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Keep in mind when dealing with harmonic results that there are two, the real and imaginary.Â It doesn't matter in this case, but there is a apples and oranges relationship between a single static result and a complex harmonic result.Â Obviously the SRSS of a large number with a small number should return the large number.Â When you maximum stress, do you mean maximum equivalent stress?Â That's a derived quantity and it's possible that by removing the signs of the component stresses by SRSS, the equivalent stress got smaller.Â For example, a 2d state of stress where sx is positive and sy is an equal and opposite negative value will produce an equivalent stress of around sx + sy, but if sx and sy are both positive the equivalent stress would be closer to sqrt(sx^2+sy^2).Â Â