FEM stress analysis and strength of adhesive butt joints of similar hollow cylinders under static and impact tensile loadings

Abstract

The stress wave propagations in butt adhesive joints of similar hollow cylinders subjected to static and impact tensile loadings are analyzed in elastic and elasto-plastic deformation ranges using the nite-element method (FEM). The impact loading is applied to the joint by dropping a weight. The upper end of the upper adherend is xed and the lower adherend of which the lower end is connected to a guide bar is subjected to the impact loading. The FEM code employed is DYNA3D. The effects of the adhesive thickness and Young's modulus of the adhesive on the stress wave propagation at the interfaces are examined. In addition, the characteristics of the joints subjected to impact loadings are compared with those of the joints under static loadings and the joint strengths are estimated by using the interface stress distributions. It is found that the maximum value of the maximum principal stress, ¾ 1 occurs at the outside edge of the interface of the lower adherend to which the impact loading is applied. The maximum value of the maximum principal stress, ¾ 1 increases as Young's modulus of the adhesive increases when the joints are subjected to impact loadings. It is found that the characteristics of the joints subjected to impact loadings are opposite to those subjected to static loadings. In addition, experiments were carried out to measure the strain response of the butt adhesive joints subjected to impact and static tensile loadings using strain gauges and the joint strengths were also measured. Fairy good agreements are observed between the numerical and the measured results.

Junctions in shell structures: A review

“…Explicit asymptotic formulae were obtained for the first six eigenfrequencies. Sawa et al [185] performed the FEM stress analysis for strength of adhesive butt joint of similar hollow cylinders under static and impact tensile loadings. It was found, in particular, that characteristics of the joints subjected to impact loading were opposite to those subjected to static loading.…”

Experimental investigation on transverse low-speed impact behavior of adhesively bonded similar and dissimilar clamped plates

“…Sawa et al [11] also studied the effects of adhesive modulus and thickness on the stress wave propagation in an adhesive butt joint of similar hollow cylinders considering elastic and elasto-plastic material behaviors and showed that the adhesive joint exhibited different responses for the static and impact loadings. Sawa et al [12] investigated the effects of adhered scarf angle and modulus, adhesive thickness on the stress wave propagations along the adhesive-adhered interfaces of an adhesively bonded scarf joint under an impact load.…”

Experimental and FEM studies on mechanical properties of single-lap adhesive joint with dissimilar adherends subjected to impact tensile loadings

“…Yokoyama et al [11,12] introduced the split Hopkinson bar techniques which are used widely in the impact experiments of the adhesive joints. Sawa et al studied the properties of the single-lap adhesive joints with similar [13] and dissimilar [14] adherends, plates butt adhesive joints [15], cylindrical butt adhesive joints with similar [16] and dissimilar hollow cylinders [17] under impact loadings. Maheri and Adams [18] researched the dynamic shear modulus in thick adherend shear test specimens under a high frequency.…”