;
• a first compressing step of compressing a circumference of the inner laminate body;
• a first heating step of heating the inner laminate body until the first thermosetting resin is completely cured;
• a second winding step of forming a cylindrical outer laminate body by winding a plurality of second composite materials including second reinforcing fibers and an uncured second thermosetting resin around a circumference of the inner laminate body being cured;
• a second compressing step of compressing a circumference of the outer laminate body;
• a preheating step of heating the outer laminate body to a state prior to complete curing of the second thermosetting resin;
• an extracting step of extracting the mandrel from the outer laminate body and the inner laminate body;
• and
• a main heating step of placing the outer laminate body and the inner laminate body in a molding die, and heating the outer laminate body until the second thermosetting resin is completely cured while pressurizing the outer laminate body to deform the outer laminate body.