ASTM D1184 is a standard test method for determining the flexural strength of adhesive-bonded laminated assemblies when subjected to flexural stresses with standard form specimens and under defined pretreatment, temperature, relative humidity, and testing methodology conditions. Rather than reducing shear stress to a minimum, the test specimen and testing technique used in the ASTM D1184 (Standard Test Method for Flexural Strength of Adhesive Bonded Laminated Assemblies) test method were designed to create a considerable portion of shear forces between the laminae of the test piece when the load is applied. This test method is suitable for both wood and metal-bonded specimens, and it also allows you to compare the flexural properties of different assemblies. The ASTM D1184 standard also aids in the reduction of data of metal and wood specimens to a comparable basis through the use of standard formulas.
ASTM D1184 Flexural Strength of Adhesive Bonded Laminated Assemblies
What is ASTM D1184?
ASTM D1184 Sample Preparation Guide
The ASTM D1184 test method requires two categories of specimens: (a) wood specimens and (b) metal specimens.
These specimens are rectangular pieces with a length of 38 mm and a width of 19.1 mm.
What is the Testing Procedure of ASTM D1184?
The specimen tested by ASTM D1184 is a basic beam made up of eight bonded plies loaded at the mid-span. The specimen is examined under standard temperature and humidity conditions. Then, using conventional formulas, the flexural characteristics of metal and wood specimens are compared.
Analysis Results and Interpretation
The ASTM D1184 test method is a standard test method for determining the flexural strength of adhesive-bonded laminated assemblies when subjected to flexural stresses with standard form specimens and under defined pretreatment, temperature, relative humidity, and testing methodology conditions.
The following formulae are used in the ASTM D1184 test method:
- For metal specimens, the data is reduced to a comparable basis by means of the maximum shear stress formula, as follows:
Ss = 3P/4bd
where,
Ss = maximum shear stress
P = breaking load
B = width of the beam
D = depth of the beam
- For wood specimens, the data is reduced to a comparable basis by means of the flexural strength formula, as follows:
S = 3PL/2bd2
where,
S = flexural strength
P = breaking load
L = distance between supports
B = width of the beam
D = depth of the beam
Updated on July 24, 2026
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