Abstract: A computer-implemented method that facilitates determining ply-by-ply damage in a composite structure comprises receiving, by a computing system, a geometric model that specifies geometric aspects of a composite structure. The geometric model facilitates the performance of finite element analysis (FEA). FEA logic of the computing system applies each of a plurality of material failure models (MFMs) to the geometric model to predict different types of damage to the composite structure due to an applied force or stress. Each MFM relates a force or stress applied to a material to a particular type of damage to the material. The machine learning logic predicts, based on each of the predicted different types of damage, an aggregate prediction of damage to the composite structure.

Abstract: A hybrid contoured load-spreading washer is disclosed. An illustrative embodiment of the washer includes a washer body having a composite layer and a metal layer bonded to the composite layer and a fastener opening extending through the washer body. A floor beam seat track attachment assembly and a method of transmitting a load from a seat track to a floor beam web in a seat track attachment assembly are also disclosed.

Abstract: A hybrid contoured load-spreading washer is disclosed. An illustrative embodiment of the washer includes a washer body having a composite layer and a metal layer bonded to the composite layer and a fastener opening extending through the washer body. A floor beam seat track attachment assembly and a method of transmitting a load from a seat track to a floor beam web in a seat track attachment assembly are also disclosed.

Abstract: A hybrid contoured load-spreading washer is disclosed. An illustrative embodiment of the washer includes a washer body having a composite layer and a metal layer bonded to the composite layer and a fastener opening extending through the washer body. A floor beam seat track attachment assembly and a method of transmitting a load from a seat track to a floor beam web in a seat track attachment assembly are also disclosed.

Abstract: A hybrid contoured load-spreading washer is disclosed. An illustrative embodiment of the washer includes a washer body having a composite layer and a metal layer bonded to the composite layer and a fastener opening extending through the washer body. A floor beam seat track attachment assembly and a method of transmitting a load from a seat track to a floor beam web in a seat track attachment assembly are also disclosed.

Abstract: A face panel system for forming an exposed face on a fill structure employs a succession of precast reinforced concrete panels which act first as a restraining form and then as a permanent exposed face for the structure. In one embodiment, successively higher rows of panels are supported by strongbacks mounted to a lower row of panels and extending upward therefrom to act as temporary cantilevered supports for the next higher row. In this manner, horizontal forces exerted by the fill mass are transferred back to the mass. Another embodiment features an internal cantilever support structure embedded in the panels, which are coupled together with brackets extending therefrom.