On the Areospace-Grade Adhesives Shear Strength Testing with ASTM D5656 Test as an Example

Open access


This article presents adhesive shearing test methods, focusing especially on the ASTM D5656 method. These methods will be briefly characterized and compared. The most important concerns about the D5656 method are described. With the use of ASTM D1002 and D5656 methods, the influence of adherend surface preparation on shearing properties of the bond is evaluated. Compared to sandblasting only, sandblasting followed by the FPL process (sulfochromate etching of aluminum) increased shear strength of joints by 35 % for ASTM D1002 tests and by 48% for D5656 tests. Comparing these two methods, shear strength obtained in D5656 tests is about two times higher than in D1002 tests. The cause for this phenomena is much larger adherend thickness in the D5656 method, which provides the coupons with increased stiffness. Shear modulus, calculated with 3 different calculation methods, showed differences in obtained results, which points to necessary actualization of D5656 standard.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] Higgins A. 2000 “Adhesive bonding of aircraft structures” Int. Journal of Adhesion & Adhesives No. 20 pp. 367-376.

  • [2] Öchsner A. Genger J. 2004 “Critical analysis of the substrate deformation correction in the thick adherend tensile-shear test” Int. Journ. Of Adhesion & Adhesives No. 24 pp. 37-41.

  • [3] ASTM D5656 “Standard test method for thick adherend metal lap-shear joints for determination of the stress-strain behavior of adhesives in shear by tension loading”.

  • [4] Seneviratne W.P. Tomblin J.S. 2011 “Adhesive characterization using NIAR-modified KGR estensometer” SAMPE Journal No. 47 pp. 37-44.

  • [5] Yang Ch. Tomblin J.S. 2001 “Investigation of adhesive behavior in aircraft applications” DOT/FAA/AR-01/57 report.

  • [6] Da Silva L.F.M. Öchsner A. 2011 “Failure strength tests” Handbook of Adhesion Technology pp. 443-471.

  • [7] Kassapoglou Ch. Adelmann J.C. 1992 “KGR-1 thick adherend specimen evaluation for the determination of adhesive mechanical properties” SAMPE Quarterly pp. 19-27.

  • [8] Da Silva L.F.M. et al. 2008 “Alternative methods to measure the adhesive shear displacement in the thick adherend shear test” Journ. Of Adhesion Science and Technology No. 22 pp. 15-29.

  • [9] ASTM D1002 2010 “Standard test method for apparent shear strength of single-lap joint adhesively bonded metal specimens by tension loading (metal-to-metal)” ASTM International West Conshohocken PA DOI: 10.1520/D1002-10.

  • [10] Wiśniowski W. 2014 „XX lat Programu Samolotów Lekkich i Bezpieczeństwa. PSLiB” („Twenty Years of Light Aircraft and Safety Program”) Transactions of the Institute of Aviation Vol. 236(2) pp. 7-25.

  • [11] Kaczorowska E. 2016 „Porównanie metod testowania wytrzymałości kleju na odrywanie dla różnych sposobów przygotowania powierzchni próbek” („Comparison of Methods for Testing the Peel Strenght for Different Methods of Preparation of Surface Samples”) Transactions of the Institute of Aviation Vol. 244(3) pp. 92-98

  • [12] Jaśkiewicz R. Stepniowska A. 2016 „Praktyczne zastosowanie metodyki FAA do przyklejania próbek kompozytowych do testów kwalifikacji materiału” (Practical Application of FAA Methodology of Composite Specimens Used to Material Tests Qualifications”) Transactions of the Institute of Aviation Vol. 244(3) pp. 74-78.

Journal information
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 8 8 6
PDF Downloads 6 6 6