Impact behaviour of bonded mild steel lap joints

Beevers, A.; Ellis, Michael D.

doi:10.1016/0143-7496(84)90055-1

Cited by 49 publications

(10 citation statements)

References 6 publications

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“…Harris and Adams [14], working with a single lap joint in a pendulum impact machine, found little difference between joints tested under impact and quasi-static conditions. In contrast, Beevers and Ellis [15] observed higher strengths in impact loading and suggested this was associated with the strain rate dependence of the adherends. Kihara et al [16] designed a test to study the response of a thick adherend shear joint subjected to various impact stress waves and observed that the type of fracture was associated with the level of the incident stress.…”

Section: Introductionmentioning

confidence: 84%

Damage in adhesively bonded CFRP joints: Sinusoidal and impact-fatigue

Casas-Rodríguez

Ashcroft

Silberschmidt

2008

Composites Science and Technology

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The main aim of this paper is to investigate the behaviour of adhesively bonded CFRP joints subjected to cyclic low-velocity impacts and to compare this with fracture in specimens tested in standard fatigue (i.e. non-impacting, constant amplitude, sinusoidal fatigue). It is seen that the accumulated energy associated with damage in impact-fatigue is significantly lower than that associated with similar damage in standard fatigue and that the mechanisms of failure are very different for the two loading regimes. For both types of loading, fracture initiates in the adhesive layer and then propagates into the 0º ply of the composite adjacent to the adhesive layer. However, the fracture surfaces after impact-fatigue are generally less uniform and exhibit more signs of high rate/brittle fracture than seen in the fracture surfaces after standard fatigue testing. Various parameters are proposed to characterise damage in standard and impact-fatigue and it is shown that crack velocity, accumulated absorbed energy and normalised maximum force are all useful parameters for characterising damage evolution.2

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Section: Introductionmentioning

confidence: 84%

Damage in adhesively bonded CFRP joints: Sinusoidal and impact-fatigue

Casas-Rodríguez

Ashcroft

Silberschmidt

2008

Composites Science and Technology

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“…To investigate more thoroughly the behaviour of adhesively bonded joints under high strain rate conditions several authors have studied the behaviour of lap shear joints [2,8,9,10,11]. Interestingly, there is a lack of consensus in the literature as to the effect of strain rate on the behaviour of joint specimens.…”

Section: Introductionmentioning

confidence: 99%

Application of the design of experiments procedure to the behaviour of adhesively bonded joints with plastically deformable adherends to enable further understanding of strain rate sensitivity

Clarke¹,

Broughton²,

Hutchinson³

et al. 2013

International Journal of Adhesion and Adhesives

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The study presented in this paper was carried out to investigate further the effects of strain rate on the strength of adhesively bonded single lap shear joints. Tests were carried out on two different configurations of adhesively bonded joints that were designed to exhibit different behaviours. In one configuration both adherends were made from a relatively low strength grade of aluminium such that both would exhibit significant plastic deformation prior to adhesive failure. The other configuration used one adherend that was significantly stronger such that only elastic deformation was exhibited prior to failure of the adhesive. The joint specimens were tested at several different strain rates using a servo-hydraulic test machine and the results analysed using statistical methods. To further understand the results Finite Element models of the joints were created using a Cohesive Zone Model to predict damage development and failure in the adhesive. The Design of Experiments procedure was used to study the effects of material parameters relating to both the adherends and the adhesive in the Finite Element models. The results of the testing suggested that the strength of joints formed from two adherends that exhibited plastic deformation prior to failure did not show statistically significant sensitivity to strain rate. Interpretation of the results of the Finite Element analyses suggested that the adherend yield was the main factor influencing failure in the adhesive for joints of this type.

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“…Some researchers reported similar results for impact and quasistatic conditions, for example, for a single-lap joint tested in a pendulum impact machine in Harris and Adams (1985). In Beevers and Ellis (1984), higher strength was measured in impact loading; it was supposed that the result was due to the strain-rate sensitivity of the adherends. An analysis of the shear response of a joint with thick adherends, subjected to various stress waves generated by impact, showed that their type of fracture was associated with the level of the incident stress wave (Kihara, Isono, Yamabe, & Sugibayashi, 2003).…”

Section: Adhesives Under An Impactmentioning

confidence: 80%