Compression test on wood lab manual

Wood with perpendicular tissues Compressive Strength (σmax); /= KPa. Conclusion and recommendation: This test, just like any other test performed in the lab, can have room for some error. The error might arise from the fact that measurements were manually taken and read inside the lab using the Vernier caliper/5(15). Measure the original length and diameter of the specimen. The length may either be length of gauge section which is marked on the specimen with a preset punch or the total length of the specimen 2. Insert the specimen into grips of the test machine and attach strain-measuring device to it. 3. Wood has unique, indepen- increase the cross sectional area. dent properties in the three mutually perpendicular axes: In a compression test the specimen is clamped at the The compressive strength of lumber parallel to the grain www.doorway.ruted Reading Time: 10 mins.

Compression testing of wood materials is the opposite of tensile testing in that instead of pulling the ends away from each the ends are pushed together. There are two different forms of compression testing: with grain and perpendicular to grain, each of which reveal a different set of characteristics about the tested material. A compression test can be performed on UTM by keeping the test-piece on base block (see in fig.) and moving down the central grip to apply load. It can also be performed on a compression testing machine. A compression testing machine shown in fig. it has two compression plates/heads. The upper head moveable while the lower head is stationary. 2. Compression Test On Wood 3. Double Shear Test On Metal 4. Torsion Test On Mild Steel Rod 5. Impact Test On Metal Specimen (Izod And Charpy) 6. Hardness Test On Metals (Rockwell And Brinell Hardness Tests) 7. Deflection Test On Metal Beam 8. Compression Test On Helical Spring 9. Deflection Test On Carriage Spring Test On Cement.

Uniaxial Compression This section of the laboratory experiment involved subjecting Cu (%), α-brass (% Cu, 35% Zn, 1% Pb), aluminum , steel , and alumina (porous and non-porous) to uniaxial compression using the Instron Model (Fig. ). Two measurements of the initial. 1 Procedure Perpendicular: Place the 6” specimen on the base plate of the testing machine. Place a 2” loading plate on top of the specimen in the middle. Zero the testing machine by barely placing the loading sphere on the specimen. Apply the load at in/min and at each lb increment record the deformation. Weigh and measure height in 5 places, (center and 4 quarters) and diameter in 4 places along the side. (the same 4 quarters) Record measurements on sheet in figure 1. Immerse the specimen in water, at room temperature, for one day to complete the seven day curing period required for the compressive strength test.