Strain Conditions in Compression Cylinder

It is probable that in the future the most fruitful advances in design and estimates of performance of soil-structures will come from methods based on a consideration of the stress-strain behavior of the soil. Stress-strain data in the past have come mainly from the triaxial compression test, and much attention has been expended in improving equipment and test techniques. A recent advance in the technique of testing is that involving the use of lubricated plantens, first reported by Rowe and Barden (3), in which the boundary end restraint and therefore the boundary shear stresses are reduced to negligibly small values compared with those of more conventional tests in which rough platens are used.