When should Thin shells be used based on thickness-to-span ratio?

Thin shells should be considered for use when the thickness-to-span ratio is less than 0.05. This specific ratio indicates that the structural element is significantly thinner relative to its span, which is essential for achieving the unique benefits associated with thin shell structures.

Thin shells are known for their efficiency in material use and ability to distribute loads evenly across their surfaces. When the thickness is kept small compared to the overall width (span), the shell can effectively contribute to their structural integrity and resistance to bending, relying on their geometry rather than sheer material strength.

In engineering terms, maintaining a thickness-to-span ratio of less than 0.05 ensures that the shell behaves as a shell structure rather than a solid one, optimizing its strength through geometric means rather than relying on bulk. This configuration is crucial for applications where lightweight construction and material savings are important, such as in roofs, tanks, and aerospace structures.