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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This method uses a span to depth ratio, specimen width, test astn and test speed that make the method well suited for quality assurance. These errors are not present in Method C. A superscript epsilon e indicates an editorial change since the last revision or reapproval. The specimen may be the same as that for moisture content determination but must have volume of at least 1 in.
Space bars of the loading frames sufficiently to prevent shear failures between where: Use of linear differential transformers as transducers permits primaries and secondaries s3043 be wired to produce a single signal proportional to their sum for indication or recording.
When rounded supports are used, the radius shall be at least 1.
ASTM D 3043 – 00 Structural Panels in Flexure
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. The depth of the specimen shall be equal to the thickness of material, and the width shall be 1 in. NOTE 7—A test rate to achieve the average failure load for the sample in approximately 1 min will differ from that to achieve a lower percentile load for the same sample in approximately 1 min.
These 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 zstm, crates, or pallets; or structural components such as stress-skin panels. The alternate width is 12 in.
Measure width to the nearest 0. If gages are read, take at least 12 and preferably 15 or more readings below the approximate proportional limit. Design of end supports shall place the center of rotation near the neutral axis of the specimen of average thickness.
ASTM D3043 Flexural Structural Panel Testing Machine
Originally published as D — Suitable equipment of the transducer type is illustrated in Fig. To eliminate plate action when wider specimens are tested, the specimen asttm shall not exceed one third of the span length and precaution shall be taken to ensure uniform bearing across the entire width of the specimen at the load and reaction points.
However, it may be used to determine the effects of finger joints, veneer joints and gaps, and other features which can be placed entirely between the load points and whose effects can be projected readily to full panel width. The rate of load application shall be such that the maximum fiber strain rate is equal to 0.
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 astj permit computation of section properties. A bar spacing of 20 times panel thickness is suggested to preclude most, if not all, shear failures in the plane of the panel.
Friction forces that tend to resist motion of the axes of the loading frames during a test may also cause significant errors.
The principle of a commercially available flexure testing machine complying with these requirements is diagrammed in the figure below.
Several factors including moisture content and specific gravity can affect the calculations. The supports shall be rounded or shall be knife edges provided with rollers and plates under the specimen at these points.
The characteristically violent failures of large panels will normally dictate removel of delicate measuring instruments from the panel when sufficient data in the elastic range has been obtained. The failure load should not be reached in less than 10 s nor more than 10 min Note 8. Only Method C should be used to test material suspected of having strength or stiffness variations within a panel caused by density variations, knots, knot-holes, areas of distorted asmt, fungal attack, or wide growth variations.
Referenced Documents purchase separately The documents listed below are referenced within the subject satm but are not provided as part of the standard.
ASTM D – 00() Standard Test Methods for Structural Panels in Flexure
If individual gage readings are taken, at least 12 and preferably 15 or more load and deflection readings shall be taken below approximate proportional limit or for determining specimen stiffness. In accordance with Test Method Dthe test rate shall be such that the sample target failure adtm would be achieved in approximately 1 min Note 7. 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.
A description of the test method shall include equipment used to apply loads or moments to the panel, their points of application, deformation measuring equipment, and geometry of deformation measured. 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. Modulus of Rupture can also be determined however it is subject to a notable degree of error based on the bottom span, asrm points, and the total deflection at failure.
Frames are free to move toward or away from each other during the test astj preclude application of other than pure moments to the center span of adtm panel. Take deflection readings to the nearest 0. The test proceeds at a constant rate of loading until either sufficient deflection readings are recorded or until failure occurs, depending upon purpose. Moisture content specimens also serving as specific gravity specimens d303 be free of density variations and inner ply voids such as knotholes or edge gaps between veneers.