Tailored Blanks

Start / End:

January 2015 to January 2019


University of Twente
Faculty of Engineering Technology
Chair of Production Technology
P.O. Box 217
7500 AE Enschede
The Netherlands
E-mail: t.k.slange[a]

Palatijn 15
7521 PN Enschede
P.O. Box 770
7500 AT Enschede
The Netherlands
Phone: +31 888773815
E-mail: tjitse.slange[a]


This project is funded by the Thermoplastic Composite Research Centre (TPRC). The support of the Region Twente and the Gelderland & Overijssel team for the TPRC, by means of the GO Programme EFRO 2007-2013, is gratefully acknowledged.


Stamp forming is a rapid forming technology used to form flat blanks of thermoplastic composite material into three dimensional components. The application of stamp forming currently mainly concerns secondary parts of limited complexity. Typically, the parts have simple geometries, with uniform thickness and uniform fiber orientation. Further optimized designs are required to extend the application of thermoplastic composite materials to structurally loaded primary parts, increase weight savings and reduce costs. These designs require tailored lay-ups in terms of thickness and fiber orientation with respect to their application. The application of these tailored blanks will lead to cost and weight savings and increased part performance.


The performance of a stamp formed component is largely governed by its consolidation quality. Some of the most important properties that govern the consolidation quality are void content, interlaminar bond strength, crystallinity and polymer degradation. These properties strongly depend on the thermal and pressure history of the component. Consequently, the consolidation quality may improve or deteriorate during processing of the material and may, as a consequence of the non-uniform thickness, vary from place to place.


In order to manufacture high quality tailored components in a cost-effective and energy-efficient manner optimization of the stamp forming processes is required. For this purpose an integrated process design tool needs to be developed that is able to predict the final consolidation quality based on the processing and material parameters and the initial state of the material.