1 Yield strength is the lowest stress that produces a permanent deformation in a material. 2  In some materials, like aluminium alloys, the point of yielding is difficult to identify, thus it is usually defined as the stress required to cause 0.2% plastic strain. 3  This is called a 0.2% proof stress.
This year's deadline to file your personal income tax return is midnight on May 5 â five days later than the usual Apr. 30 cutoff. You can thank that nasty Heartbleed computer bug for the extension, after it forced the Canada Revenue Agency to shut down its E-File system earlier in April.his year's deadline to file your personal income tax return is midnight on May 5 â five days later than the usual Apr. 30 cutoff. You can thank that nasty Heartbleed computer bug for the extension, after it forced the Canada Revenue Agency to shut down its E-File system earlier in April.
Many United States residents mark Tax Day as the deadline to file their income tax details to the Internal Revenue Service (IRS). The date is usually on or around April 15.However, this deadline may be extended to accommodate holidays or extreme weather conditions.Tax Day is an important date to remember.n some years in Washington DC, Emancipation Day may be the reason to extend the deadline for filing an income tax return (Tax Day). In 2007, the observance Emancipation Day in Washington DC had the effect of nationally extending the 2006 income tax filing deadline from April 16 to April 17.