Load Bearing and Mass Relation Contrast between Composite Shell and Alloy Shell

To improve work efficiency of cabin and solve the contradiction between load bearing and mass, combining parametric modeling and optimization theory,the influence curves of load bearing on mass are proposed. Applying stress state theory, combining distortion energy theory criterion and Tsai-Wu failure criterion, shells load bearing is theoretically analysed. Contrast results are, in the same load condition, compared with alloy, the weight of composite reduces 46.2%;in the same weight condition, the load bearing of composite increases 75%. At present, the cabin load bearing is 0.04MPa, to improve work efficiency, increasing to 0.055MPa and replacing alloy by composite, the load bearing increases 37.5%, while the weight reduces 26.1%, then the contradiction between work efficiency and mass is coordinated.

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J1810105 Evaluation Method of Residual Load Bearing Capacity for Escalator Truss Structure under Compressive Load Condition

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2014._j1810105- ◽

2014 ◽

Vol 2014 (0) ◽

pp. _J1810105--_J1810105-

Author(s):

Keisuke MORI ◽

Yutaka HASHIOKA ◽

Masahiko NAWATA ◽

Takanori YOKOI ◽

Kazutoshi AKAZAWA

Keyword(s):

Bearing Capacity ◽

Evaluation Method ◽

Compressive Load ◽

Load Condition ◽

Truss Structure ◽

Load Bearing Capacity ◽

Load Bearing

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The Study of Post-Fire Load Bearing Capacity of Steel Column under Axial Compression Exposure to one-Side Fire

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.284-286.330 ◽

2011 ◽

Vol 284-286 ◽

pp. 330-334

Author(s):

Jian Feng Chen ◽

Tian Hua Zhou ◽

Lin Feng Lu ◽

Han Heng Wu

Keyword(s):

Bearing Capacity ◽

Axial Compression ◽

Load Condition ◽

Heterogeneous Material ◽

Material Strength ◽

Fire Load ◽

Load Bearing Capacity ◽

Load Bearing ◽

Steel Column ◽

Uniform Temperature Field

The section of steel column under axial compression presents heterogeneous material and its load condition changes after experiencing fire damage of one side. Taking H-section steel column under axial compression commonly used in engineering for study object in this thesis in order to study post-fire residual load bearing capacity, the post-fire eccentric effect of steel column under axial compression exposure to one-side fire is analyzed using the method of equivalent section which considering the change of the material strength after high temperature, the influence of non-uniform temperature field on material properties and the stiffness degradation of member section. Calculation methods of the eccentricity and additional moment are proposed and further given a formula of residual load bearing capacity.

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A Reconciliation of Local and Global Models for Bone Remodeling Through Optimization Theory

Journal of Biomechanical Engineering ◽

10.1115/1.429633 ◽

1999 ◽

Vol 122 (1) ◽

pp. 72-76 ◽

Cited By ~ 6

Author(s):

G. Subbarayan ◽

D. L. Bartel

Keyword(s):

Optimization Theory ◽

Optimality Criteria ◽

Bone Architecture ◽

Necessary Condition ◽

Local Error ◽

Mathematical Form ◽

Global Models ◽

Load Bearing ◽

Global Criterion ◽

The Cost

Remodeling rules with either a global or a local mathematical form have been proposed for load-bearing bones in the literature. In the local models, the bone architecture (shape, density) is related to the strains/energies sensed at any point in the bone, while in the global models, a criterion believed to be applicable to the whole bone is used. In the present paper, a local remodeling rule with a strain “error” form is derived as the necessary condition for the optimum of a global remodeling criterion, suggesting that many of the local error-driven remodeling rules may have corresponding global optimization-based criteria. The global criterion proposed in the present study is a trade-off between the cost of metabolic growth and use, mathematically represented by the mass, and the cost of failure, mathematically represented by the total strain energy. The proposed global criterion is shown to be related to the optimality criteria methods of structural optimization by the equivalence of the model solution and the fully stressed solution for statically determinate structures. In related work, the global criterion is applied to simulate the strength recovery in bones with screw holes left behind after removal of fracture fixation plates. The results predicted by the model are shown to be in good agreement with experimental results, leading to the conclusion that load-bearing bones are structures with optimal shape and property for their function. [S0148-0731(00)00601-4]

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Fracture Mechanics Characterization of Composite/Metal Interfaces of Bonded Joints

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.334-335.361 ◽

2007 ◽

Vol 334-335 ◽

pp. 361-364

Author(s):

Won Seok Kim ◽

Jung Ju Lee

Keyword(s):

