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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All methods are applicable to material that is relative uniform in strength and stiffness properties. 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 d304 to the surface of the 3d043. Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers.
This equipment is the subject of U.
D load points plus 48 times specimen thickness or 24 times specimen thickness for the principal direction atsm or perpendicular respectively. The method is frequently used for quality assurance testing of oriented strand board. Each gage housing is provided with small ball bearings which permit free movement of the angular sensing gage along the rod while holding it in fixed angular relationship to it.
Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be considerably larger than nominal. The alternate width is 12 in.
ASTM D – 00() Standard Test Methods for Structural Panels in Flexure
Similar requirements apply to the load axis. It is equally well suited for testing uniform or clear material whenever astn size is adequate. An approximate correction can be made. The width of the loading block shall exceed the width of test specimens. Resulting deflection at mid span is measured. A 3 or 4 point bend testing jig may be used to perform the respective test.
Have a question about conducting the test for this standard? Active view current version of standard. This method uses a span to depth ratio, specimen width, test fixture and test asfm that make the method well suited for quality assurance.
Standard Test Methods for Structural Panels in Flexure
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. If inspection of the edges qstm panels containing veneer reveals the presence of a knot in any of the inner plies, s3043 a second specimen. The rate of load application shall be such that the maximum fiber strain rate is equal to 0.
We are confident that we have what you are looking for. The test proceeds at a constant rate of head motion until either sufficient deflection data in the elastic range have been gathered or until specimen failure occurs.
A reference rod approximately the same length as the spacing between pins is fitted at each end with an angular sensing device. Modulus of Rupture can also be determined however it is subject to a notable degree of error based on the bottom span, loading points, and the total deflection at failure. Also like Method A, this method uses small specimens in a center-point simple span test configuration.
When the principal direction of the face plies, laminations, strands, or wafers is parallel to the span, the length 2 Annual Book of ASTM Standards, Vol All methods are applicable to material that is relative uniform in strength and stiffness properties.
Size px x x x x Variables Influencing Flexure 9. The supports shall be rounded or shall be knife edges provided with rollers and plates under the specimen at these points. If the material under test deviates from a plane, laterally adjustable supports shall be provided see Figs. Method C generally is preferred where size of test material permits.
Standard – Standard Test Methods for Structural Panels in Flexure ASTM D –
When deflection is measured relative to two points on the neutral axis of the panel: Four methods of tests are included: The depth of the specimen shall be the thickness of the panel.
Please astn us to share our service with your friends. Comparisons of results of plywood, veneer composites, and laminates with solid wood or other plywood constructions will be greatly assisted if the thickness of the individual plies is measured to permit computation of section properties. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.
There are many sizes available and they are usually specified by the customer. Thank you for interesting in d343 services. Astk deflection, and modulus of elasticity astmm from it, include a relatively constant component attributable to shear deformation.
Take deflection readings to the nearest 0. D — 00e1 Standard Test Methods for Structural Panels in Flexure1 This standard is issued under the fixed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
Significant errors in modulus of rupture can occur when nominal moment is used see. Deflection and modulus of elasticity obtained from this method are related to flexural stress only and do not contain a shear component. The midordinate deflection method employs readily available equipment to measure curvature.
This test method covers the flexural properties of strength and stiffness. NOTE 3—Establishment of a span-depth ratio is required to allow an accurate comparison r3043 test values for materials of different thicknesses.
Where a cable and pulley system is employed, the use of cables of the smallest possible size ast, with loads, and relatively large pulleys will help minimize friction forces. The method is frequently used for quality assurance testing of oriented strand board. In some cases closer spacing may be entirely satisfactory. 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.
Take deflections by the methods indicated in Fig. Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation.