| 摘要 |
PROBLEM TO BE SOLVED: To provide a honeycomb structure in which a ring crack hardly occurs.SOLUTION: A honeycomb structure 100 includes a honeycomb substrate 4, and a projection 10 which is a ring-shaped projection continuously or intermittently surrounding at least a part of the outer periphery of the honeycomb substrate 4 in a ring shape. A part of the surface of the projection 10 forms a flat surface part 15 which is a flat surface parallel to an extending direction of cells 2. The flat surface part 15 has in its surface one or a plurality of stress relieving parts 17, each of which is a split having an opening part, and the total length of all the stress relieving parts 17 is 3% or more of the length of the outer periphery of the honeycomb substrate 4. |
