What term describes a lay-up where the warp faces are oriented so that they are always in the same direction?

The term that describes a lay-up where the warp faces are oriented so that they are always in the same direction is stacking. Stacking refers to the process of arranging composite material layers in such a way that their fibers are aligned in the same orientation with respect to the part being manufactured. This can enhance specific mechanical properties, such as strength and rigidity, in the direction of the fiber alignment.

When materials are stacked with the warp faces consistently in the same direction, it ensures that the integrity of the composite structure is optimized for load-bearing applications. This technique is commonly used in aerospace applications, where the performance of materials is critical. Other terms, like layering or aligning, might refer to different methods of arranging materials but do not specifically capture the concept of maintaining a consistent orientation of warp faces. Sequential layering, while indicating the order of layers, does not emphasize the uniformity in the direction of the warp, which is central to the concept of stacking.