Delaminations in composite plates under transverse static or impact loads

Miscellaneous · Tue Jan 01 00:00:00 EST 1991

OSTI ID:7203489

Finn, S R

A method is presented for calculating the locations, shapes, and sizes of delaminations which occur in a fiber reinforced composite plate subjected to transverse static or dynamic (impact) loads. The plate may be simply supported, clamped, or free along its edges. A failure model of the delamination formation was developed. This model was then coupled with a finite element analysis. The model and the finite element analysis were then implemented by a computer code (IMPACT-ST) which can be used to estimate the load at which damage initiates as well as the locations, shapes, and sizes of the delaminations. Test were also performed measuring the geometries of delaminations in Fiberite T300/976 graphite-epoxy, Fiberite IM7/977-2 graphite-toughened epoxy, and ICI APC-2 graphite-PEEK plates subjected to transverse static and impact loads. The data were compared to results of the model and good agreements were found between the measured and calculated delamination lengths and widths.

• Research Organization: Stanford Univ., CA (United States)
• OSTI ID: 7203489
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON FIBERS
FAILURES
COMPOSITE MATERIALS
EPOXIDES
POLYMERS
DAMAGE
DYNAMIC LOADS
FINITE ELEMENT METHOD
MATHEMATICAL MODELS
PLATES
REINFORCED MATERIALS
STATIC LOADS
FIBERS
MATERIALS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
360603* - Materials- Properties