New thin shells made of composite structural insulated panels

Uddin, Nasim; Du, Wenfeng

doi:10.1177/0731684414549492

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…However, two drawbacks of CSIPs are still noticeable when they are used as oors or large span roofs. One is the de ection of CSIPs is large relatively in despite of the high strength [10][11][12][13]. e elastic modulus of GFRP is comparatively small, which leads to a large de ection of CSIPs.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behaviors of Concrete/EPS-Foam/Glass-Fiber Composite Sandwich Panel

Liu

Uddin

et al. 2018

Advances in Materials Science and Engineering

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Composite structural insulated panels (CSIPs) have been developed for structural floor applications instead of traditional structural insulated panels (SIPs). However, the load bearing capacity of CSIPs is low due to the debonding between the top face sheet and the core when they are used for floors. To overcome this drawback, an improved composite structural insulated panel (ICSIP) was proposed and analyzed in this paper. In ICSIPs, a thick layer of concrete is used as the top face sheet instead of glass-fiber-reinforced polymer (GFRP) in CSIPs to increase the stiffness of the top compression face sheet. However, the bottom GFRP face sheet and EPS cores in CSIPs are preserved to reduce the weight of the structure and act as a template for the top concrete panels. Full-scale experimental testing and finite-element analysis were conducted to predict the flexural strength and deflection of the ICSIP floor member. Good agreement has been observed between the numerical results and experimental response up to the failure. The cause of failure of ICSIPs is the crushing of concrete face sheet rather than debonding. Moreover, the calculation formula for the ultimate bearing load and deflection was also developed based on the classical sandwich theory. The theoretical predictions reflect well the linear flexural response of the ICSIPs, while deviate as the load increases up to failure due to the theory limitations.

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Section: Introductionmentioning

confidence: 99%

Flexural Behaviors of Concrete/EPS-Foam/Glass-Fiber Composite Sandwich Panel

Liu

Uddin

et al. 2018

Advances in Materials Science and Engineering

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“…Under the bending test, NSIPs sustained 190% more bending stress than traditional OSB SIPs and 70% weight reduction compared to OSB SIPs. More recently, Uddin and Du (2014) reported their work on new thin shells made of composite structural insulated panels and confirmed that the new SIPs were not only usable, but also competitive.…”

Section: Introductionmentioning

confidence: 90%

The Structural Behavior of Hybrid Structural Insulated Panels under Pure Bending Load

Fajrin¹,

Zhuge²,

Bullen³

et al. 2017

IJTech

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This paper presents the structural behavior of newly-developed hybrid structural insulated panels (SIPs) formed by incorporating lignocellulosic composites-jute fiber composite (JFC) and medium-density fiber (MDF)-as intermediate layers between aluminum skin and an expanded polystyrene (EPS) core. The investigation was conducted as an experimental work. A four-point bending load was performed to create pure bending conditions, and the samples were prepared in accordance with ASTM C 393-00 standards. Testing was performed using a 100 kN servo-hydraulic machine with a loading rate of 5 mm/min. The results show that the incorporation of intermediate JFC or MDF layers enhanced the flexural behavior of the SIPs. The ultimate loads of hybrid SIPs with JFCs or MDF were, respectively, approximately 62.59% and 168.58% higher than the ultimate load achieved by SIPs without intermediate layers.Hybrid SIPs exhibited a much larger area under the load-deflection curve than those of conventional SIPs; this points to the toughness of the material and its ability to sustain larger compression strain prior to reaching their ultimate loads, which prevents them from prematurely failing under buckling or indentation.

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“…Uddin et al investigated the behavior of the whole bending of CSIP wall panels (CSIPs) under concentric and eccentric load in a plane [31,32]. Du and Uddin presented concepts of the new CSIP thin-walled laminated shell, which it is different from the traditional concrete thin shell [33].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Property Research for CSIP Thin-Wall Box-Beams

Li,

Uddin,

Zhao

et al. 2023

Buildings

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Composite structural insulated panels (CSIPs) are eco-friendly, high-performance materials, which not only good have mechanical properties, but also good waterproof, moisture-proof, fire-proof, and anti-corrosion characteristics, so they have been used to build envelope structures in recent years. However, how to improve stiffness of CSIPs remains unsolved. The poor stiffness is one of the biggest obstacles for the application of CSIPs in the load-bearing members of civil engineering. In this study, the layout of glass–polypropylene (PP) laminate layers is designed to enhance its stiffness, and this study applies CSIPs as load-bearing members of civil engineering for the first time. Thus, the bend model of CSIP thin-wall box-beams under uniform loading is built, based on Timochenko’s theory. The deflection curve equation is presented, considering shearing deformation. The expressions for the bending of normal strain flanges of the beam and the equation considering principal shearing strain at the beam’s web are obtained, respectively. Finally, mechanical properties of the thin-wall box-beam under uniformly distributed loads were performed by FE. FE results are entirely consistent with the theoretical results, thereby making the theoretical method applicable for the design of thin-wall box-beams, which are made of composite materials. Different from other beams, the shearing deformation is a critical factor that influences the deformation of thin-walled box-beams.

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New thin shells made of composite structural insulated panels

Cited by 8 publications

References 17 publications

Flexural Behaviors of Concrete/EPS-Foam/Glass-Fiber Composite Sandwich Panel

Flexural Behaviors of Concrete/EPS-Foam/Glass-Fiber Composite Sandwich Panel

The Structural Behavior of Hybrid Structural Insulated Panels under Pure Bending Load

Mechanical Property Research for CSIP Thin-Wall Box-Beams

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