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.
1 The 2014 Personal Income Tax return and tax are due. 2  When the due date falls on a weekend or holiday, the deadline to file and pay is extended to the next business day. 3  If you are living or traveling outside the United States on April 15, 2015, the due dates for filing your return and paying your tax are different.he 2015 third quarter estimated tax payment is due with Form 540-ES. The last day to file your 2014 Personal Income Tax return with an automatic extension. We assess penalties and interest on any unpaid tax from the original due date of April 15, 2015.