what is the difference between point of inflection and contraflexure?
Point of inflection is the point where a curve changes its curvature, that is f''(x) = 0 and f"'(x) not equal to 0. ... That is, the point of contraflexure is for Bending Moment Diagram while Point of inflection is the corresponding point in Elastic curve of the beam and here beam changes curvature.