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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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. 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. Method C generally is preferred where size of test material permits. This method uses a span to depth ratio, specimen width, test fixture and test speed that make the method well suited for quality assurance.
Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation. Moisture content samples from large specimens of Method C shall have minimum area of 8 in.
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 grain, fungal attack, or wide growth variations.
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by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.
ASTM D – 87()e1 Standard Methods of Testing Structural Panels in Flexure
Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be considerably larger than nominal. Similar requirements apply to the load axis.
The test is simple and flexible, and results are directly relatable to basic properties at large deformations. A superscript epsilon e indicates an editorial change since the last revision or reapproval. These materials can include plywood, particle board, strand board, veneer composites, and other wood type materials.
Calculate the radius of curvature by the method discussed in 7. 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. An approximate correction can be made. Construction of a satisfactory loading head is illustrated in Fig.
Method C generally is preferred where size of test material permits. In accordance with Test Method Dthe test rate shall be such that the sample target failure load would be achieved in approximately 1 min Note 7.
Carefully controlled investigations may require specification or construction of more precise equipment. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications. Method C generally is preferred where size of test material permits.
If gages are read, take at least 12 and preferably 15 or more readings below the approximate proportional limit. All methods are applicable to material that is relative uniform in strength and stiffness properties. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers.
Standard Test Methods for Structural Panels in Flexure
State clearly the method employed in the report. We need your help to maintenance this website.
Four methods of tests are included:. Friction forces that tend to resist motion of the axes of the loading frames during a test may also cause significant errors. This test method covers the flexural properties of strength and stiffness. Please fill this form, we will try to respond as soon as possible.
Other comments as well as those of 5.
ASTM D 3043 – 00 Structural Panels in Flexure
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. The angular rotation method uses special angular rotation measuring instruments to determine rotational deformation of the portion of the panel subjected to pure bending.
An approximate correction can be made. Originally published as D — Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be considerably larger than nominal. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Measure width at mid-span to the nearest 0. 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.
Significant errors in modulus of rupture can occur when nominal moment is used see Appendix X1. The depth of the specimen shall be equal to the thickness of material, and the width shall be 1 in. It is preferred when equipment is available.
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.