Abstract
This paper defines the adjustable domain of placement posture during automatic fiber placement process and determines the critical size of the adjustable domain under the constraints of placement quality. The influence of the posture deflection on the placement quality is analyzed first, and compaction and slippage of tows are determined as the main constraints. Simulation models of tow compaction under variable deflection angles are established, and the influence of deflection angle and direction on tow compaction is analyzed. The friction coefficient is measured by experiments to characterize the friction behavior of the tow, and a tow slip criterion was established to avoid unacceptable defects. Combining the above constraints, posture adjustable domain is obtained and the influence of various parameters is analyzed. A searching method is established to calculate the collision-free posture in the adjustable domain and applied on a complex mold surface. The results show that the posture adjustable domain can effectively ensuring the placement quality when the placement head is deflected to avoid collision.
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