To be honest, I have yet to find a quality mass gainer on the market. The problem with most mass gainers is that they are loaded with cheap sugars as a carb source. Not only can this lead to greater fat gain, it can make drinking them several times a day unhealthy.
Mechanical stress: physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion.
This factor is applied to the axial stress produced in the median plane of the specimen (barreled curve). The total axial stress at the time of shearing is sum of major and minor stresses. By the axial stress of the membrane voltage there is a complex condition and the resulting shape known as umbrella. On the other hand the axial stress and hoop stress in the outer region are both compressive nature.