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cmgames said:Calculate what 0.2% of 25.25 is in mm (5.05mm).
cmgames said:thank you for that, i am however still confused as to how to work out the calculation
Calculate what 0.2% of 25.25 is in mm (5.05mm). Multiply that by the answer to your proportion calculation. Offset a parallel line from your line of best fit by that distance.
cmgames said:i see your point however i am basing my calculations on what one of my lecturers emailed me~:~
"If, for example, your horizontal axis shows 5.0mm of extension, and you measure this as being say 220mm, it follows that 1mm in reality is represented by 44mm on your axis (220 divided by 5)
Now multiply 0.2% of gauge length by 44 to obtain the amount of offset "
dewking said:i thought the graph should be stress-strain graph? why is it force-elongation graph? is it the same/?
The 0.2% proof stress of aluminium is calculated by dividing the load at 0.2% strain by the original cross-sectional area of the sample.
The 0.2% proof stress of aluminium is used as a measure of the material's strength and resistance to deformation. It provides valuable information for design and engineering purposes.
Yes, the 0.2% proof stress of aluminium can change over time due to factors such as temperature, strain rate, and microstructure changes. It is important to consider these factors when calculating and using the 0.2% proof stress.
The 0.2% proof stress of aluminium is typically measured in megapascals (MPa) or pounds per square inch (psi). It can also be expressed in newtons per square millimeter (N/mm²) or kilopounds per square inch (ksi).
No, the 0.2% proof stress of aluminium is not the same as yield strength. While both measures indicate the point at which a material starts to deform plastically, the yield strength is typically higher than the 0.2% proof stress and is determined using a different method.