Chapter

Strengths and Weaknesses of Long-term Village Studies: Insights from Longitudinal Research

February 2016

DOI:10.1093/acprof:oso/9780199461868.003.0004

In book: The Changing Village in India (pp.65-86)

Authors:

Shapan Adnan

SOAS, University of London

ResearchGate has not been able to resolve any citations for this publication.

ResearchGate has not been able to resolve any references for this publication.

Article

INFLUENCE OF RESIDUAL SHRINKAGE STRESSES ON THE ULTIMATE STRENGTHS OF STIFFENED STEEL FLANGES.

R. Narayanan

The effect of longitudinal shrinkage stresses set up during welding is discussed for aspect ratios commonly used in box girder construction. The changes in residual stresses and collapse loads by altering the type of welding are examined. An approximate method to predict the ultimate strengths of stiffened plates is suggested. The strengths computed are compared with the results of large-scale ... [Show full abstract] tests on axially loaded stiffened plates.

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Prediction of long-term whipping vibration stress due to slamming of large full ship in rough seas

April 1977 · International Shipbuilding Progress

Several characteristics of whipping vibration stress due to slamming impact in regular waves are referred to and the long-term predictions of whipping vibration and wave bending stresses are carried out for the large full ship of L equals 247 m, C//B equals 0. 824. The whipping vibration stress is as large as the wave bending stress in rough seas. This paper clarifies that the reasonable ... [Show full abstract] determination of allowable stress or safety factor for the longitudinal strength of ship body must contain the transient whipping vibration and springing stresses. Some theoretically predicted results are compared with the experimental results and a fairly good agreement can be seen between them.

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Flexural and Peel Properties of High Performance Magnesium/Carbon-Fiber/PEEK Laminated Composites

October 2004 · Key Engineering Materials

Mg/Carbon-Fiber/PEEK laminated composites were successfully fabricated through simple hot pressing. The flexural and peel properties of this Mg based laminated composites are examined and analyzed. The flexural stress and modulus along the longitudinal direction are 960 MPa and 54.6 GPa, respectively, suggesting a sufficiently high resistance against bending deflection. The peel strength is ... [Show full abstract] around 5 N/mm, superior to that of the epoxy-resin-adhered Al/CFRP laminated composites.

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Longitudinal strength of ships

September 1970 · International Shipbuilding Progress

G. Aertssen

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Two-body currents in inclusive electron scattering

May 1995 · Physical Review C

The longitudinal and transverse structure functions are calculated for inclusive electron scattering from 12C and 40Ca in the quasielastic and dip region. The microscopic model presented here incorporates two-body currents derived from one-pion exchange and intermediate Δ excitation. The reaction mechanism involves both one-nucleon and two-nucleon knockout processes. It is demonstrated that, even ... [Show full abstract] for quasielastic kinematics, two-body currents give a substantial contribution to the transverse structure function. Furthermore, the observed excess of transverse strength in the dip region between the quasielastic and delta peak can be partially ascribed to direct two-nucleon knockout following photoabsorption on a two-body current.

Article

Coalescence Criteria of Interacting Axial Cracks for Failure Assessments

January 2011 · Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

Masayuki Kamaya

In a structural integrity assessment of cracked pipes according to the fitness-for-service code, the influence of mechanical interaction between multiple cracks is considered by assuming coalescence of the interacting cracks. In this study, criteria of the coalescence were examined by finite element analyses for axial surface cracks located inside a pipe. Longitudinal semi-elliptical surface ... [Show full abstract] cracks were assumed to be on a straight pipe which was subjected to internal pressure. The changes in the stress intensity factor, J-integral value and limit load were investigated under various conditions. The intensity of the interaction depended not only on the relative position of the cracks but also on the pipe and crack geometries. Based on the analysis results, the coalescence criteria for assessing the failure strength of the cracked pipe were discussed. It was concluded that, for the stress intensity factor and J-integral value evaluations, the cracks should be treated as a combined crack when the offset distance H is less than 0.6a, where a is the crack depth. As for the limit load analyses, the criteria of S ≦ 3a and H ≦ 3a/2 were obtained. Furthermore, for limit load analyses, it was found that the surface length of the combined cracks could be assumed to be equal to the sum of their lengths. The ligament length (distance between the cracks) was not necessary to be included in the surface length of combined crack.

