Instrumented End Notched Flexure - Crack propagation and process zone monitoring. Part I: Modelling and analysis

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:50

Article

Jumel, J.^1,2,3  Budzik, M. K.^1,2,3,4  Ben Salem, N.^1,2,3,4  Shanahan, M. E. R.^1,2,3 

[1] Univ Bordeaux, I2M, UMR 5295, F-33400 Talence, France

[2] CNRS, I2M, UMR 5295, F-33400 Talence, France

[3] Arts & Metiers ParisTech, I2M, UMR 5295, F-33400 Talence, France

[4] French Space Agcy CNES DLA, F-75612 Paris, France

关键词: Bonded joints;    End Notched Flexure;    Mode II;    Strain gauges;   

DOI  :  10.1016/j.ijsolstr.2012.08.028

来源: Elsevier

【 摘 要 】

Analysis of the three-point bending, End Notched Flexure (ENF), test is presented for exploitation with a new experimental methodology using the backface strain monitoring technique. The model consists of two Timoshenko beams joined with a two parameter elastic foundation, to evaluate stress and strain fields in both adherends and the adhesive layer, together with the specimen compliance and energy release rate. This model is compared to a simplified case, from which a comprehensive experimental method is proposed for precise monitoring of crack propagation and measurement of interface shear compliance during the ENF experiment. In addition, simple formulae are proposed for evaluating mode II energy release rate, and possible experimental artefacts due to asymmetric loading conditions are evidenced. (C) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

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