Separation device assemblies

A separation device assembly comprising:

• a plurality of first segment elements, each first segment element having an attachment portion and a frangible portion, the attachment portion of the first segment elements is arranged to fixedly connect to a first structural component;
• and
• at least one second segment element having an attachment portion and a securing portion, wherein the attachment portion of the at least one second segment element is arranged to fixedly connect to a second structural component;
• wherein at least two of the plurality of first segment elements are attached to the at least one second segment element adjacent to each other, wherein a first segment joint is formed between adjacent first segment elements;
• wherein an expansion device cavity is formed between the attached first and second segment elements;
• wherein the at least one second segment element comprises a plurality of second segment elements;
• and
• wherein a first segment joint is formed between adjacent first segment elements and a second segment joint is formed between adjacent second segment elements, and wherein when the first segment elements are attached to the second segment elements, the first segment joints do not align with the second segment joints.