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contributor authorK. N. Shivakumar
contributor authorW. Elber
contributor authorW. Illg
date accessioned2017-05-08T23:19:25Z
date available2017-05-08T23:19:25Z
date copyrightSeptember, 1985
date issued1985
identifier issn0021-8936
identifier otherJAMCAV-26258#674_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/99358
description abstractTwo simple and improved models — energy-balance and spring-mass — were developed to calculate impact force and duration during low-velocity impact of circular composite plates. Both models include the contact deformation of the plate and the impactor as well as bending, transverse shear, and membrane deformations of the plate. The plate was a transversely isotropic graphite/epoxy composite laminate and the impactor was a steel sphere. In the energy-balance model, a balance equation was derived by equating the kinetic energy of the impactor to the sum of the strain energies due to contact, bending, transverse shear, and membrane deformations at maximum deflection. The resulting equation was solved using the Newton-Raphson numerical technique. The energy-balance model yields only the maximum force; hence a less simple spring-mass model is presented to calculate the force history. In the spring-mass model, the impactor and the plate were represented by two rigid masses and their deformations were represented by springs. Springs define the elastic contact and plate deformation characteristics. Equations of equilibrium of the resulting two degree-of-freedom system, subjected to an initial velocity, were obtained from Newton’s second law of motion. The two coupled nonlinear differential equations were solved using Adam’s numerical integration technique. Calculated impact forces from the two analyses agreed with each other. The analyses were verified by comparing the results with reported test data.
publisherThe American Society of Mechanical Engineers (ASME)
titlePrediction of Impact Force and Duration Due to Low-Velocity Impact on Circular Composite Laminates
typeJournal Paper
journal volume52
journal issue3
journal titleJournal of Applied Mechanics
identifier doi10.1115/1.3169120
journal fristpage674
journal lastpage680
identifier eissn1528-9036
keywordsForce
keywordsComposite materials
keywordsLaminates
keywordsDeformation
keywordsSprings
keywordsEnergy budget (Physics)
keywordsEquations
keywordsMembranes
keywordsShear (Mechanics)
keywordsDegrees of freedom
keywordsPlates (structures)
keywordsDeflection
keywordsNonlinear differential equations
keywordsGraphite
keywordsEpoxy adhesives
keywordsEquilibrium (Physics)
keywordsKinetic energy
keywordsNewton's laws of motion AND Steel
treeJournal of Applied Mechanics:;1985:;volume( 052 ):;issue: 003
contenttypeFulltext


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