The delamination of composite laminates can be effectively modelled by considering a delaminated laminate as an assemblage of sublaminates connected by an elastic interlaminar interface. In this context, the question arises on the values to be assigned to the elastic interface constants. In the present study, we show how the elastic interface constants can be estimated through an experimental compliance calibration strategy. The method is based on the analytical solution for the MMB test, derived in a previous study. Here, a nonlinear least squares fitting procedure is applied to obtain the values of the elastic interface constants from the experimental results of DCB and ENF tests. Preliminary experimental tests have been conducted to check the effectiveness of the proposed strategy.
An experimental compliance calibration strategy for estimating the elastic interface constants of delamination test specimens
BENNATI, STEFANO;VALVO, PAOLO SEBASTIANO
2013-01-01
Abstract
The delamination of composite laminates can be effectively modelled by considering a delaminated laminate as an assemblage of sublaminates connected by an elastic interlaminar interface. In this context, the question arises on the values to be assigned to the elastic interface constants. In the present study, we show how the elastic interface constants can be estimated through an experimental compliance calibration strategy. The method is based on the analytical solution for the MMB test, derived in a previous study. Here, a nonlinear least squares fitting procedure is applied to obtain the values of the elastic interface constants from the experimental results of DCB and ENF tests. Preliminary experimental tests have been conducted to check the effectiveness of the proposed strategy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
