Application of the strain energy to estimate the rock load in squeezing ground condition of Eamzade Hashem tunnel in Iran

The wustite-spinel interface can be viewed as a model interface because the wustite and spinel can share a common f.c.c. oxygen sublattice such that only the cations distribution changes on crossing the interface. In this study, the interface has been formed by a solid state reaction involving either external or internal oxidation. In systems with very small lattice misfit, very large particles (>lμm) with coherent interfaces have been observed. Previously, the wustite-spinel interface had been observed to facet on {111} planes for MgFe2C4 and along {100} planes for MgAl2C4 and MgCr2O4, the spinel then grows preferentially in the <001> direction. Reasons for these experimental observations have been discussed by Henriksen and Kingery by considering the strain energy. The point-defect chemistry of such solid state reactions has been examined by Schmalzried. Although MgO has been the principal matrix material examined, others such as NiO have also been studied.

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Modeling of Strain Energy Harvesting in Pneumatic Tires Using Piezoelectric Transducer

Tire Science and Technology ◽

10.2346/tire.14.420102 ◽

2014 ◽

Vol 42 (1) ◽

pp. 16-34 ◽

Cited By ~ 5

Author(s):

Ali E. Kubba ◽

Mohammad Behroozi ◽

Oluremi A. Olatunbosun ◽

Carl Anthony ◽

Kyle Jiang

Keyword(s):

Energy Harvesting ◽

Strain Energy ◽

Fiber Composite ◽

Experimental Tests ◽

Evaluation Study ◽

Monitoring Systems ◽

Monitoring Device ◽

Optimum Location ◽

Piezoelectric Fiber Composite ◽

Piezoelectric Fiber

ABSTRACT This paper presents an evaluation study of the feasibility of harvesting energy from rolling tire deformation and using it to supply a tire monitoring device installed within the tire cavity. The developed technique is simulated by using a flexible piezoelectric fiber composite transducer (PFC) adhered onto the tire inner liner acting as the energy harvesting element for tire monitoring systems. The PFC element generates electric charge when strain is applied to it. Tire cyclic deformation, particularly at the contact patch surface due to rolling conditions, can be exploited to harvest energy. Finite element simulations, using Abaqus package, were employed to estimate the available strain energy within the tire structure in order to select the optimum location for the PFC element. Experimental tests were carried out by using an evaluation kit for the energy harvesting element installed within the tire cavity to examine the PFC performance under controlled speed and loading conditions.

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Stress Analysis of a Tire Under Vertical Load by a Finite Element Method

Tire Science and Technology ◽

10.2346/1.2167231 ◽

1977 ◽

Vol 5 (2) ◽

pp. 102-118 ◽

Cited By ~ 28

Author(s):

H. Kaga ◽

K. Okamoto ◽

Y. Tozawa

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Computer Program ◽

Temperature Rise ◽

Strain Energy ◽

Internal Stresses ◽

Vertical Load ◽

The Finite Element Method ◽

Internal Temperature ◽

Element Method

Abstract An analysis by the finite element method and a related computer program is presented for an axisymmetric solid under asymmetric loads. Calculations are carried out on displacements and internal stresses and strains of a radial tire loaded on a road wheel of 600-mm diameter, a road wheel of 1707-mm diameter, and a flat plate. Agreement between calculated and experimental displacements and cord forces is quite satisfactory. The principal shear strain concentrates at the belt edge, and the strain energy increases with decreasing drum diameter. Tire temperature measurements show that the strain energy in the tire is closely related to the internal temperature rise.

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Mechanical power and hyperelasticity

10.1093/oso/9780198567783.003.0003 ◽

2017 ◽

Author(s):

David J. Steigmann

Keyword(s):

Energy Function ◽

Strain Energy ◽

Strain Energy Function ◽

Mechanical Power ◽

Elastic Materials ◽

Cyclic Motion

This chapter covers the notion of hyperelasticity—the concept that stress is derived from a strain—energy function–by invoking an analogy between elastic materials and springs. Alternatively, it can be derived by invoking a work inequality; the notion that work is required to effect a cyclic motion of the material.

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