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Significance and Use
Single-lap specimens are economical, practical, and easy to make. They are the most widely used specimens for development, evaluation, and comparative studies involving adhesives and bonded products, including manufacturing quality control.
Special specimens and test methods have been developed that yield accurate estimates of the true shear strength of adhesives. These methods eliminate or minimize many of the deficiencies of the thin-adherend single-lap specimens, but are more difficult to make and test. (See Test Methods D 3983
The misuse of strength values obtained from such Test Methods or Practices as D 906
1.1 This guide is directed toward the safe and appropriate use of strength values obtained from test methods using single-lap adhesive joint specimens.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 The discussion focuses on shear strength as measured with small thin-adherend, single-lap specimens. Many factors, however, apply to shear modulus, tensile strength, and tensile modulus measured by small laboratory specimens in general. This discussion is limited to single-lap specimens and shear strength only for simplification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D896 Practice for Resistance of Adhesive Bonds to Chemical Reagents
D906 Test Method for Strength Properties of Adhesives in Plywood Type Construction in Shear by Tension Loading
D907 Terminology of Adhesives
D1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Tension Loading (Metal-to-Metal)
D1144 Practice for Determining Strength Development of Adhesive Bonds
D1151 Practice for Effect of Moisture and Temperature on Adhesive Bonds
D1183 Practices for Resistance of Adhesives to Cyclic Laboratory Aging Conditions
D1780 Practice for Conducting Creep Tests of Metal-to-Metal Adhesives
D2294 Test Method for Creep Properties of Adhesives in Shear by Tension Loading (Metal-to-Metal)
D2295 Test Method for Strength Properties of Adhesives in Shear by Tension Loading at Elevated Temperatures (Metal-to-Metal)
D2339 Test Method for Strength Properties of Adhesives in Two-Ply Wood Construction in Shear by Tension Loading
D2919 Test Method for Determining Durability of Adhesive Joints Stressed in Shear by Tension Loading
D3163 Test Method for Determining Strength of Adhesively Bonded Rigid Plastic Lap-Shear Joints in Shear by Tension Loading
D3164 Test Method for Strength Properties of Adhesively Bonded Plastic Lap-Shear Sandwich Joints in Shear by Tension Loading
D3165 Test Method for Strength Properties of Adhesives in Shear by Tension Loading of Single-Lap-Joint Laminated Assemblies
D3166 Test Method for Fatigue Properties of Adhesives in Shear by Tension Loading (Metal/Metal)
D3434 Test Method for Multiple-Cycle Accelerated Aging Test (Automatic Boil Test) for Exterior Wet Use Wood Adhesives
D3528 Test Method for Strength Properties of Double Lap Shear Adhesive Joints by Tension Loading
D3632 Test Method for Accelerated Aging of Adhesive Joints by the Oxygen-Pressure Method
D3983 Test Method for Measuring Strength and Shear Modulus of Nonrigid Adhesives by the Thick-Adherend Tensile-Lap Specimen
D4027 Test Method for Measuring Shear Properties of Structural Adhesives by the Modified-Rail Test
D4562 Test Method for Shear Strength of Adhesives Using Pin-and-Collar Specimen
D5868 Test Method for Lap Shear Adhesion for Fiber Reinforced Plastic (FRP) Bonding
E6 Terminology Relating to Methods of Mechanical Testing
E229 Test Method for Shear Strength and Shear Modulus of Structural Adhesives
ICS Number Code 83.180 (Adhesives)
UNSPSC Code 31201601(Chemical adhesives)