Biaxial and Shear Testing Apparatus with Force Controls
Abstract
It is an object of the present invention to provide a testing apparatus capable of applying controllable loading forces to be measured for a test specimen. A further object of the present invention is to provide a testing apparatus capable of having a different loading mode in each axis of the plane of the test specimen; that is, tension loading in one axis and compression loading is another axis. A still further object of the present invention is to provide a testing apparatus for in-plane shear and compression and/or tensional testing of orthotropic and anisotropic materials, such as composite materials, fabrics, etc., in a creep testing situation and other testing situations. A still further object of the present invention is to provide a testing apparatus capable of applying non-orthogonal controllable biaxial forces or equal biaxial displacements. To attain the objects described, the present invention improves the apparatus of the Cavallaro reference, and therefore the known art, wherein a tensile or compressive load of a test apparatus can be converted to an unequal, orthogonal or oblique stress state on a planar test specimen by the use of two and/or four load plate assemblies and a controllable fluid pressure system. Six load plate assemblies for a tri-axial loading may also be employed with the controllable fluid pressure system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 30, 2006
- Accession Number
- ADD020246
Entities
People
- Paul V. Cavallaro
Organizations
- United States Department of the Navy