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).
|Country:||Central African Republic|
|Published (Last):||4 April 2008|
|PDF File Size:||3.18 Mb|
|ePub File Size:||17.94 Mb|
|Price:||Free* [*Free Regsitration Required]|
The use of a large ball bearing to provide lateral compensation for warp is also illustrated.
ASTM D3043 Flexural Structural Panel Testing Machine
Specimen size and span above certain minimums are quite flexible. Conditioning of test material at controlled atmospheres to control test moisture content and determination of specific gravity are recommended.
Asmt of linear differential transformers as transducers permits primaries and secondaries to be wired to produce a single signal proportional to their sum for indication or recording. Measure width to the nearest 0. NOTE 3—Establishment of a span-depth ratio is required to allow an accurate comparison of test values for materials of different thicknesses. 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. This equipment is the subject of U.
ASTM D – Structural Panel Flex Test
Measure to the nearest 0. Friction forces that tend to resist motion of the axes of the loading frames during a test may also cause significant errors. The axes of these surfaces shall asym 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 forces to the surface of the specimen.
Measurements shall be to the nearest 0. Current edition approved Apr.
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.
It may be based on the entire cross section, only the layers parallel to the span or may include all layers weighted in proportion to the modulus of elasticity in the direction parallel to span. By means of our testing expertise and modular product design, we will help find the solution that is right for you. Resulting deflection at mid span is measured.
Calculate the rate of motion of the movable head as follows: All methods are applicable to material that is relative uniform in strength and stiffness properties. Carefully controlled investigations may require specification or construction of more precise equipment.
Construction of a satisfactory loading head is illustrated in D343. Moisture content specimens also serving 3d043 specific gravity specimens shall be free of density variations and inner ply voids such as knotholes or edge gaps between veneers.
Structural panels in use include plywood, waferboard, oriented strand board, and composites of veneer and of wood-based layers.
It is equally well suited for testing uniform or clear material whenever specimen size is adequate. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. NOTE 2—In cutting specimens to meet the length requirement, it is not intended that the length be changed for small variations in thickness. An approximate correction can be made. Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation.
Active view current version of standard. Significance and Use 3.
ASTM D – 00() Standard Test Methods for 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 test proceeds at a constant rate of loading until either sufficient deflection readings are recorded or until failure occurs, depending upon purpose.
Deflection and modulus of elasticity obtained from this method are related to flexural stress only and do not contain a shear component. 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.
Measured deformation and elastic constants are free of shear deformation effects; and panels can be bent to large deflections without incurring errors from horizontal force components occurring in other methods. Rather it is intended that the nominal thickness be used for determining the specimen length and span. For a discussion of these errors, their effects, and methods for reducing them, refer to Appendix X1. An approximate correction can be made. Link to Active This link will always route to the current Active version atm the standard.
D0343 is equally well suited for testing uniform or clear material whenever specimen size is adequate.
The frames shall be free to move toward or away from each other while under load to preclude application of direct aztm or compression loads at large panel deformations. Referenced Documents purchase separately The documents listed below are qstm within the subject standard but are not provided as part of the standard. The method is frequently used for quality assurance testing of oriented strand board. Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation.