Question

In plastic failure, load corresponding to __________ strain is arbitrarily taken as the failure load.

(a) 10 %

(b) 5 %

(c) 20 %

(d) 50 %

I got this question in unit test.

The query is from Unconfined Compression Test in portion Shear Strength of Geotechnical Engineering I

Answer 1

The correct answer is (c) 20 %

The explanation is: In plastic failure, no definite maximum load is indicated. In such a case, the load corresponding to 20 % strain is arbitrarily taken as the failure load.