“Quilted Stratum Process” (QSP ®) is a new process in the category of thermoplastic composite forming with the objective to locally strengthen the composite parts by strategically stacking discontinuous UD/woven prepregs while maintaining the short cycle time of about 1 min. Interply adhesion arising due to polymer tack plays an important role in QSP ® due to the presence of resin-rich layer at the ply-ply interface, inability to use blank holders for prepreg patches and high temperature of forming process where the resin is in melt state. Without modeling interply adhesion in the numerical simulation of their forming, plies delaminate unrealistically without any resistance which in turn results in incorrect final positions of the prepreg patches. Thus, a penalty based, semi-empirical contact model for interply adhesion has been developed and implemented in the industrial finite element code of Altair RADIOSS ™. This model allows sliding of plies over long distance while providing a finite adhesive strength before delamination. It requires minimal characterization for which a measurement method is proposed. The usage of this model in a full scale numerical simulation showed that the final ply positions were predicted with a much better accuracy. Also, the predictions of fibre orientations within individual plies are in good agreement with the experimental observations.

“ Quilted Stratum Process”（QSP®）是热塑性复合材料成型领域中的一种新工艺，其目的是通过策略性地堆叠不连续的UD /编织预浸料，同时保持约1分钟的短循环时间，局部增强复合材料零件。由于聚合物粘性而产生的层间粘合力在QSP®中起着重要作用，这是由于在层-层界面处存在富树脂层，无法将坯料保持架用于预浸料片以及树脂处于熔融状态的高温成型过程州。如果在模型的形成过程的数值模拟中没有对层间粘合进行建模，则层会不切实际地分层，而不会产生任何阻力，从而导致预浸料片的最终位置不正确。因此，基于罚款 用于层间粘合的半经验接触模型已经开发并在Altair RADIOSS™的工业有限元代码中实现。该模型允许层板在远距离上滑动，同时在分层前提供有限的粘合强度。它要求最小的特征，为此提出了一种测量方法。在全面的数值模拟中使用该模型表明，最终层的位置预测具有更高的精度。而且，单个层中纤维取向的预测与实验观察结果非常吻合。它要求最小的特征，为此提出了一种测量方法。该模型在全面数值模拟中的使用表明，最终层的位置预测具有更高的精度。而且，单个层中纤维取向的预测与实验观察结果非常吻合。它要求最小的特征，为此提出了一种测量方法。该模型在全面数值模拟中的使用表明，最终层的位置预测具有更高的精度。而且，单个层中纤维取向的预测与实验观察结果非常吻合。