Abstract: A method and system are provided for obtaining force-displacement responses for a specimen or sample of material. The sample is supported with a spanning portion spanning in an environment between at least three points not in a line, wherein the points are fixed relative to each other, and wherein the spanning portion is capable of displacement relative to the points. An oscillating mechanical excitation at at least one frequency and at at least one known amplitude is applied to the spanning portion. In addition, at least one other mechanical excitation is also applied to the spanning portion independently of the oscillating mechanical excitation.

Abstract: A plough having a share with an accompanying tip that is removably secured on the bottom front portion of the share. The tip is so constructed and arranged that it is adjustable on the plough share so that the extent of life of use of the tip can be significantly increased. Thus, the maximum use of a plough share tip may be effectuated.