The mechanical performance and a rate-dependent constitutive model for Al3Ti compound
| Autor: | Jinguang Du, Kun Liu, Jian-xiu Liu, Jun Ma, Yang Cao, Wenbin He, Dan-dan Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Work (thermodynamics) Materials science Constitutive equation Computational Mechanics Intermetallic Numerical simulation 02 engineering and technology 01 natural sciences 010305 fluids & plasmas 020901 industrial engineering & automation Brittleness 0103 physical sciences medicine Composite material JH-2 model Mechanical Engineering Metals and Alloys Stiffness Titanium aluminide Strain rate Compression (physics) Quasi-static and dynamic compression tests Military Science Compressive strength Ceramics and Composites Ballistic test medicine.symptom |
| Zdroj: | Defence Technology, Vol 16, Iss 3, Pp 627-634 (2020) |
| ISSN: | 2214-9147 |
| DOI: | 10.1016/j.dt.2019.09.012 |
| Popis: | The Al3Ti compound has potential application in the high temperature structure materials due to its low density, high strength and stiffness. The mechanical behaviors of the material under different loading rates were studied using compression tests. The results indicate that Al3Ti is a typical brittle material and its compressive strength is dependent on the strain rate. Therefore, a series of rate-dependent constitutive equations are needed to describe its mechanical behaviors accurately. However, it is still short of professional research on the material model for Al3Ti. In this study, the material model was developed on the basis of JH-2 constitutive equations using the experimental data. The model was then applied in simulating the impact process of Ti/Al3Ti metal-intermetallic laminate composites so as to validate the established model. Good agreement between simulation and experiment results shows the constitutive model predict the material responses under high rate and large deformation accurately. This work provides more support for the theoretical and numerical research on the intermetallic. |
| Databáze: | OpenAIRE |
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