Patent ID: 8955290
Filing Date: 2015-02-17
Classification: B23B,B29C,B32B,Y10T

Abstract:
1. An aircraft structure comprising: a first facesheet and a second facesheet, each comprising a composite laminate; a core comprising a first core segment and a second core segment, the core being joined to and sandwiched between the first facesheet and the second facesheet, a joint being between the first core segment and the second core segment, the joint being sandwiched between the first facesheet and the second facesheet; and an arrestment feature configured to arrest propagation of an inconsistency, the arrestment feature wrapping at least partially around two sides of at least one of the first core segment and the second core segment at about the joint, and the first face sheet and the second facesheet each extending over the arrestment feature, wherein the arrestment feature wraps around two sides of the first core segment and two sides of the second core segment such that the first facesheet and the second facesheet are both in contact with portions of the arrestment feature, wherein the arrestment feature comprises a first wrap and a second wrap, wherein the first wrap and the second wrap both are generally C-shaped in cross section, wherein the first wrap covers three sides of the first core segment, and wherein the second wrap covers three sides of the second core segment; wherein at least one of a first composite strap overlies the joint, wherein the first composite strap is sandwiched between the first facesheet and both the first wrap and the second wrap and wherein at least one of a second composite strap overlies the joint, wherein the second composite strap is sandwiched between the second facesheet and both the first wrap and the second wrap; and wherein at least the first composite strap is placed in a first recess in contiguous first outer faces of the first core segment and the second core segment facing the first facesheet and the second composite strap is placed in a second recess in contiguous second outer faces of the first core segment and the second core segment facing the second facesheet.