Ductile adhesively-bonded timber joints - Part 2: Strain rate effect

作者：Angelidi Myrsini; Keller Thomas^*

来源：Construction and Building Materials, 2018, 179: 704-713.

DOI：10.1016/j.conbuildmat.2018.05.213

• Acrylics
• Adhesive
• Ductility
• Epoxy
• Joint
• Spruce
• Timber
• Finite element

The mechanical behavior of adhesively-bonded timber joints, composed of a ductile acrylic or a brittle epoxy adhesive, was numerically modeled. The models took the strain rate sensitivity of the ductile adhesive into account. They were validated by experimental results presented in Part 1 of this paper. The effect of a varying joint displacement rate on the responses of the ductile joints was subsequently numerically studied. At the same joint displacement rate, the true strain rates in the acrylic adhesive layer varied significantly throughout the loading process and along the adhesive layer. Increasing the joint displacement rate shifted the load-displacement curve upwards, i.e. the yield load and displacement increased, the ultimate load and displacement however decreased, while the joint stiffness was not affected. A logarithmic relationship between these loads and displacements and the displacement rate was observed. The energy- and displacement-based ductility indexes of the acrylic joints decreased with increasing displacement rate, changing the joint behavior from ductile to brittle at higher rates.

• 出版日期2018-8-10