Evaluation of Cumulative Damage of RC Members under Repeated Impact Loading

In the civil and structural engineering field, there are so many problems regarding act of impact loading against some structures due to natural disaster. So it is important to evaluate the damage condition of them after impact loading, and to estimate the residual performance of them. This study is focused on a reinforced concrete (herein after called RC) structure such as caisson breakwater and rock-shed. In order to quantitatively evaluate the dynamic behavior and cumulative damage of RC members under low-velocity single and repeated impact loading, we conducted numerical approach by using the theory of Continuum Damage Mechanics (herein after called CDM). At the result, we clarified not only impact behavior of the members but also the relationship between cumulative kinetic energy of repeated impact loading and cumulative damage of the members. In addition, applicability limit of our model based on scalar damage modeling was clarified.

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Numerical Studies on Cumulative Damage of RC Members under Repeated Impact Loading

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.82.320 ◽

2011 ◽

Vol 82 ◽

pp. 320-325 ◽

Cited By ~ 1

Author(s):

Hiroki Tamai ◽

Yoshimi Sonoda

Keyword(s):

Numerical Investigation ◽

Impact Loading ◽

Damage Mechanics ◽

Impact Load ◽

Continuum Damage Mechanics ◽

Cumulative Damage ◽

Rc Beam ◽

Repeated Impact ◽

Impact Behaviour ◽

The Impact

We have tried to develop the simple FE analysis method based on continuum damage mechanics to quantitatively evaluate the impact behaviour and the cumulative damage of RC beam under repeated impact loading. As a result, it has been found that the cumulative damage and residual displacement of RC beam under repeated impact load can be properly evaluated, but the crack propagation cannot be evaluated by using the proposed method. This paper presents the following matters: (1) Numerical investigation on the impact behaviour and cumulative damage of RC beam under repeated impact loading by using the proposed method. (2) Numerical investigation of the relationship between cumulative kinetic energy of repeated impact loading and cumulative damage of RC members. (3) Investigation on improved points of our existing proposed method to evaluate the crack path of RC member under repeated impact.

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A bi-dissipative damage model for concrete

Revista IBRACON de Estruturas e Materiais ◽

10.1590/s1983-41952015000100006 ◽

2015 ◽

Vol 8 (1) ◽

pp. 49-65

Author(s):

J. J. C. Pituba ◽

W. M. Pereira Júnior

Keyword(s):

Reinforced Concrete ◽

Structural Engineering ◽

Damage Mechanics ◽

Damage Model ◽

Continuum Damage Mechanics ◽

Concrete Material ◽

Framed Structures ◽

Energy Equivalence ◽

Proposed Model ◽

Damage Processes

This work deals with an improvement of an anisotropic damage model in order to analyze reinforced concrete structures submitted to reversal loading. The original constitutive model is based on the fundamental hypothesis of energy equivalence between real and continuous media following the concepts of the Continuum Damage Mechanics. The concrete is assumed as an initial elastic isotropic medium presenting anisotropy, permanent strains and bimodularity induced by damage evolution. In order to take into account the bimodularity, two damage tensors governing the rigidity in tension or compression regimes are introduced. However, the original model is not capable to simulate the influence of the previous damage processes in compression regimes. In order to avoid this problem, some conditions are introduced to simulate the damage unilateral effect. It has noted that the damage model is agreement with to micromechanical theory conditions when dealing to unilateral effect in concrete material. Finally, the proposed model is applied in the analyses of reinforced concrete framed structures submitted to reversal loading. These numerical applications show the good performance of the model and its potentialities to simulate practical problems in structural engineering.

