ASTM D – 00 Structural Panels in Flexure – Download as PDF File .pdf), Text File .txt) or read online. ASTM D – Standard Test Methods for Structural Panels in Flexure. GPa). Wilson and Parasin (26) compared two widths of ply wood ( and mm) using the pure-moment bending test in ASTM D (3).
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These errors are not present in Method C. Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers.
This method is particularly recommended for thin specimens and small loads. The midordinate deflection method employs readily available equipment to measure curvature. If the material under test deviates from a plane, laterally adjustable supports shall be provided see Figs.
Construction of a satisfactory loading head is illustrated in Fig. A astn rod approximately the same length as the spacing between pins is fitted at each end with an angular sensing device.
Standard – Standard Test Methods for Structural Panels in Flexure ASTM D –
Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers. The width of d30433 loading block shall exceed the width of test specimens. Reading of the dial gage to the nearest 0. All methods are applicable to material that is relatively uniform in aetm and stiffness properties. It should be noted that the span is based on the nominal thickness of the material and it is not intended that the spans be changed for small variations in thickness.
If gages are read, take at least 12 and preferably 15 or more readings below the approximate proportional limit.
Moisture content determinations shall be made in accordance with Test Methods D Conditioning of test material at controlled atmospheres to control test moisture content and determination of specific gravity are recommended. The axes of these surfaces shall remain parallel and at least one of them shall be free to turn about its axis or be loaded through rollers to prevent the application of friction forces to the surface of the specimen.
A dial gage could replace the transducer for manual reading. Limitation on size may be imposed by equipment size or moment capacity or size of available material. This method uses a span to depth d304, specimen width, test fixture and test speed that make the method well suited for quality assurance.
The choice of method will be dictated by the purpose of the test, type of material, asrm equipment availability. Deflection of mid span relative to two points just inside the load points is measured with a dial gage or transducer thus giving deformation due to pure bending and unaffected by shear deformation.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM D Flexural Structural Panel Testing Machine
Deflection and modulus of elasticity obtained from this method are related to flexural stress only and do not contain a shear component. It is well suited to investigations of asgm variables that influence properties uniformly throughout the panel in controlled studies and to test small, defect-free control specimens cut from large panels containing defects tested by the large-specimen method.
ASTM D D determines the flexural properties of strips cut from astmm panels or panels up to 4 by 8 ft in size.
Frames are free to move toward or away from each other during the test to preclude application of other than pure moments to the center span of the panel. Support axes of the loading frames to remain in a parallel relationship throughout the test Note 4. It may be based on the entire cross section, may include only the moment asstm inertia of layers parallel to span, or may include all layers weighted in accordance with modulus of elasticity in the direction of bending stress.
The test is simple and flexible, and results are directly relatable to basic properties at large deformations. Control of Moisture Content 4.
ASTM D 3043 – 00 Structural Panels in Flexure
We are a non-profit group that run this website to share documents. The length shall be 2 in. In some cases closer spacing may be entirely satisfactory.
Four methods of tests are included: Take deflection readings to the nearest 0. Method C generally is preferred where size of test material permits.
ASTM D3043 Flexural Structural Panel Testing Machine
Originally published as D — This method uses a span to depth ratio, specimen width, test fixture and test speed d30043 make the method well suited for quality assurance. ASTM D covers several procedures for testing the flexural properties of structural panels. Active view current version of standard.
Size px x x x x It is preferred when equipment is available. However, Method B may be used to evaluate certain features such as core gaps and veneer joints in plywood panels where effects are readily projected to full panels. The specimen is supported on reaction bearings which permit the specimen and bearing plate to roll freely over the reactions as the specimen deflects.
These pins, threaded at one end and having a small rectangular flange, are attached to the panel either by screwing them into small holes d30443 the face of the panel until the flange is drawn d3403 against the face or by inserting the pin through a hole in astn panel and drawing the flange tight by means of a nut on the opposite side of the panel.