Analytical Model for Single-Side Patch Design of Composite Repair
Kwon, Young W.
Lee, Woo Y.
MetadataShow full item record
A study was undertaken to develop an analytical model that can be used for patch designs of cracked plates using the single-side composite patch. The model helps to select a patch material (i.e., elastic modulus of the material) and the patch thickness in order to reduce the Strain Energy Release Rate (SERR) at the crack tip. In other words, in order to achieve the desired SERR using the single-side patch, the analytical model can be utilized to find a proper patch material and patch dimensions for the given cracked plate if the plate modulus and thickness as well as the crack size are known. The model is based on the axial and bending stresses of the single-side strap joint, and those stresses are related to the SERR at the crack tip of a plate with a single-side patch repair. In order to verify the analytical model, finite element analyses were conducted to determine stresses as well as SERR in many different patched plates. The numerical study confirmed the validity of the analytical model to predict the reduced SERR resulting from the single-side patch repair.
NPS Report NumberNPS-MAE-13-001
Showing items related by title, author, creator and subject.
Kirkpatrick, Gary W. (Monterey, California. Naval Postgraduate School, 1999-06);The deleterious effects of fretting on the fatigue properties of a material have been known since the work of Warlow-Davies in 1941. However, a widely accepted fretting fatigue life prediction method still does not exist ...
Jerauld, Joseph G. (Monterey, California. Naval Postgraduate School, 1998-03-01);Flaws in structural elements release strain energy in the form of stress waves that can be detected through acoustical emission techniques. The transient nature of a stress wave is analytically inconsistent to Fourier ...
An investigation of methods for determining notch root stress from far field strain in notched flat plates. Garske, John Charles (Monterey, California: Naval Postgraduate School, 1977-09);Notched flat plate specimens have been tested to examine Neuber's equation and other relations with respect to their application in the determination of stresses in the plastic range at the notch root when the far field ...