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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Ast, properties are of primary importance in most structural uses of panels whether in construction for floors, wall sheathing, roof decking, concrete form, or various space plane structures; packaging and materials handling for containers, crates, or pallets; or structural components such as stress-skin panels.
Locate the pivot point that equalizes the two loads near the original neutral axis of v3043 specimen.
ASTM D – 87()e1 Standard Methods of Testing Structural Panels in Flexure
The d30043 of the loading block shall exceed the width of test specimens. Active view current version of standard. If the material under test deviates from a plane, laterally adjustable supports shall be provided see Figs. All three points shall lie on the longitudinal axis of the specimen.
Except for effects of nonuniformity of properties within a panel, specimen dimensions do not tend to influence test results. Deflection and modulus of elasticity obtained from d3403 method are related to flexural stress only and do not contain a shear component.
The rate of load application shall be such that the maximum fiber strain rate is equal to 0. Construction of a suitable end support using small roller bearings in conjunction with a plate which clips to the end of the specimen is illustrated in Fig.
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. Support axes of the loading frames to remain in a parallel relationship throughout the test Note 4.
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Until further innovations are made in pure bending test awtm, use of cable and pulley equipment of this type, either purchased or constructed at the laboratory, offers the only practical means of implementing this method. An approach that reduces the errors, possibly to acceptable limits for many purposes, is to develop a correction to be applied to nominal moment which varies with mid-span deflection.
Variables Influencing Flexure 9. Force range of 5 kN to kN 1, lbf tolbf Adjustable test space The most popular choice for static tension and compression tests These dual column testers are available in both tabletop and floor standing models. Four methods of tests are included:. The specimen is supported on reaction bearings which permit the specimen and bearing plate to roll freely over the reactions as the specimen deflects.
By means of our testing expertise and modular product design, we will help find the solution that is right for you. Choose increments of load so that not less than 12 and preferably 15 or more readings of load and 1 3 D FIG.
Conditioning of test material at controlled atmospheres to control test moisture content sstm determination of specific gravity are recommended. Significant errors in modulus of rupture can occur when nominal moment is used see Appendix X1.
Moisture content determinations shall be made in accordance with Test Methods D Take deflection readings to the nearest 0.
Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers. Adtm panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers.
Control of Moisture Content 4. Comparisons of results of plywood, veneer composites, and laminates with solid wood or other plywood constructions will be astn assisted if the thickness of the individual plies is measured to permit computation of section properties.
ASTM D 3043 – 00 Structural Panels in Flexure
We asttm confident that we have what you are looking for. When the principal direction ast the face plies, laminations, strands, or wafers is parallel to the span, the length 2 Annual Book of ASTM Standards, Vol When nonuniform material containing density variation, knots, knot-holes, sloping grain or other sources of large variability astk tested for general construction and industrial use, a minimum specimen width of 24 in.
Significant errors in modulus of rupture can occur when nominal moment is used see Appendix X1. Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation. Deflection and modulus of elasticity obtained from this method are related to flexural stress only and do not contain a shear component.
ASTM D D determines the flexural properties of strips cut from structural panels or panels up to 4 by 8 ft in size. It is well suited to investigations of many 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.
A 3 or 4 point bend testing jig may be used to perform the respective test. Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be considerably larger than nominal.
All methods are applicable to material that is relatively uniform in strength and stiffness properties. Method C generally is preferred where size of test material permits.
The failure load should not c3043 reached in less than 10 s nor more than 10 min Note 8. The errors incurred by using nominal moment instead of true moment for the computation of modulus of rupture equations in this standard use nominal moment depend upon the geometry of the specimen and loading at failure. 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 f3043 at d343. Moments applied to fail specimens tested by Method A, B or D zstm which large deflections occur can be considerably larger than nominal.
State clearly the method employed in the atsm. 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. It is the responsibility of the user of this standard astk establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
ASTM D – 00() Standard Test Methods for Structural Panels in Flexure
asfm NOTE 3—Establishment of a span-depth ratio is required to allow an accurate comparison of test values for materials of different thicknesses. A reference rod approximately the same length as the spacing between pins is fitted at each end with an angular sensing device.
This method is particularly recommended for thin specimens and small loads. Last previous edition D —