Design and Experimental Validation of a Mixed-Mode Crack Arrest Specimen

Bruun, Erik; Cheung, Chi Ho Eric; Gray, Phillip; Lin, K. Y.

doi:10.2514/6.2012-1696

Cited by 6 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The specimen width was chosen as 5D or 1.25 inches. 1 The specimens were tested in tension with the crack tip tracked visually. The specimen was painted white to enhance the crack tip visibility and a 0.1 inch scale was marked on the side.…”

Section: A Experimental Specimen Specificationsmentioning

confidence: 99%

Analytical and Experimental Studies on Delamination Arrest Features in Aircraft Composite Structures

Richard

Lin

2015

56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Self Cite

View full text Add to dashboard Cite

Delamination is the critical damage type for integrated carbon fiber structures, which are employed in primary aircraft structures. In order to minimize the danger, one common solution is to install fasteners, clamping the laminate together and partially arresting the delamination. Current research has indicated that multiple fasteners installed in series do not fully arrest delaminations, instead merely slowing and redirecting the propagation of the crack, first by compressing the lamina together and second by transferring load via shear engagement of the fastener. Additional work has found that fastener spacing can be increased beyond the typical spacing of 5 fastener diameters; experimental and computational studies have indicated that the failure mode can be shifted away from delamination under both static and fatigue loading even with a significantly greater fastener spacings. NomenclatureD = Fastener Diameter = Crack growth per cycle = Total Strain Energy Relase Rate = Critical Total Strain Energy Release Rate = Mode I Strain Energy Release Rate = Mode II Strain Energy Release Rate = Critical Mode I Strain Energy Release Rate = Critical Mode II Strain Energy Release Rate

show abstract

Section: A Experimental Specimen Specificationsmentioning

confidence: 99%