A failure module includes a support element. A reinforcing element is disposed on the support element. The support element is chemically compatible with the reinforcing element. A homogeneous chemical bond is formed between the support element and the reinforcing element.

Described are joint designs, tooling, and molding methods for a hollow object, such as an automobile bolster. The methods and structures provide a process and system that facilitates mold alignment, part alignment, material strength, design adaptability, efficient processing, reduced labor, increased production rates, reduced energy consumption per part, aesthetically pleasing surfaces, and reduces or eliminates the need for welding.

A leg support includes a support element. A reinforcing element is disposed on the support element. The support element is chemically compatible with the reinforcing element. A homogeneous chemical bond is formed between the support element and the reinforcing element.