This study is part of a more important one trying to develop a method for characterising metals behaviour at intermediate strain rates.
This paper presents fundamental investigation on the dynamic compressive behavior and constitutive model of roller compacted concrete (RCC) at intermediate strain rates.
The experimental results show that at intermediate strain rates (region II), the sliding behavior of the three grades of Zn 22% Al is similar and that the contribution of boundary sliding to the total strain, ξ, is about 60%.
Assessing the mechanical properties of materials at intermediate strain rates (1 200/s) is one of the major concerns in impact engineering.
Novel devices to impose a designated tensile strain or compressive strain are also developed for tension/compression tests with the high speed material testing machine at intermediate strain rates.
Percentage elongation is found to be 4.87 5.49% at strain rates of 10−4 s−1 and at 10−1 s−1 whereas it showed a relatively higher % elongation (5.42 7.19%) at intermediate strain rates of 10−3 s−1 and 10−2 s−1, indicating intermediate strain rates are better for optimum strength as well as for ductility.
The experimental characterisation of materials at intermediate strain rates often implies the use of split Hopkinson pressure bars.
We describe a novel design of a serpentine Hopkinson transmitted bar that allows for accurate and robust load acquisition at intermediate strain rates in a compact form.
The alloy exhibited ultimate tensile strength in the range of (386 553 MPa) when tested at ambient temperature and strain rates of 10−4 s−1 and 10−1 s−1, whereas it varied from 630 673 MPa at intermediate strain rates of 10−3 s−1 and 10−2 s−10−2
However, this phenomenon shows interesting behavior at intermediate temperature range.
