Ultimate strength of stiffened plates with a square opening under axial and out-of-plane loads

Kumar, M. Suneel; Alagusundaramoorthy, P.; Sundaravadivelu, R.

doi:10.1016/j.engstruct.2009.06.003

Cited by 19 publications

(2 citation statements)

References 22 publications

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“…Young's modulus of elasticity (E), yield stress (σ y ) and poisson's ratio (υ) are considered as 1.8 × 10 5 N/mm 2 , 218 N/mm 2 and 0.3 correspondingly. Convergence study was done and optimal element size of 35.55 mm × 35 mm for the plate and 25 mm × 35 mm for the stiffener are found to give satisfactory results (Suneel Kumar, 2006). The load/deflection curve obtained using the developed model compared well with the analytical and numerical studies conducted by Ueda and Yao (1983) (Fig.…”

Section: Numerical Studymentioning

confidence: 91%

Ultimate strength of orthogonal stiffened plates subjected to axial and lateral loads

Kumar

Alagusundaramoorthy

et al. 2010

KSCE Journal of Civil Engineering

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Orthogonal stiffened plates present in the ship deck are subjected to axial compression due to hogging and sagging bending moments and, lateral load due to cargo load. The main objective of this investigation is to determine the ultimate load carrying capacity and study the interactive behaviour of orthogonal stiffened plates under axial and lateral loads. Tests were conducted on six stiffened plates with plate slenderness ratios of 80 and 64, and corresponding column slenderness ratios of 24 and 26. Hydraulic jacks and inflatable air balloon with load control mechanism were fabricated to apply axial and lateral loads on the test specimens respectively. All the specimens were tested up to ultimate load and the mode of failure was determined based on the initial yielding observed in the plate and/or stiffener. Nonlinear finite element analysis of test specimens was performed using the general purpose FE software ANSYS ® . Both material and geometric nonlinearities were considered in the FE analysis of test specimens. The ultimate loads obtained from the finite element analysis were compared with experimental data and found to be satisfactory. It was also observed that the mode of failure obtained from finite element analysis is similar as observed from experiments. It was concluded that the increase in lateral load beyond two thirds of ultimate lateral load significantly reduces the axial ultimate load carrying capacity of stiffened panels. The interactive effect of stiffened plates subjected to combined action of axial and lateral loads is determined as nonlinear.

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Section: Numerical Studymentioning

confidence: 91%

Ultimate strength of orthogonal stiffened plates subjected to axial and lateral loads

Kumar

Alagusundaramoorthy

et al. 2010

KSCE Journal of Civil Engineering

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“…The behavior of unstiffened plates with rectangular openings under different circumstances, including plate slenderness, opening area ratio, and opening position ratio, was investigated by Yu and Lee [13]. In their investigation of the post-peak behavior under axial and out-of-plane loads, Kumar et al [14] used finite element (FE) analysis to study the behavior of stiffened plates with angle sections and square openings up to collapse. Li et al [15] examined the mechanical behavior of common composite structures with fully accessible holes while taking alternative materials into consideration.…”

Section: Introductionmentioning

confidence: 99%

Structural Influence of the Cargo Holds of a 3000 m3 Wellboat on a Double-Bottom Floor

Silva-Campillo,

Pérez-Arribas

2024

JMSE

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In order to reduce weight and facilitate maintenance, servicing and inspection, ship structures usually have openings and cutouts. However, these modifications frequently weaken the plates’ ability to buckle. In this work, the combined effects of geometric discontinuities (such as openings and cutouts) under diverse in-plane loads (such as horizontal compression, vertical compression, biaxial compression, and in-plane edge shear loading) are taken into consideration as the perforated plates located in the double-bottom floor of a 3000 m3 wellboat are investigated for their linear and elastic buckling behavior. In order to assess the effects of various stiffening methods and their interactions with different load scenarios, as well as fluctuating plate slenderness ratios, the research combines experimental and numerical analyses. This thorough study identifies the best stiffening technique and suggests alternative geometries that minimize structural weight through topology optimization. The research’s findings are helpful in comprehending the mechanisms underlying structural failure and in offering design and recommendation guidelines that enhance hull inspections and the assessment of structural flaws.

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Experimental Investigation on Static and Free Vibration Behavior of Concentrically Stiffened Plates

Mandal

Mitra

Sahoo

2019

Lecture Notes on Multidisciplinary Industrial Engineering

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Ultimate strength of stiffened plates with a square opening under axial and out-of-plane loads

Cited by 19 publications

References 22 publications

Ultimate strength of orthogonal stiffened plates subjected to axial and lateral loads

Ultimate strength of orthogonal stiffened plates subjected to axial and lateral loads

Structural Influence of the Cargo Holds of a 3000 m3 Wellboat on a Double-Bottom Floor

Experimental Investigation on Static and Free Vibration Behavior of Concentrically Stiffened Plates

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