کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
514792 | 866820 | 2008 | 12 صفحه PDF | دانلود رایگان |
Based on a micro-structural finite-element model using computer-tomography scans at micrometer length-scale, damage due to frost within hardened cement paste (HCP) is evaluated. In order to verify the microscopic constitutive equations, a multi-scale model is introduced which allows a comparison with experimental data at macro-level. Subsequently, damage due to frost is simulated numerically: the water-filled pores of HCP increase in volume during a freezing process which yields an inelastic material behavior. Numerical simulations at micro-structural level are performed for different moistures and temperatures, and an effective correlation between moisture, temperature and the inelastic material behavior is obtained. Finally, thermo-mechanical coupling is introduced and an effective constitutive equation for HCP is developed using the abovementioned temperature–moisture–damage correlation.
Journal: Finite Elements in Analysis and Design - Volume 44, Issue 5, March 2008, Pages 233–244