Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30375
Development of a New Method for T-joint Specimens Testing under Shear Loading

Authors: R. Doubrava, R. Růžek


Nonstandard tests are necessary for analyses and verification of new developed structural and technological solutions with application of composite materials. One of the most critical primary structural parts of a typical aerospace structure is T-joint. This structural element is loaded mainly in shear, bending, peel and tension. The paper is focused on the shear loading simulations. The aim of the work is to obtain a representative uniform distribution of shear loads along T-joint during the mechanical testing. A new design of T-joint test procedure, numerical simulation and optimization of representative boundary conditions are presented. The different conditions and inaccuracies both in simulations and experiments are discussed. The influence of different parameters on stress and strain distributions is demonstrated on T-joint made of CFRP (carbon fibre reinforced plastic). A special test rig designed by VZLU (Aerospace Research and Test Establishment) for T-shear test procedure is presented.

Keywords: Methodology, Composite, Mechanical testing, shear, t-joint, Finite Element analysis

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2204


[1] C. E. Bakis et al, Fiber-Reinforced Polymer Composites for Construction — State-of-the-Art Review. J. Compos. Constr., 6(2), 2002, 73–87.
[2] F. Weyrauch, L. Llopart, F. Strachauer, An Innovative Approach on Modular Joints for Carbon Fibre Reinforced Structures. Proceedings of ICCM-17 17th International Conference on Composite Materials, 27 – 31 Jul 2009, Edinburgh, UK, ISSN, 1465-8011.
[3] K.I. Tserpes, G.N. Labeas, Mesomechanical analysis of non-crimp fabric composite structural parts. Composite Structures. 87(4), 2009, 358–369.
[4] F. Stig, S. Hallström, Assessment of the mechanical properties of a new 3D woven fibre composite material. Composites Science and Technology, 69(11–12), 2009, 1686–1692.
[5] G. Wachinger, C. Thum, L. Llopart, A. Maier, H. Wehlan, T. Stöven, New Trends in CFRP Treatment and Surface Monitoring for Automated Structural Adhesive Bonding. Proceedings of ICCM-17 17th International Conference on Composite Materials, 27 – 31 Jul 2009, Edinburgh, UK, ISSN, 1465-8011.
[6] K.I. Tserpes, , Sp. Pantelakis, V. Kappatos, The effect of imperfect bonding on the pull-out behavior of non-crimp fabric Pi-shaped joints. Computational Materials Science. 50(4), 2011, 1372–1380.
[7] D.R. Cartié, G. Dell’Anno, E. Poulin, I. K. Partridge, 3D reinforcement of stiffener-to-skin T-joints by Z-pinning and tufting. Eng. Fracture Mechanics, 73(16), 2006, 2532–2540.
[8] CERFAC - Cost Effective Reinforcement of Fastener Areas in Composites. FP7 grant agreement n° 266026,
[9] Femap - Finite Element Modeling And Postprocesing, Version 11.1.2. Siemens Product Lifecycle Management Software Inc. 2014.
[10] Nastran - NASA STRucture ANalysis. Finite element analysis code. Version NX/Nastran 8.5. Siemens Product Lifecycle Management Software Inc. 2013.
[11] M. Asif, Y. Aymat, M. Kashif, Design and Analysis of Grid Stiffened Composite structure, Lambert Academic Publishing AG&Co.Kg, Saarbrucken, 2010, ISBN: 978-3-8383-51-1.