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Damage estimation in nonlinear laminates subjected to a transverse concentrated load
A damage growth problem of nonlinear laminated plates subjected to a transverse concentrated load is analytically solved to estimate the significance of damage due to low velocity foreign object impact. The damaged portion is modelled as equally spaced multiply delaminated plates. A superposition technique is used to derive an approximated relation between the load and deflection. The first problem is a basic one, that is, a slightly nonlinear response of an intact global plate without damage pushed by a concentrated load at its center. The second problem is that of a nonlinear response of piled circular plates with the average radius and the thickness of the delaminated ligaments loaded by an equivalent force to the reduced bending stiffness due to the introduction of the damage. The periphery of the delaminated plate is assumed fixed, considering that the bending stiffness of the intact portion is much higher than the delaminated portion. Some nonlinear effect of the first problem is considered by introducing initial inplane stress caused by an equivalent relative displacement of the damaged portion of the first problem. The results are compared with finite element solutions and showed excellent agreement.
Damage estimation in nonlinear laminates subjected to a transverse concentrated load
A damage growth problem of nonlinear laminated plates subjected to a transverse concentrated load is analytically solved to estimate the significance of damage due to low velocity foreign object impact. The damaged portion is modelled as equally spaced multiply delaminated plates. A superposition technique is used to derive an approximated relation between the load and deflection. The first problem is a basic one, that is, a slightly nonlinear response of an intact global plate without damage pushed by a concentrated load at its center. The second problem is that of a nonlinear response of piled circular plates with the average radius and the thickness of the delaminated ligaments loaded by an equivalent force to the reduced bending stiffness due to the introduction of the damage. The periphery of the delaminated plate is assumed fixed, considering that the bending stiffness of the intact portion is much higher than the delaminated portion. Some nonlinear effect of the first problem is considered by introducing initial inplane stress caused by an equivalent relative displacement of the damaged portion of the first problem. The results are compared with finite element solutions and showed excellent agreement.
Damage estimation in nonlinear laminates subjected to a transverse concentrated load
Suemasu, Hiroshi (Autor:in) / Wisnom, Michael (Autor:in) / Sun, Ric (Autor:in) / Hallett, Stephen (Autor:in)
24.07.2015
Suemasu , H , Wisnom , M , Sun , R & Hallett , S 2015 , ' Damage estimation in nonlinear laminates subjected to a transverse concentrated load ' , Paper presented at ICCM20 , Copenhagen , Denmark , 19/07/15 - 24/07/15 .
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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