Cui MingJuan, Shao YongBob

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.4, pp. 115-116, 2011, DOI:10.3970/icces.2011.016.115

Abstract Welded tubular structures are widely used in many constructions, such as offshore platforms, which are all consisted of welded tubular members. There is high stress concentration at the intersection between the chord and the brace. As high sress concentration exists along the weld toe, failure usually occurs in this region. To increase the bearing capacity of a tubular joint, it is necessary to take measures to reinforce the region around the weld toe. Therefore, the static strength of rectangular hollow section (RHS) T-joints with local chord reinforcement under in-plane bending load is investigated by using… More >

YANG Jie, SHAO Yongbo, CHEN Cheng

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.4, pp. 111-112, 2011, DOI:10.3970/icces.2011.016.111

Abstract A typical Y-joint is made up of a chord member and a brace member. In this structure, the brace member is usually subjected to axial load, and so the chord is always subjected to radial load which is tranferred from the brace member. As the stiffness of the chord in the radial direction is usually much smaller than that of the brace in the axial direction, failure often occurs near the weld toe on the chord surface. Increasing the thickness of the chord near the weld toe can enlarge the radial stiffness of the chord,… More >

Zhi-quan Zhang, Jia-xiang Chi, Yu-fen Zhang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.3, pp. 95-96, 2011, DOI:10.3970/icces.2011.016.095

Abstract This paper concentrates on the compressive strength of steel tube in Concrete-filled steel tube (CFST) column. Through an elasto-plastic limit analysis based on Twin Shear Unified Strength Theory (TSUST), the vertical load capacity of the steel tube alone was analyzed by adopting a parameter b, which varies from 0 to 1. And the strength reduction factor has been derived by total theory of plasticity. A new analytical formula, capable of predicting the axial bearing capacity of the CFST stub columns subjected to axial compression, has been developed based on the linear approximation of Mises yield More >

Youshi Hong, Chengqi Sun, Aiguo Zhao

The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.3, pp. 91-92, 2011, DOI:10.3970/icces.2011.016.091

Abstract The researches on the behavior of very-high-cycle fatigue (VHCF) for high strength steels have become a new branch in the field of metal fatigue since 1980s. The characteristics of crack initiation and propagation for high strength steels in VHCF regime differ from those in low cycle and high cycle fatigue regimes. One of the most distinct phenomena for VHCF regime is the interior or subsurface crack initiation at inclusions or at other inhomogeneities. In fact, the period of crack initiation and early growth dominates the fatigue life, which is extremely evident for the fatigue process… More >

Bhashya V.¹, Ramesh G.¹, Sundar Kumar S.¹, Bharatkumar B. H.¹, Krishnamoorthy T.S.¹, Nagesh R Iyer.¹

CMC-Computers, Materials & Continua, Vol.25, No.1, pp. 47-74, 2011, DOI:10.3970/cmc.2011.025.047

Abstract Fibre-reinforced polymers (FRPs) are being introduced into a wide variety of civil engineering applications. These materials have been found to be particularly attractive for applications involving the strengthening and rehabilitation of existing reinforced concrete structures. In this paper, experimental investigations and analytical studies on four series of the concrete cylinders wrapped with FRP are presented. First series consist of concrete cylinders wrapped with one layer carbon fiber reinforced polymer (CFRP), second series concrete cylinders wrapped with two layers CFRP, in third series, concrete cylinders were wrapped with one layer glass fiber reinforced polymer (GFRP) and… More >

Jorge Daniel Riera¹, Letícia Fleck Fadel Miguel², Ignacio Iturrioz³

CMES-Computer Modeling in Engineering & Sciences, Vol.82, No.2, pp. 113-136, 2011, DOI:10.32604/cmes.2011.082.113

Abstract In the truss-like Discrete Element Method (DEM), masses are considered lumped at nodal points and interconnected by means of uni-dimensional elements with arbitrary constitutive relations. In previous studies of the tensile fracture behavior of concrete cubic samples, it was verified that numerical predictions of fracture of non-homogeneous materials using DEM models are feasible and yield results that are consistent with the experimental evidence so far available. Applications that demand the use of large elements, in which extensive cracking within the elements of the model may be expected, require the consideration of the increase with size… More >

T.M. Hatem¹, M.A. Zikry¹

CMC-Computers, Materials & Continua, Vol.17, No.2, pp. 127-148, 2010, DOI:10.3970/cmc.2010.017.127

Abstract A three-dimensional multiple-slip dislocation-density-based crystalline formulation, and specialized finite-element formulations were used to investigate dislocation-density evolution and crack behavior in single-packet lath martensite in high strength martensitic steels. The formulation is based on accounting for variant morphologies and orientations, and initial dislocations-densities that are uniquely inherent to martensitic microstructures. The effects of loading plane with respect to the orientation o the habit plane are investigated. Furthermore, the formulation was used to investigate single-packet microstructure mapped directly from SEM/EBSD images of maraging and ausformed martensitic steel alloys. This analysis underscores that shear pipe effects in martensitic More >

A. Rama Chandra Murthy¹, G.S. Palani¹, Nagesh R. Iyer¹

Structural Durability & Health Monitoring, Vol.5, No.3, pp. 201-226, 2009, DOI:10.3970/sdhm.2009.005.201

Abstract This paper presents methodologies for residual strength evaluation of metallic structural components under fatigue loading. Structural components include plate panels of different crack configurations with and without stiffeners. For stiffened panels, stress intensity factor (SIF) has been computed by using parametric equations based on numerically integrated modified virtual crack closure integral (NI-MVCCI) technique. As a part of residual strength evaluation, remaining life has also been predicted by using standard crack growth models. Various methodologies for residual strength evaluation, namely, plastic collapse condition, fracture toughness criterion and remaining life approach have been described. From the studies, More >

Yong-bin Park¹, Jin-Hwe Kweon¹, Jin-Ho Choi¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.2, pp. 39-40, 2009, DOI:10.3970/icces.2009.012.039

Abstract This paper addresses experimental results on the strength of single-lap composite bonded joints with different manufacturing methods and configurations. The joints were fabricated with 4 different methods; Co-curing with additional adhesive (CCA) and without additional adhesive (CCN) between composite adherends, Co-bonding (COB) and secondary bonding (SEB). Joints have 5 different overlap lengths(l), 3 different lay-up patterns and 4 different thicknesses(t), respectively. Width of the joints(w) is constant at 25.4 mm. A total of 389 single-lap specimens were tested in tension. In the test to examine the effect of manufacturing methods and overlap lengths, the joint… More >

Eun A Hwang¹, Haeng-Ki Lee¹, Jong Won Kwark², Jung Woo Lee²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.1, pp. 11-12, 2009, DOI:10.3970/icces.2009.012.011

Abstract Concrete structures such as concrete safety barriers are often subjected to direct impact loads mainly due to vehicle crash impact. In this case, the impact resistance is one of the most critical characteristic of concrete used in such structures. The present study aims to characterize the impact resistance of lightweight aggregate cellular concrete (LACC), which will be used in concrete barriers. Impact tests on LACC specimens were carried out based on the repeated drop-weight impact test guideline recommend by ACI committee 544. Impact resistance and compressive strength of the LACC specimens were characterized and the More >