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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Bearing points shall be rounded where they contact the specimen.
Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be considerably larger than nominal. Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation. The modulus of elasticity is also referred to as the flexural modulus.
ASTM D3043 Flexural Structural Panel Testing Machine
This standard does not purport to address all of the safety concerns, if any, associated with its use. If gages are read, take at least 12 and preferably 15 or more readings below the approximate proportional limit. In c3043 cases closer spacing may be entirely satisfactory. Link to Active This link will always route to the current Active version of the standard.
An electronic transducer could be substituted for the dial gage for direct recording if system accuracy is adequate. NOTE 2—In cutting specimens to meet atm length requirement, it is not x3043 that the length be changed for small variations in thickness.
Space bars of the loading frames sufficiently to prevent shear failures between where: 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.
ASTM D – 00() Standard Test Methods for Structural Panels in Flexure
This method is particularly recommended for thin specimens and small loads. An approximate correction can be made. Xstm need your help to maintenance this website. All methods are applicable to material that is relative uniform in strength and stiffness properties.
Standard Test Methods for Structural Panels in Flexure
Specimens with veneer shall be free of visible knots or voids. Significant errors in modulus of rupture can occur when nominal moment is used see Appendix X1. Several factors including astk content and specific gravity can affect the calculations. Carefully controlled investigations may require specification or construction of more precise equipment.
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. It aztm equally well suited for testing uniform or clear material whenever specimen size is adequate. Locate the pivot point that equalizes the two loads near the original neutral axis of the specimen.
Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers. The supports shall be such that no appreciable crushing of the specimen will occur at these points during the test.
Suitable equipment of the transducer type is illustrated in Fig. Where a asfm and pulley system is employed, the use of cables of the smallest possible size consistent with loads, and relatively large pulleys will help minimize friction forces. For a discussion of these errors, their effects, and methods for reducing them, refer to Appendix X1. Based on Eq 12, the loading rate is: The input shaft of each rotation gage is fitted with a flange and small V-blocks which rest on the pins projecting from the panel at each gage point, thus transmitting the angular rotation of the panel to the gage and supporting the rotation gage-reference rod assembly.
Specimen size and span above certain minimums are quite flexible. Material having high rolling shear strength or having all its plies, laminations, strands, or wafers parallel to span may use closer spacing between loads and supports. Moisture content samples from large specimens of Method C shall have minimum area of 8 in. Radius of curvature of bearing plate or block shall not be so large as to cause bridging as the aatm bends.
ASTM D – 87()e1 Standard Methods of Testing Structural Panels in Flexure
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. Give our test engineers a call today for help configuring the best test machine and accessories according to your standard. The depth of the specimen shall be equal to the thickness of material, and the width shall be 1 in.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Resulting deflection at mid span is measured. Thank you for interesting in our services.