Abstract
In this study, triaxial cyclic loading and unloading compression tests were performed on concrete specimens under six confining pressures (0, 5, 10, 20, 30, and 40 MPa). The elastic modulus was reduced to characterize the damage, and the damage-plastic strain relationships under different confining pressures were determined. The results showed that the damage evolution rate declined significantly as the confining pressure increased. The experimental results of the uniaxial-tension cyclic loading and unloading tests were combined to derive a damage evolution equation that reflected the hydrostatic pressure effect, and the material parameters were determined by using experimental data. Finally, the derived damage evolution equation was embedded into the Holmquist-Johnson-Cook model and applied to numerical simulations of a concrete slab under projectile impact. The results indicated that the modified Holmquist-Johnson-Cook model can accurately explain the damage evolution process of a concrete slab under projectile impact. Thus, the proposed equation can describe the damage evolution processes of concrete slabs under both impact compression and tension.
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Acknowledgments
This work was supported by the NSFC (Grant Nos. 12172178 and 11802001) and the Open Foundation of the Hypervelocity Impact Research Center of CARDC (Grant No. 20200203).
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Huang, R., Liu, H., Li, Y. et al. Damage Evolution Equation Reflecting Hydrostatic Pressure Effect and Its Application to Concrete Slabs under Projectile Impact. KSCE J Civ Eng 26, 2295–2304 (2022). https://doi.org/10.1007/s12205-022-0946-z
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DOI: https://doi.org/10.1007/s12205-022-0946-z