Patent ID: 8528862
Filing Date: 2013-09-10
Classification: B29C,B29D,B29K,B32B,B64C,F16F,Y02T,Y10T

Abstract:
1. A method of manufacturing a structural assembly with a damping system for noise reduction, the method comprising: attaching a first stiffener portion of a stiffener to a skin, the stiffener having a second stiffener portion offset from the skin, the second stiffener portion having a first width; attaching a strip of auxetic core to the second stiffener portion, wherein the auxetic core includes a honeycomb material that expands in a first direction when stretched in a second direction perpendicular to the first direction, the strip of auxetic core having a second width that is at least approximately the same as the first width, the strip of auxetic core further having a first surface facing at least approximately toward the stiffener and a second surface facing at least approximately away from the stiffener; covering at least a portion of the second surface of the auxetic core with a damping layer; and attaching a constraining layer to the auxetic core by sandwiching the damping layer between the second surface of auxetic core and the constraining layer.