Axial loading material testing
AssigneeInstron Corporation
InventorDavid W. Scanlon
Life of this patent
Estimating the term…
Abstract
A grip for a material testing load frame including a grip plate for engaging the end of an elongated sample having a longitudinal axis and a grip body having one end for connecting to the grip plate and another end for connecting to a loading component of the frame, a mechanism for adjusting the concentricity of the plate with respect to the body, and a mechanism for adjusting the angle of the plate with respect to the body, so that when the sample end is engaged by the plate, and the grip body is connected to the loading component, the longitudinal axis and the axis of the loading component can be aligned with respect to the concentricity and angle.
Claims22
Apparatus for testing comprising:
- load means for applying tensile and compressive loads, said load means comprising a loading component, and
- a grip connected to said load means, said grip comprising
- a grip plate having means for engaging the end of an elongated sample having a longitudinal axis,
- a grip body having one end connected to said grip plate and another end connected to said loading component, said loading component having a load axis,
- concentricity adjustment means for lockably adjusting the concentricity of said plate with respect to said body, and
- angle adjustment means for lockably adjusting the angle of said plate with respect to said body,
- whereby, when said end of said sample is engaged by said plate, said longitudinal axis and said load axis can be aligned with respect to concentricity and angle, locked in place and maintained in alignment during tensile and compressive testing by said concentricity adjustment means and said angle adjustment means.
A material testing load frame comprising:
- a pair of columns,
- a table between said columns,
- a crosshead between said columns and above said table to define a testing region between said columns, table and crosshead,
- an actuator connected to said table for applying tensile and compressive loads along a load axis,
- a load cell connected to said crosshead for transmitting tensile and compressive loads along a load axis,
- a pair of grips connected to said load cell and actuator, at least one said grip comprising
- a grip plate having means for engaging the end of an elongated sample having a longitudinal axis,
- a grip body having one end for connecting to said grip plate and another end connected to said load cell or said actuator,
- concentricity adjustment means for lockably adjusting the concentricity of said plate with respect to said body, and
- angle adjustment means for lockably adjusting the angle of said plate with respect to said body,
- whereby, when said end of said sample is engaged by said plate, said longitudinal axis and said load axis can be aligned with respect to concentricity and angle, locked in place and maintained in alignment during tensile and compressive testing by said concentricity adjustment means and said angle adjustment means.
Dependencies are inferred from the claim text.