T-Igel® metal-to-composite connection for the safe transmission of loads

With its T-Igel® technology, TEUFELBERGER has developed an innovative connection technology to market readiness. It is superior to conventional adhesive bonded and riveted connections, both technologically and economically.

Connection systems constitute one of the pivotal technologies for cost-efficient multi-material lightweighting. They ensure that "the right lightweighting material" can be used in "the right place".

The secret behind the success of hybrid lightweighted systems is simple. In fact, it is the implementation of highly loadable, safe, and easy-to-qualify connections. And all that at the interface between fiber reinforced plastics having direction-dependent material properties and metals having non-direction-dependent properties.

This is where TEUFELBERGER, with its T-IGEL® technology, sets new standards in connection techniques.

In a fully automated manufacturing process, a regular, dense structure of high-strength pins is applied to a basic metallic body (steel, aluminum, titanium) in conformity with the load distribution in the component. This regular pin structure is integrated into a dry braided or wound structure in our factory and consolidated into a hybrid composite component by means of RTM.

T-IGEL® can also be integrated into the filament winding process and, under certain conditions, into a pre-impregnated laminate structure by means of prepregs. Due to the high reliability and firmness of this connection and its excellent failure predictability, T-IGEL® is particularly well suited to transmit forces into structural fiber composite components.

TEUFELBERGER is your competent go-to partner for the development and production of carbon fiber reinforced structural components and the necessary connection technology.

 The advantages of TEUFELBERGER's T-Igel® technology at a glance

  • Adhesive bonding (via the RTM epoxy resin) combined with form fit (between pins and fibers) helps achieve connection strengths of up to 60N/mm2 and high safety factors.
  • Structurally quantifiable connection due to known scaling of shear strengths of the individual pins. Virtually independent of ambient conditions. This makes shorter connection lengths and thus lighter designs possible.
  • The fully automated process used to apply the pins works with stainless steels and aluminum and permits a flexible pin geometry (thickness, length, shape). Therefore, the connection can be attuned exactly to the load specification. Also, because of its great ease of integration into the fiber composite, is considerably less expensive than structural adhesive bonding.
  • Predictable and more plastic failure behavior. 

T-Igel® was developed by TEUFELBERGER especially for hollow closed end piece cross-sections (circles, polygons) and has been patented for integration with braiding and winding technology. Areas of application for this one-of-a-kind connection technology can be found in all segments of lightweight engineering. Depending on the field of use, T-Igel® is designed with internal or external threads, as tab, eye, metal sheet, fork finger (etc.).