Article

State of stress and strain of a multilayered composite flexible pipe reinforced by helical carcass

November 1988 · Mechanics of Composite Materials

The model of a composite flexible pipe reinforced by a helical carcass, suggested in the present article, makes it possible to reduce the problem of calculating its strength and rigidity to the calculation of a multilayered anisotropic shell. It was established that when the flexible pipe is exposed to internal pressure and axial load, two states of equilibrium in regard to untwisting of the pipe ... [Show full abstract] are possible, and they are attained with different combinations of the winding angles of the reinforcing elements in the longitudinally bearing layers. The characteristics of strength and rigidity of a flexible pipe depend in different ways on the winding angles of the reinforcing elements. An analysis of these dependences makes it possible to choose rational winding angles in combination with the specified requirements that the parameters of strength and rigidity of the newly devised pipes have to satisfy.

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Armiranobetonski elementi od betona visokih čvrstoća naprezani savijanjem

Current knowledge about the properties, technology and structure of high strength concrete is presented. Significant parameters needed in the analysis of load-bearing, ductile and acceptable reinforced-concrete elements made of such concrete and subjected to bending, with longitudinal force or without this force, are considered. These parameters are: design compressive stress diagram, ductility, ... [Show full abstract] deflection, and crack width restraint. The results are compared with values for normal strength concrete. The use of high strength concrete is recommended.

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On the Adequacy of the Longitudinal Strength Calculation

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S. R. HELLER

Article

Relativistic Mean Field Theory and Spin Excitations

October 2000

Hiroshi Toki

We study the spin excitations of nuclei in the relativistic mean field (RMF) theory. In particular, we discuss the Gamow-Teller strengths and the longitudinal and transverse spin responses, the experimental data of which were taken by the Tokyo group at RCNP. The relativistic description of spin excitations does change largely our picture on the spin correlations in nuclei.

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Experimental study on shear behavior of high strength reinforced reactive powder concrete beam

August 2013

Using a test system is stable and reliable, change the test beam shear span ratio, stirrup ratio and longitudinal reinforcement ratio and the factors such as the steel grade, for 6 different high strength reinforced reactive powder concrete simply supported beam experiment. Results show that the HRB500 level such as high strength steel with active powder concrete has good shearing performance, ... [Show full abstract] good shear bearing capacity and the shear ductility. For the shear span ratio (1<λ≤3) certain of beam, the appropriate configuration stirrups can improve the bearing capacity, improve the shear ductility. Reinforcement ratio, ratio and shear span ratio of longitudinal reinforcement and depth of the test parameters, such as the shear bearing capacity and the shear ductility of the beam influence significantly, stirrup ratio is higher, the higher bearing capacity, the better shear ductility; The higher the ratio of longitudinal reinforcement and depth, the higher bearing capacity, but the lower the shear ductility. The higher the shear span ratio, shear ductility, the better, but the lower bearing capacity.

Article

Full-text available

A calculation method of cracking moment for the high strength concrete beams under pure torsion

February 2011 · Sadhana

In this study, a method is given to calculate cracking moments of high strength reinforced concrete beams under the effect of pure torsion. To determine the method, both elastic and plastic theories were used. In this method, dimensions of beam cross-section were considered besides stirrup and longitudinal reinforcements. Two plain high strength concrete (without reinforcement) and eight high ... [Show full abstract] strength reinforced concrete beams which have two different cross-sections (150 × 250mm and 150 × 300mm) were produced to examine the validity of the proposed method. The predictions of the proposed approach for the calculation of the cracking moment of beams under pure torsion were compared with the experimental and the analytical results of previous studies. From these comparisons it is concluded that the predictions of the proposed equations for the cracking moment of plain and reinforced high strength concrete beams under pure torsion are closer to the experimental data compared to the analytical results of previous theories. Keywords.High strength concrete beam; pure torsion; torsional cracking; torsional moment; reinforced concrete; cracking moment.

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