Aircraft Tire/Pavement Pressure Distribution

Tielking, J T

doi:10.21236/ada279100

Cited by 12 publications

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“…One of the seminal works related to modeling nonuniform contact pressure distributions of aircraft tires was written by Tielking ( 13 ). In his study, he used a finite element program to generate the nonuniform contact pressure distributions of several different aircraft tires using shell elements.…”

Section: Numerical Approximation Of Tire Contact Characteristicsmentioning

confidence: 99%

“…In his study, he used a finite element program to generate the nonuniform contact pressure distributions of several different aircraft tires using shell elements. This section will exercise the approach proposed here by comparing the resulting contact pressure distributions generated by inverse analysis with those produced by Tielking ( 13 ). He provided tabulated data for various aircraft tires under normal load and inflation pressure and provided surface plots of the F-4 tire for the sensitivity analyses.…”

Section: Numerical Approximation Of Tire Contact Characteristicsmentioning

confidence: 99%

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Near Surface Pavement Response Using a Numerically Approximated Tire Contact Pressure From Inverse Analysis

Stache

2022

Transportation Research Record: Journal of the Transportation R

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Current military flexible pavement design is based on a mechanistic–empirical methodology, in which the mechanistic response is sometimes computed using a layered elastic analysis (LEA) approach. The assumption in most LEA computer programs is that the load is applied uniformly over a circular contact area. In most cases where subgrade rutting failures are expected, this assumption provides satisfactory results when the responses are computed in the subgrade far from the applied load. But in the case of thin asphalt structures with marginal base materials, base failures could potentially occur and the effects of nonuniform tire contact pressure could be more prominent. This study presents a numerical approximation method of obtaining a possible nonuniform, noncircular tire contact pressure distribution using the LEA framework. The iterative procedure attempts to match the true contact area and satisfies the requirements of static equilibrium using inverse analysis. The results showed that the numerical approach provided more reasonable near surface responses compared with the uniform contact pressure assumption and was noticeably more efficient than its finite element counterpart. The findings suggested that the numerical procedure could provide a sound mechanistic alternative for designing thin asphalt pavements with marginal base materials where base failures are likely to occur.

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Section: Numerical Approximation Of Tire Contact Characteristicsmentioning

confidence: 99%

Section: Numerical Approximation Of Tire Contact Characteristicsmentioning

confidence: 99%

Near Surface Pavement Response Using a Numerically Approximated Tire Contact Pressure From Inverse Analysis

Stache

2022

Transportation Research Record: Journal of the Transportation R

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“…Under heavy aircraft weight, the bending stress in the bulged sidewall of the tire could cause high vertical contact stresses under the edge ribs, while the tire acts like a membrane in the center regions, resulting in vertical contact stresses approximately equal to tire pressure under the center ribs. Field measurements have shown that the vertical contact stresses under the edge ribs of aircraft tires could be 1.5 to three times the inflation pressure, depending on the load applied on the tire (20)(21)(22)(23). In addition, the contact lengths of various ribs were found to be similar to each other because of the aircraft heavy load on tires.…”

Section: Tire Contact Stressesmentioning

confidence: 99%

Three-Dimensional Finite Element Modeling of Instrumented Airport Runway Pavement Responses

Wang

Al-Qadi

Portas

et al. 2013

Transportation Research Record: Journal of the Transportation R

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The objective of this paper is to analyze runway pavement responses under moving\ud aircraft tire loading using a developed three-dimensional (3-D) finite element (FE) model.\ud The instrumented runway at Cagliari-Elmas airport (Sardegna, Italy) was modeled in the\ud analysis, which consists of a 350-mm asphalt layer, a 400-mm granular base layer, and\ud subgrade. The FE model characterized the asphalt layer as a linear viscoelastic material,\ud and two interface bonding conditions between asphalt layers (full bonding and partial\ud debonding) were used in the analysis. The aircraft tire loading was simulated using a\ud nontraditional loading assumption that represents the non-uniform distribution of tire\ud contact stresses along contact length and width under five ribs of an aircraft tire. Analysis\ud results show that traditional loading assumption that assumes uniform contact stresses at\ud the tire-pavement interface underestimates the critical tensile and shear strains in the\ud asphalt layer. In particular, the relatively high contact stresses at tire edge ribs under\ud heavy aircraft loading cause significant shear stresses at the pavement near-surface. The\ud pavement responses under various loading conditions (aircraft type, wheel load, and\ud speed) were calculated, and the critical responses were identified. Good agreements were\ud achieved when the calculated pavement responses (vertical pressure and horizontal strain)\ud at various locations were compared to the measured responses from field instrumentation.\ud The model results show that partial debonding between asphalt layers causes much\ud greater tensile strains at the bottom of the whole asphalt layer

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“…However, in situ measurements for aircraft wheels demonstrate that vertical contact pressure at the tirepavement interface is nonuniformly distributed (5,6). The vertical contact stresses under the edge ribs of aircraft tires could be as high as 1.5 to 3 times the inflation pressure, depending on the load applied on the tire (7)(8)(9)(10).…”

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confidence: 99%

Airfield Flexible Pavement Responses under Heavy Aircraft and High Tire Pressure Loading

Wang

Garg

2015

Transportation Research Record: Journal of the Transportation R

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This paper investigates airfield flexible pavement responses under heavy aircraft and high tire pressure loading considering the realistic aircraft tire–pavement interaction. An advanced three-dimensional finite element model was developed; it characterized the hot-mix asphalt layer as a viscoelastic material and used implicit dynamic analysis to predict time-and temperature-dependent pavement responses under various loading conditions. The tire loadings were simulated as moving loads having uniform and nonuniform contact stress distributions. To illustrate the effect of moving load, stationary loading analysis was conducted with the equivalent modulus determined from the middepth pulse time under moving loading. Two temperature profiles were considered in the analysis, as compared with the constant temperature profile using the average temperature. The pavement responses in the asphalt layer (tensile, compressive, and shear strains) under different loading conditions were calculated and analyzed in terms of pavement failure mechanisms. The results emphasized the importance of considering nonuniform contact stresses and moving load in airfield pavement analysis. On the contrary, applying the average temperature profile in summer was a conservative approach for predicting fatigue cracking potential but underestimated rutting or near-surface cracking potential in the airfield pavement. The rut depths in the asphalt layer were predicted by using mechanistic–empirical performance models and compared with the measurements from the full-scale test. The results suggested that specific calibration parameters should be developed to provide accurate prediction of rut depth for airfield pavements.

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Aircraft Tire/Pavement Pressure Distribution

Cited by 12 publications

References 0 publications

Near Surface Pavement Response Using a Numerically Approximated Tire Contact Pressure From Inverse Analysis

Near Surface Pavement Response Using a Numerically Approximated Tire Contact Pressure From Inverse Analysis

Three-Dimensional Finite Element Modeling of Instrumented Airport Runway Pavement Responses

Airfield Flexible Pavement Responses under Heavy Aircraft and High Tire Pressure Loading

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