A coupled stress and energy model for mixed-mode cracking of adhesive joints
This work is concerned with the analysis of failure of adhesive joints.Typically adhesive joints fail due to cracking of the adhesive with cracks originating from the reentrant corner of the adherend and the adhesive.A failure model based on a coupled stress and energy criterion settled in the framework of Finite Fracture Mechanics (FFM) is proposed in this work.The main idea of coupled criteria in FFM is that cracks of finite size are predicted when a stress criterion is fulfilled on all points of the considered crack and simultaneously an energy criterion is fulfilled.A failure model for adhesively bonded single lap joints is worked out that makes use of an extended weak interface model.Its closed-form analytical nature allows for an efficient formulation of the non-linear failure criterion.The effects of the involved geometric parameters are examined in detail.A comparison of the failure load predictions to experimental results is given and shows a good agreement.It is shown that the effect of the adhesive layer thickness is incorporated correctly.The failure model and its implications on the understanding of failure of adhesive joints are discussed in detail.
Brittle fracture Finite Fracture Mechanics adhesive joints
Philipp Wei(β)graeber Wilfried Becker
FG Strukturmechanik,TU Darmstadt,Germany
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）