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Bio-inspired vs. conventional sandwich beams: A low-velocity repeated impact behavior exploration

Construction and Building Materials ◽

10.1016/j.conbuildmat.2018.02.201 ◽

2018 ◽

Vol 169 ◽

pp. 193-204 ◽

Cited By ~ 17

Author(s):

S.H. Abo Sabah ◽

A.B.H. Kueh ◽

M.Y. Al-Fasih

Keyword(s):

Impact Behavior ◽

Sandwich Beams ◽

Low Velocity ◽

Repeated Impact

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Continuum damage mechanics based modeling progressive failure of woven-fabric composite laminate under low velocity impact

Journal of Zhejiang University SCIENCE A ◽

10.1631/jzus.a0900368 ◽

2010 ◽

Vol 11 (3) ◽

pp. 151-164 ◽

Cited By ~ 2

Author(s):

Zhi-gang Hu ◽

Yan Zhang

Keyword(s):

Composite Laminate ◽

Damage Mechanics ◽

Progressive Failure ◽

Continuum Damage Mechanics ◽

Woven Fabric ◽

Low Velocity Impact ◽

Continuum Damage ◽

Low Velocity ◽

Velocity Impact ◽

Fabric Composite

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Investigation of the response of an aluminium plate subjected to repeated low velocity impact using a continuum damage mechanics approach

Fatigue & Fracture of Engineering Materials & Structures ◽

10.1111/ffe.12248 ◽

2014 ◽

Vol 38 (4) ◽

pp. 475-488 ◽

Cited By ~ 10

Author(s):

R. Ghajar ◽

S. M. R. Khalili ◽

M. Yarmohammad Tooski ◽

R. C. Alderliesten

Keyword(s):

Damage Mechanics ◽

Continuum Damage Mechanics ◽

Low Velocity Impact ◽

Continuum Damage ◽

Low Velocity ◽

Velocity Impact

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In-Plane Low Velocity Impact Behavior of GFRP Laminate

Materials Science Forum ◽

10.4028/www.scientific.net/msf.978.257 ◽

2020 ◽

Vol 978 ◽

pp. 257-263

Author(s):

Mahesh ◽

Kalyan Kumar Singh

Keyword(s):

Numerical Analysis ◽

Boundary Conditions ◽

Impact Loading ◽

Weight Ratio ◽

Low Velocity Impact ◽

Impact Behavior ◽

Low Velocity ◽

Velocity Impact ◽

Material Tailoring ◽

Out Of Plane

FRP laminates are used in several industries such as automobile, aircraft’s, spacecraft’s, defense and etc.., where high strength-to-weight ratio is the primary criteria. FRP laminates offer high design and material tailoring properties but are highly susceptible to delamination and debonding under out-of-plane low velocity impact which induces barely visible impact damage (BVID) inside the structures. A lot of research investigation is going on related to damage resistance behavior of FRP laminates under out-of-plane impact loading. But very less concentration is paid to the FRP laminates behavior under in-plane low impact loading. In this numerical analysis in-plane low velocity impact loading is carried out on a bidirectional plain woven glass fiber reinforced epoxy laminate (GFRP) using LS-DYNA. A hemispherical impactor of mass 5kg and diameter of 10mm is impacted at 0.5, 1.0 and 1.5m/sec velocity on [(00/900)/(+450/-450)/(+450/-450)/(00/900)]S layup design. Two boundary conditions complete edge and corner constraining boundary conditions are considered for numerical analysis. Force vs. time, energy vs. time, displacement vs. time plots are used to evaluate the analysis.

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Impact Behavior of Sandwich Beams With Various Composite Facesheets and Balsa Wood Core

10.1115/imece2001/amd-25405 ◽

2001 ◽

Author(s):

J. L. Abot ◽

A. Yasmin ◽

I. M. Daniel

Keyword(s):

Impact Loading ◽

Woven Fabric ◽

Low Velocity Impact ◽

Impact Behavior ◽

Sandwich Beams ◽

Low Velocity ◽

Balsa Wood ◽

Composite Sandwich ◽

Fabric Composite ◽

Comprehensive Study

Abstract This study presents a combined experimental and theoretical analysis of both unidirectional and woven fabric composite sandwich beams under low velocity impact loading. The sandwich beams were fabricated by bonding carbon/epoxy facesheets to a balsa wood core. All constituent materials including facesheets, cores and adhesives were fully characterized separately under stress conditions similar to those encountered in the sandwich structures. A comprehensive study that includes fabrication, mechanical testing and analysis of these structures under both quasi-static and impact loading was performed. The failure mechanisms were also analyzed. Existing models developed by the authors for sandwich beams with PVC foam cores were extended to predict impact loads for sandwich beams with balsa wood core.

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