ABSTRACT
The dynamic response of boned joint for composite beam under pulse load was studied
theoretically and experimentally. In the theoretical part, the validity of the theoretical
model for evaluating natural frequencies, mode shape and dynamic response of boned
joint composite beams at various types of bond line configuration has been examined
by utilizing of the finite element technique. The finite element results indicated that the
deformation mechanism of the boned joint composite beam depends on mechanical
properties of the adhesive material. The mathematical finite element model is
represented by introducing unified mechanical parameters to compute efficiently the
Eigen-nature for composite bonded structures.
In the experimental part, the response of fiberglass-reinforced polyester composite
specimens with various types of bond line configuration and five lamina orientations
were measured by hammer test technique "frequency response function" (FRF).
The comparison between experimental and numerical model shows the efficiency of the
proposed mathematical model of the composite structural beam with bonded joints. The
results show that the changes of the dynamic response provide a proper indicator for
predicting the current state of adhesive bonded joint.