Analysis of Balanced Double Lap Joints with a Bi-Linear Softening Adhesive

Christian Skodborg Hansen, Henrik Stang, Jacob Wittrup Schmidt

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Abstract

The response of a bonded symmetric balanced double lap joint under tensile loading with a bilinear softening adhesive is described with a closed form solution. Since bonded joints in concrete structures undergo softening, a versatile model to describe the response for a wide range of constitutive relationships is needed. A constitutive relationship containing a bi-linear softening law contains such versatility. The solution was investigated for moderate and extreme softening parameters. The solution for extreme softening parameters, exhibited a non-physical behavior, where the size of the stress-free crack decreased for increasing size of fracture process zone. This suggests that in order to fully describe the loading and unloading response, an unloading law should be implemented in the constitutive model. Apart from adhesively bonded metallic joints, the present solution may be used in analysis of cracked concrete disks strengthened with adhesive bonded fiber reinforced polymers (FRP), or in any other structure comparable to a double lap joint with a softening interface. The present constitutive model can be changed to fit any model with the same shape of constitutive relationship, see Figure 1.
Original languageEnglish
Title of host publicationFracture Mechanics of Concrete and Concrete Structures : Assessment, Durability, Monitoring and Retrofitting of Concrete Structures
EditorsB. H. Oh
PublisherKorea Concrete Institute
Publication date2010
Pages1261-1268
ISBN (Print)978-89-5708-181-5
Publication statusPublished - 2010
Event7th International Conference on Fracture Mechanics of Concrete and Concrete Structures - Jeju, Korea, Republic of
Duration: 23 May 201027 May 2010
Conference number: 7

Conference

Conference7th International Conference on Fracture Mechanics of Concrete and Concrete Structures
Number7
CountryKorea, Republic of
CityJeju
Period23/05/201027/05/2010

Cite this

Hansen, C. S., Stang, H., & Schmidt, J. W. (2010). Analysis of Balanced Double Lap Joints with a Bi-Linear Softening Adhesive. In B. H. Oh (Ed.), Fracture Mechanics of Concrete and Concrete Structures: Assessment, Durability, Monitoring and Retrofitting of Concrete Structures (pp. 1261-1268). Korea Concrete Institute.