HELP! Calculate stress applied to slip direction

Hi All,
Im having some trouble in one of my classes and cant figure out how to do the following:

If a single crystal of an FCC metal yields with an applied load of 1MPa in the [1 -1 2] direction, at what stress would the same metal yield if the load were applied in the [0 1 4] direction. The problem can be solved by using (1 1 1) as the slip plane.

Any help would be greatly appreciated! Im pretty sure this class is going to kill me.


Science Advisor
Homework Helper
Gold Member
Hi akhanijow, welcome to PF. Do you know how to calculate the resolved stress on a certain plane due to a load on another plane? (This is sometimes called the Schmidt factor.)
Hi, He never really tought us that in class. He showed us:

(u1u2*v1v2*w1w) / [sqrt(((u1)^2+(v1)^2+(w1)^2) * ((u2)^2+(v2)^2+(w2)^2)


Staff Emeritus
Science Advisor
Gold Member
What is your textbook? Please read the section on critical resolved shear stress (on a single crystal).

Henceforth, use the Homework & Coursework section of the forums (see my signature) for questions like this.

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