Numerical Model Building and Optimization of Concrete Based on the CT Images and Digital Volumetric Speckle Photography

Yongliang Liu; Qianwen Sun; Lingtao Mao; Jie Gao; Haicheng Su
May 2015
Applied Mechanics & Materials;2015, Vol. 782, p349
Academic Journal
In recent years, the research on the mesostructure of the concrete by using numerical simulation has been a hot topic. Mesoscopic research would contribute to reveal the concrete cracking failure mechanism. In this paper, the aggregate, the mortar, the interface and the pore are segmented based on CT images. With the aid of Mimics software, the numerical model for ANSYS is built. Besides this, the concrete specimen under uniaxial compression is scanned by using micro-CT in situ. The volumetric images under different loadings are acquired. By using digital volumetric speckle photography (DVSP) method, interior 3D deformation is obtained. Combined with the experiment results, the numerical model is optimized. Based on the optimized model, mesoscopic mechanics of concrete is analyzed by using numerical simulation.


Related Articles

  • Axial Deformation of the Planetary Differential Micro-displacement Mechanism with Finite Element Analysis. Fan, S. T.; Guo, X. P. // Applied Mechanics & Materials;2014, Issue 682-686, Special section p358 

    Based on the study of planetary differential roller screw, a planetary differential micro-displacement mechanism is designed for tool compensation. Axial stiffness is an important factor of over-all properties of planetary roller screw. The structure of planetary differential roller screw is...

  • Numerical Simulation of Surge in Axial Compressor. Du, Wenhai; Léonard, Olivier // International Journal of Rotating Machinery;2012, p1 

    The object of this paper is to provide a reliable tool to simulate the stationary and transient operation performances in multistage axial compression systems, especially poststall behavior. An adapted version of the 1D Euler equations with additional source terms is solved by a time marching...

  • Effects of Tip Clearance Size on Flowfield in a Low-Speed Axial Compressor Rotor. Zhenzhen Duan; Yangwei Liu; Lipeng Lu // Applied Mechanics & Materials;2014, Issue 543-547, p158 

    The simulations of a low-speed axial compressor rotor with two tip clearance sizes, 0.5% chord and 1.5% chord, were performed in the study. Overall performance and detailed flow fields at near stall condition are analyzed. The results show that the rotor stall occurs at higher mass flow...

  • Flow and Performance Calculations of Axial Compressor near Stall Margin. Yoojun Hwang; Shin-Hyoung Kang // AIP Conference Proceedings;6/28/2010, Vol. 1225 Issue 1, p605 

    Three-dimensional flows through a Low Speed Research Axial Compressor were numerically conducted in order to estimate the performance through unsteady and steady-state simulations. The first stage with the inlet guide vane was investigated at the design point to confirm that the rotor blade...

  • Grain-based characterisation and acoustic wave propagation in a sand packing subject to triaxial compression. Saadatfar, Mohammad; Francois, Nicolas; Arad, Alon; Madadi, Mahyar; Sheppard, Adrian; Senden, Tim; Knackstedt, Mark // AIP Conference Proceedings;Jun2013, Vol. 1542 Issue 1, p571 

    This paper presents a study of 3D deformation process in a dry packing of Ottawa sand. X-ray microtomography is used to acquire scans of a triaxial test of the sample at five axial stress levels. Using 3D image analysis we are able to resolve particle scale features. Particle tracking combined...

  • Statics and Dynamics of a Rod under Axial Compression. Belyaev, Aleksandr K.; Morozov, Nikita F.; Tovstik, Petr E. // AIP Conference Proceedings;2015, Vol. 1648 Issue 1, p1 

    Some new aspects in a classic problem of axial rod compression are presented. For short-term impact the influence of longitudinal waves propagation on the rod instability is investigated. For the long-term compression which considerably exceeds the Euler load, the generalization of the...

  • Investigation of bullet penetration in ballistic gelatin via finite element simulation and experiment. Yoon, Gil; Mo, Jun; Kim, Ki; Yoon, Chung; Lim, Nam // Journal of Mechanical Science & Technology;Sep2015, Vol. 29 Issue 9, p3747 

    To qualitatively understand the deformation processes and damages in the human body caused by high-speed impact, we conducted experimental and computational investigations for bullet penetration into viscoelastic ballistic gelatin blocks. Because it is difficult to measure the strain...

  • Microbubble skin friction reduction on an axisymmetric body under the influence of applied axial pressure gradients. Clark, H.; Deutsch, S. // Physics of Fluids A;Dec91, Vol. 3 Issue 12, p2948 

    The influence of both a favorable and an adverse applied axial pressure gradient on microbubble-induced skin friction reduction was examined. An 87 mm diameter, 632 mm long model equipped with a 273 mm long cylindrical force balance was employed. Experiments were carried out in a 305 mm diameter...

  • No rise in compressor sales for two years.  // Professional Engineering;11/03/99, Vol. 12 Issue 20, p12 

    Predicts the continuation of the downward trend in compressor sales in Great Britain. Decline of engineering output in 1999; Anticipated rate of depression of demand for axial compressors.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics