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.
Here are tips for filing taxes in 2015. Wednesday, April 15, is the due date for federal income tax returns for 2014. The deadline for filing state income taxes vary, although most also adhere to the April 15 closing date.State tax deadlines in Delaware and Iowa are a couple of weeks later, on April 30; Virginiaâs is May 1. Alaska, Florida, Nevada, South Dakota, Texas, Washington and Wyoming do not have any state income taxes.ednesday, April 15, is the due date for federal income tax returns for 2014. The deadline for filing state income taxes vary, although most also adhere to the April 15 closing date.