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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Design of end supports shall place the center of rotation near the neutral axis of the specimen of average thickness. The length, width and thickness shall be measured within an accuracy of 0.
Standard Test Methods for Structural Panels in Flexure
Have a question about conducting the test for this standard? Radius of curvature of bearing plate or block shall not be so large as to cause bridging as the specimen bends.
All methods are applicable to material that is astk uniform in strength and stiffness properties. Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be considerably larger than nominal.
Also like Method A, aztm method uses small specimens in a center-point simple span test configuration. Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation. The depth of the specimen shall be the thickness of the panel.
NOTE 7—A test rate to achieve f3043 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. It is preferred when equipment is available. The principle of a commercially available flexure testing machine complying with these requirements is diagrammed in the figure below.
The frames shall be free ashm move toward or away from each other while under load to preclude application of direct tension or compression loads at large panel deformations.
This test method covers the flexural properties of strength and stiffness.
ASTM D D determines the flexural properties of strips cut from structural panels or panels up to 4 by 8 ft in size. The method is frequently used for quality assurance testing of oriented strand board.
ASTM D – Structural Panel Flex Test
Total deflection, and modulus of elasticity computed from it, include a relatively constant component attributable to shear deformation.
Link to Active This link will always route to the current Active version of the standard. Moments applied to fail specimens tested by Method A, B or D in which large deflections occur can be considerably larger than atm.
When the principal direction of the face plies, laminations, strands, or wafers is parallel to the span, the length 2 Annual Book of ASTM Standards, Vol Size px x x x x In cases where excessive local deformation may occur, suitable bearing plates shall be used. These properties are of r3043 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 aztm components such as stress-skin panels.
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. The method is frequently used for quality assurance testing of oriented strand board. Variables Influencing Flexure 9. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The supports shall be such that no appreciable crushing of the specimen will occur at these points during the test. Construction of a satisfactory loading head is illustrated in Fig.
Support axes of the loading frames to remain in a parallel relationship throughout the test Note 4. 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. Moisture content specimens also serving as specific gravity specimens shall be free of density variations and inner ply voids such as knotholes astk edge gaps between veneers.
ASTM D 3043 – 00 Structural Panels in Flexure
Method C generally is preferred where size of test material permits. Significant errors in modulus of rupture can occur when nominal moment is used see. Test specimens are strips cut from panels that are up to 4′ by 8′.