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: The deadline to efile a 2016 tax return, with or without an extension, is October 16. Start your return below: Start Your 2016 Tax Return Now! Now that you have filed or efiled a tax extension, you have met your filing requirements (until October 16), but NOT your payment obligations if you owe taxes. If you did not file a tax return or extension by April 18, you have until October 16, 2017 to efile your 2016 Tax Return. What if your tax extension was rejected? If the IRS did not accept your extension, you should efile your tax return as soon as possible.