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.
The due date for C corporations to file Form 1120, U.S. Corporation Income Tax Return, will move from March 15 to April 15 (or the 15th day of the 4th month after the end of its tax year).ue date will be March 15 (or the 15th day of the 3rd month after the end of its tax year). The due date for filing the FBAR, Report of Foreign Bank and Financial Accounts, will move from June 30 to April 15.