Dynamic triaxial compression experiments on borosilicate and soda-lime glass
Abstract
A series of compression experiments were performed on borosilicate and soda-lime glass using a triaxial compression Kolsky bar. The triaxial compression Kolsky bar differs from a traditional Kolsky bar by having two pressure chambers, one enclosing the specimen and the other enclosing the end of the transmission bar, so that a specimen may be pre-stressed axially and radially before a dynamic axial load is applied. The result is a modified Kolsky bar capable of measuring axial deformation and axial stresses of a specimen at various strain rates under a range of confinement pressures. Borosilicate glass was subjected to triaxial confinement pressures of 25 MPa, 50 MPa, and 100 MPa at a strain rate around 1500 s-1, and soda-lime glass was subjected to triaxial confinement pressures of 25 MPa, 50 MPa, and 75 MPa at a strain rate of around 1100 s-1. These results were compared to unconfined experiments at similar strain rates, as well as unconfined experiments on a servo-hydraulic machine at a strain rate of 0.001 s-1. It was concluded that glass under compression is not sensitive to strain rate, and glass confined triaxially has a higher strength than unconfined glass. However, strength did not vary much over the range of confinement pressures observed.
Degree
M.S.A.A.
Advisors
Chen, Purdue University.
Subject Area
Aerospace engineering|Materials science
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