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.
Important Dates The taxation year for Canada is January to December and, in general, you are required to file your tax return on or before April 30. For example, for the income you earned from January 2011 to December 2011, you should have filed your tax return by April 30, 2012.f you owe tax to the government and/or don't file your taxes by the due date, you will be liable to pay interest and penalties to the Canada Revenue Agency (CRA) . Compound daily interest is charged on the unpaid amounts starting from May 1, at a prescribed interest rate.