A Review on the Mechanical Modeling of Composite Manufacturing Processes

© 2016, The Author(s). The increased usage of fiber reinforced polymer composites in load bearing applications requires a detailed understanding of the process induced residual stresses and their effect on the shape distortions. This is utmost necessary in order to have more reliable composite manufacturing since the residual stresses alter the internal stress level of the composite part during the service life and the residual shape distortions may lead to not meeting the desired geometrical tolerances. The occurrence of residual stresses during the manufacturing process inherently contains diverse interactions between the involved physical phenomena mainly related to material flow, heat transfer and polymerization or crystallization. Development of numerical process models is required for virtual design and optimization of the composite manufacturing process which avoids the expensive trial-and-error based approaches. The process models as well as applications focusing on the prediction of residual stresses and shape distortions taking place in composite manufacturing are discussed in this study. The applications on both thermoset and thermoplastic based composites are reviewed in detail

Fortschrittliche Robotersteurerungstechnik. Teilprojekte 1, 2, 3 und 4 Abschlussbericht

The report summarizes the results of four partial projects: (i) integration of robot control in cim systems, (ii) overallstructure and interfaces of robot control systems, (iii) movement control of future robot systems, (iv) interaction interfaces, operation and programming. The cim robot control is provided with MAP 3.0 and comprises the information flow from the instruction up to the movement control including diagnosis. The interaction of computer and robot systems has been manifested by means of a demonstrator. Data transfer and communication technique in the direct robot environment was realized in the solution BITBUS. Improvements in the movement control was achieved by rapid processing of sensor data, enlargement of sensor control funtionality, methods of axial load adaption, improvement of the dynamic properties of axial control circuits, collision-avoiding path planning and improved path accuracy. Solutions are described for central operation as well as for off-line programming of the robot. New sensor-programming tools are used for exact robot programming following the off-line programming. (WEN)Available from TIB Hannover: F97B759 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman