Answer:
Yes, fracture will occur
Explanation:
Half length of internal crack will be 4mm/2=2mm=0.002m
To find the dimensionless parameter, we use critical stress crack propagation equation
and making Y the subject
Where Y is the dimensionless parameter, a is half length of crack, K is plane strain fracture toughness, is critical stress required for initiating crack propagation. Substituting the figures given in question we obtain
When the maximum internal crack length is 6mm, half the length of internal crack is 6mm/2=3mm=0.003m
and making K the subject
and substituting 260 MPa for while a is taken as 0.003m and Y is already known
Therefore, fracture toughness at critical stress when maximum internal crack is 6mm is 42.455 Mpa and since it’s greater than 40 Mpa, fracture occurs to the material
Answer:
The U.S. has embassies in all countries it recognizes apart from Bhutan, Iran, Maldives, North Korea, Syria and Yemen. It has 'interest sections' in other nation's embassies in Iran and Syria. It also has a de facto embassy in Taiwan.
Answer:
This is False because people can have more than 1
Answer:
(D) Unlike traditional techniques, 3-D printing results in some wasted material.
Explanation:
3-D printing :
1. It is also known as additive manufacturing.
2. It can use for complex shape printing.
3.It is generally use in fashion areas.
4. In this printing method wasted material is very low as compare to traditional printing.
5.It is use CAD system for printing.
So the option D is correct.
(D) Unlike traditional techniques, 3-D printing results in some wasted material.
It is convenient to model a structural element like a beam when a significant amount of forces produce the stress called flexion.
Flexion occurs when an element is supported on one or more supports and a force is presented between them, driving a bending moment in the element.