Adhesive Bonding ◽

Load Condition ◽

Tensile Load ◽

Structural Features ◽

Lap Joints ◽

Bonded Joints ◽

Singular Stress ◽

Engineering Structures ◽

Load Bearing ◽

Adhesive Bonded Joints

Adhesive bonding between different materials has been widely used for a large variety of applications, such as in the aircraft, automotive, and many other civil engineering structures. Adhesive-bonded joints as load bearing components have the potential to save significant weight and cost over conventional riveted or bolted joints. For the last ten years a major problem in adhesive technology has been the difficulty in predicting the accurate load bearing capacity of a joint. This difficulty comes from the fact that the stress distribution in the adhesive joint is very complex and singular stress field exists at the bi-material corner. And for bonded joints, the failure usually occurs at the adhesive/adherend interface. Therefore another difficulty comes from the complex interfacial failure analysis due to the formation of chemical bonds, whose strengths are difficult to measure. Many studies have been conducted to investigate the effects of bond thickness, material properties of adhesives and adherends, and geometric shape of bi-material corner tip to the fracture behavior of bonded joints. In this paper, we analyze the stress fields at the interface corner of composite/steel(anisotropic/isotropic) double lap joint to predict failure by using stress intensity based fracture criterion. And analytical results are compared with experimental results of co-cured lap joints under tensile load condition. Micro-structural features, hardness characteristics, and fracture toughness determinations of the interfaces are also conducted.

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Analysis of One Bay Residential Building with Combined RCC Frame and Load Bearing Wall Structures

Journal of the Institute of Engineering ◽

10.3126/jie.v13i1.20356 ◽

2018 ◽

Vol 13 (1) ◽

pp. 117-124

Author(s):

Rajib Maharjan ◽

Vivek Shrestha

Keyword(s):

Cost Minimization ◽

Load Condition ◽

Hybrid Structure ◽

Frame Structure ◽

Variable Load ◽

Actual Behavior ◽

Structural Components ◽

Major Purpose ◽

Load Bearing ◽

Transfer Pattern

The major purpose of this study is to justify construction method of a hybrid structure in core area with construction complexity due unsafe excavation conditions and tries to define its rigidity and strength. Both RCC and Frame structure transfer same load to ground through foundation but the transfer mechanism varies. In some practical condition, building construction should be carried out in compact areas with unsafe adjoining building where adequate excavation for foundation cannot be carried out. In such cases, one bay hybrid structure is proposed for construction with combined RCC frame structure and load bearing walls. In these combined cases, both structures works as same unit to transfer building load but the transfer pattern varies. The variable load transfer pattern is due to discontinuity in structural system which also effect on seismic response of the building. The placement of a masonry load bearing structure in RCC frame structure varies design of all structural components of the building. To study actual behavior of hybrid structure in various load condition and introducing cost minimization techniques of buildings structural analysis was carried using ETABS 2016 with composite structural arrangement and with induction of load bearing wall as structural component. By which seismic behavior of building in both cases was obtained as well as reduction in rebar percentage and dimensional reduction of structural components can be achieved.Journal of the Institute of Engineering, 2017, 13(1): 117-124

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Load-Bearing in the Ovine Medial Tibial Condyle: Effect of Meniscectomy

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0038-1633027 ◽

1993 ◽

Vol 06 (02) ◽

pp. 100-104 ◽

Cited By ~ 8

Author(s):

D. M. Pickles ◽

C. R. Bellenger

Keyword(s):

Knee Joint ◽

Contact Area ◽

Mammalian Species ◽

Total Removal ◽

Load Bearing ◽

Human Knee ◽

Biochemical Effects ◽

Pressure Sensitive ◽

Medial Meniscectomy ◽

Tibial Condyle

SummaryTotal removal of a knee joint meniscus is followed by osteoarthritis in many mammalian species. Altered load-bearing has been observed in the human knee following meniscectomy but less is known about biochemical effects of meniscectomy in other species. Using pressure sensitive paper in sheep knee (stifle) joints it was found that, for comparable loads, the load-bearing area on the medial tibial condyle was significantly reduced following medial meniscectomy. Also, for loads of between 50 N and 500 N applied to the whole joint, the slope of the regression of contact area against load was much smaller. Following medial meniscectomy, the ability to increase contact area as load increased was markedly reduced.The load bearing area on the medial tibial condyle was reduced following meniscectomy.

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Effect of No-load and Load Condition on Transformer Sound

International Journal of Scientific Research in Science Engineering and Technology ◽

10.32628/ijsrset184113 ◽

2018 ◽

pp. 11-15

Author(s):

Dr. Hitesh Paghadar

Keyword(s):

Experimental Study ◽

Power Transformer ◽

Load Condition ◽

Noise Pollution ◽

Sound Level ◽

Measurement Scale ◽

Dominant Factor ◽

Public Attention ◽

Level Measurement ◽

Human Ear

Increasing environment noise pollution is a matter of great concern and of late has been attracting public attention. Sound produces the minute oscillatory changes in air pressure and is audible to the human ear when in the frequency range of 20Hz to 20 kHz. The chief sources of audible sound are the magnetic circuit of transformer which produces sound due to magnetostriction phenomenon, vibration of windings, tank and other structural parts, and the noise produced by cooling equipments. This paper presents the validation for sound level measurement scale, why A-weighted scale is accepted for sound level measurement, experimental study carried out on 10MVA Power Transformer. Also presents the outcomes of comparison between No-Load sound & Load sound level measurement, experimental study carried out on different transformer like - 10MVA, 50MVA, 100MVA Power Transformer, to define the dominant factor of transformer sound generation.

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