<p><b>1.1 </b>This International Standard specifies two methods for determining compressive properties, in directions parallel</p>
<p>to the plane of lamination, of fibre-reinforced plastic composites.</p>
<p><b>1.2 </b>The compressive properties are of interest for specifications and quality-control purposes.</p>
<p><b>1.3 </b>Two loading methods and two types of specimen are described. They are:</p>
<p> Method 1: provides shear loading of the specimen (gauge length unsupported).</p>
<p> Method 2: provides end loading, or mixed loading, of the specimen (gauge length unsupported).</p>
<p>NOTE For tabbed specimens end-loaded using method 2, some load is transferred into the specimen gauge length by</p>
<p>shear through the tabs.</p>
<p> Type A specimen: rectangular cross-section, fixed thickness, end-tabbed.</p>
<p> Type B specimen: rectangular cross-section, range of thicknesses, untabbed or end-tabbed (two sizes</p>
<p>available).</p>
<p>Any combination of test method and specimen may be used, provided that the requirements of subclause 9.8 are</p>
<p>satisfied and that the specimen is representative of the material under test. These alternative test conditions will not</p>
<p>necessarily give the same result.</p>
<p>The type A specimen is the preferred specimen for unidirectionally reinforced materials tested in the fibre direction.</p>
<p>For other materials, the type A or B specimen may be used. The type B2 specimen is preferred for mat, fabric and</p>
<p>other multidirectionally reinforced materials.</p>
<p><b>1.4 </b>The methods are suitable for fibre-reinforced thermoplastic and thermosetting plastic composites.</p>
<p>Unreinforced and particle-filled plastics, as well as those reinforced with short fibres (less than 1 mm in length), are</p>
<p>covered by ISO 604 (see bibliography).</p>
<p><b>1.5 </b>The methods are performed using specimens which may be machined from a test panel made in accordance</p>
<p>with ISO 1268 or equivalent methods, or from finished or semi-finished products.</p>
<p><b>1.6 </b>The methods specify required dimensions for the specimen. Tests which are carried out on specimens of other</p>
<p>dimensions, or on specimens which are prepared under different conditions, may produce results which are not</p>
<p>comparable. Other factors, such as the speed of testing, the support fixture used and the condition of the</p>
<p>specimens, can influence the results. Consequently, when comparative data are required, these factors must be</p>
<p>carefully controlled and recorded.</p>
<p><b>1.7 </b>Fibre-reinforced plastics are usually anisotropic. It is therefore often useful to cut test specimens in at least the</p>
<p>two main directions of anisotropy, or in directions previously specified (for example a lengthwise direction</p>
<p>associated with the production process).</p>
Registration number (WIID)
23638
Scope
<p><b>1.1 </b>This International Standard specifies two methods for determining compressive properties, in directions parallel</p>
<p>to the plane of lamination, of fibre-reinforced plastic composites.</p>
<p><b>1.2 </b>The compressive properties are of interest for specifications and quality-control purposes.</p>
<p><b>1.3 </b>Two loading methods and two types of specimen are described. They are:</p>
<p> Method 1: provides shear loading of the specimen (gauge length unsupported).</p>
<p> Method 2: provides end loading, or mixed loading, of the specimen (gauge length unsupported).</p>
<p>NOTE For tabbed specimens end-loaded using method 2, some load is transferred into the specimen gauge length by</p>
<p>shear through the tabs.</p>
<p> Type A specimen: rectangular cross-section, fixed thickness, end-tabbed.</p>
<p> Type B specimen: rectangular cross-section, range of thicknesses, untabbed or end-tabbed (two sizes</p>
<p>available).</p>
<p>Any combination of test method and specimen may be used, provided that the requirements of subclause 9.8 are</p>
<p>satisfied and that the specimen is representative of the material under test. These alternative test conditions will not</p>
<p>necessarily give the same result.</p>
<p>The type A specimen is the preferred specimen for unidirectionally reinforced materials tested in the fibre direction.</p>
<p>For other materials, the type A or B specimen may be used. The type B2 specimen is preferred for mat, fabric and</p>
<p>other multidirectionally reinforced materials.</p>
<p><b>1.4 </b>The methods are suitable for fibre-reinforced thermoplastic and thermosetting plastic composites.</p>
<p>Unreinforced and particle-filled plastics, as well as those reinforced with short fibres (less than 1 mm in length), are</p>
<p>covered by ISO 604 (see bibliography).</p>
<p><b>1.5 </b>The methods are performed using specimens which may be machined from a test panel made in accordance</p>
<p>with ISO 1268 or equivalent methods, or from finished or semi-finished products.</p>
<p><b>1.6 </b>The methods specify required dimensions for the specimen. Tests which are carried out on specimens of other</p>
<p>dimensions, or on specimens which are prepared under different conditions, may produce results which are not</p>
<p>comparable. Other factors, such as the speed of testing, the support fixture used and the condition of the</p>
<p>specimens, can influence the results. Consequently, when comparative data are required, these factors must be</p>
<p>carefully controlled and recorded.</p>
<p><b>1.7 </b>Fibre-reinforced plastics are usually anisotropic. It is therefore often useful to cut test specimens in at least the</p>
<p>two main directions of anisotropy, or in directions previously specified (for example a lengthwise direction</p>
<p>associated with the production process).</p>
