Evaluation of the longitudinal restraint, uplift resistance, and long-term performance of high-density polyethylene crosstie rail support system using static and cyclic loading

Lotfy, Ibrahim; Issa, Mohsen A.

doi:10.1177/0954409716647094

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…The same team explored railroad spike behavior in recycled plastic composite ties, and found that screw spikes exhibited performance well beyond minimum standards ( 11 ). The overall rail support system under static and cyclical loading was also examined with recycled plastic composite ties, and the successful outcome supports incorporation of these ties into railroad infrastructure ( 12 ).…”

Section: Literature and Practice Reviewmentioning

confidence: 99%

Plastic Crisis: Responsible Recycling Within Military Railroad Infrastructure

Stewart

Cisko

Beasley

et al. 2023

Transportation Research Record: Journal of the Transportation R

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Plastic usage has reached unprecedented levels worldwide, and plastic waste disposal has likewise risen from a matter of concern among industrialized nations to a crisis level across the globe. One potential solution is to repurpose or recycle plastic into civil infrastructure. The objective of this paper is to perform a strengths, weaknesses, opportunities, and threats (SWOT) style assessment of recycled plastic railroad ties for military use and the associated effects on military transportation. Recycled plastic has some potential advantages over traditional treated wood for the manufacture of railroad ties, but it also has variable material behavior characteristics. Data provided in this paper show changes both in dimension and in material properties with temperature for recycled plastic and composite railroad ties. Surface temperatures on crossties exceeding 50°F higher than outside air temperatures further explain the gage issues observed throughout U.S. Department of Defense railroad tracks. General trends in tie performance were noted which included seasonal variation in gage, temperature-dependent ductility, and lower load-carrying capacity than wooden ties. These data indicate a need for clear performance specifications to prevent post-installation track usage problems which can affect military readiness and response times and therefore national security.

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Section: Literature and Practice Reviewmentioning

confidence: 99%

Plastic Crisis: Responsible Recycling Within Military Railroad Infrastructure

Stewart

Cisko

Beasley

et al. 2023

Transportation Research Record: Journal of the Transportation R

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“…A comprehensive literature review was conducted to compare material properties of each composite sleeper on the market. [21][22][23][24][25][26][27][28] The modulus of elasticity (MOE) (Figure 1, top) and compressive strengths (Figure 1, bottom) for timber and composite sleepers are summarized below (Figure 1). Among the composite sleepers, a novel glass fiber reinforced composite (GFRC) sleepers provide a skin with higher MOE and compressive strength than other composites.…”

Section: Composite and Timber Sleeper Comparisonmentioning

confidence: 99%

Evaluating glass fiber reinforced composite sleepers to mitigate elastic fastening system spike fatigue failure: A finite element study

Khachaturian

Dersch

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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North American railroads have experienced spike fastener fatigue failures due to spike overloading that have led to multiple derailments. Failures have primarily been found in timber sleeper track constructed with elastic fasteners. This is likely because the elastic fasteners change the load path, resulting in spikes becoming a primary component to transfer the longitudinal forces. Mitigation methods to prevent spike overloading have been limited and thus, this novel study seeks an alternative method leveraging engineered composite sleepers to reduce spike stress. This paper first documents and compares typical composite and timber sleeper properties as reported in the literature. Then, this paper describes the development and validation of a single spike-in-sleeper finite element model (FEM) used to investigate the interaction between the composite sleeper and spike. A glass fiber reinforced composite (GFRC) sleeper was selected due to its high elastic modulus and compressive strength reported in the literature. The validated model was used to quantify the effect of these critical material properties on spikes subjected to longitudinal loads. The GFRC’s stiffness and compressive strength values lead to a 30% reduction in the maximum spike stress when compared to spikes installed in timber sleepers. The reduced spike stress in the GFRC fell below the spike’s expected fatigue limit. Finally, this paper provides required compressive strength for given longitudinal loads to ensure the spike stress falls below the fatigue limit in different operating environments. This characterization of required composite sleeper strength properties can be used to advance track system mechanistic-empirical design.

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“…Results showed similar strength and fatigue resistance of these sleepers with those of the timber sleeper. Lotfy et al [41] conducted a study of the behavior and the long-term performance of the entire rail system with highdensity polyethylene (HDPE) sleeper using static and cyclic test methods. The outcomes of this study showed the behavior of HDPE sleeper under the fatigue loading with normal wear and minimal degradation.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on the mechanical behavior of Kunststof Lankhorst Product (KLP) sleepers

Siahkouhi

Markine

et al. 2021

Scientia Iranica

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This paper studies the mechanical behavior of two types of Kunststof Lankhorst Product (KLP) sleeper, namely low-density polyethylene sleeper (LDPE-16) and high-density polyethylene sleeper (HDPE-25) with 16 mm and 25 mm steel bars diameter, respectively, in static, dynamic and longtime static three points bending moment tests. Therefore, HDPE-25 and LDPE-16 with six strain gauges mounted on their steel bars, were manufactured to assess their mechanical responses. Moreover, a finite element method (FEM) model is developed to perform a sensitivity analysis based on different diameters of steel bars for HDPE with 16 mm (HDPE-16) and LDPE with 25 mm (LDPE-25). The results show that steel bars of LDPE-16 yielded under 4 hours of 30 kN load, while, HDPE-25 shows significant resistance. Numerical results show that HDPE-25 is overdesigned and can be replaced by LDPE-25 which has lower weight and price. The natural frequencies of HDPE-25 are almost 16%, 19%, 16% and 33% higher than the three first bending frequencies and first torsion frequency of LDPE-25, respectively, that proves the better performance of LDPE-25 in case of preventing resonance. Moreover,

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Evaluation of the longitudinal restraint, uplift resistance, and long-term performance of high-density polyethylene crosstie rail support system using static and cyclic loading

Cited by 7 publications

References 5 publications

Plastic Crisis: Responsible Recycling Within Military Railroad Infrastructure

Plastic Crisis: Responsible Recycling Within Military Railroad Infrastructure

Evaluating glass fiber reinforced composite sleepers to mitigate elastic fastening system spike fatigue failure: A finite element study

Experimental and numerical study on the mechanical behavior of Kunststof Lankhorst Product (KLP) sleepers

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