Select this check box if you want Warp or Stress analysis to consider the effect of mold thermal expansion on the warpage and/or molded-in stress levels in the part.
During injection molding, the mold expands as the temperature increases, causing the cavity to become larger than its initial dimensions. This cavity expansion helps to compensate for part shrinkage during cooling, resulting in actual shrinkage that is smaller than that predicted without accounting for thermal expansion of the mold.