Experimental and numerical study of standard impact tests on polypropylene pipes with brittle behaviour

Domaneschi, Marco

doi:10.1177/0954405412461983

Cited by 30 publications

(12 citation statements)

References 19 publications

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“…These results can be considered suitable, as these differences were caused by many variables [ 47 , 48 , 49 ], as well as the results of interpolation of m -layer foam.…”

Section: Discussionmentioning

confidence: 99%

Prompt Determination of the Mechanical Properties of Industrial Polypropylene Sandwich Pipes

et al. 2021

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A simple and prompt method to determine the mechanical properties of industrial multilayer extrusion polypropylene pipes for a gravity sewer network is suggested. The engineering formulas included for calculating the permissible thickness and relative position of a foam core in the pipes are based on a linear-elastic approximation and the rule of mixtures. The applicability of the approximation was justified experimentally during investigation of the effective tensile characteristics of single- and multilayer pipes and each layer specimen by using traditional tests and finite-element calculations. The results obtained were used to formulate engineering recommendations for calculations of this type.

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“…These results can be considered suitable, as these differences were caused by many variables [ 47 , 48 , 49 ], as well as the results of interpolation of m -layer foam.…”

Section: Discussionmentioning

confidence: 99%

Prompt Determination of the Mechanical Properties of Industrial Polypropylene Sandwich Pipes

et al. 2021

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“…It thus differs from numerical models of fracture propagation in a continuum unaffected by pre-existing discontinuities [e.g. Domaneschi, 2012], or smeared crack formulations based on equivalent continuum models of the dam and rock mass [e.g. Hariri-Ardebili, 2014].…”

Section: Fundaments Of the Discrete Element Methods (Dem) Modelmentioning

confidence: 99%

Seismic Analysis of Masonry Gravity Dams Using the Discrete Element Method: Implementation and Application

Bretas

Lemos

Lourénço

2015

Journal of Earthquake Engineering

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Much research in recent years has focused on the seismic analysis of concrete and earthfill dams, and few works have addressed the case of masonry dams. The structural behaviour of masonry dams is controlled essentially by its discontinuous nature, which may induce significant non-linear response during an intense earthquake. In this paper a numerical tool based on the Discrete Element Method is presented, aimed at the static, dynamic and hydromechanical analysis of masonry gravity dams. The use of discontinuous models is mandatory for the study of failure mechanisms involving the masonry discontinuities, the dam-rock interface or the rock mass joints. The Discrete Element Method is able to assemble continuous and discontinuous meshes simultaneously in the same model, providing a versatile tool to consider various assumptions and levels of analysis, ranging from simplified to detailed structural representations. A comprehensive study of the seismic behaviour of Lagoa Comprida Dam, located in Portugal, is presented. Both continuous and discontinuous models were developed to assess the main failure mechanisms, including overstress, partial and global sliding and overturning.

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“…The mesh refinement is taken into particular consideration in the specific area where the crack propagates. 15 In order to conserve computer resource and improve computational speed, the model was meshed into a hexahedral meshwork using the transition sub-network method. Literature showed that an element size equal to 0.05 mm yields optimum results.…”

Section: Finite Element Modeling Of Con-rod Fsmentioning

confidence: 99%

Analysis on technology and defects of fracture splitting of automobile engine connecting rod

Yang

Kou

Gao

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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The principle of connecting rod (con-rod) fracture splitting was analyzed, and the microscopic morphology of fracture surface was observed using scanning electron microscope. Crack initiation and propagation during the fracture splitting of con-rod process was numerically simulated. The effects of the bolt hole on the fracture splitting force and distribution of stress and strain were investigated. Typical location of fracture splitting defects and why they were generated were analyzed, and methods were proposed to avoid them. The results show that the nature of con-rod fracture splitting is a mode I quasi-brittle fracture, and the position of crack initiation can be found during the analysis process. Existence of the bolt hole is helpful to optimize fracture splitting technology and improve product quality, and the optimized range of bolt hole position was achieved based on simulation result. Moreover, defects such as steps, break-outs, usually occur between the bolt hole wall and outer edge of the con-rod big end in that two cracks converged and propagation velocity was slow in this region. The fracture splitting defects can be reduced or avoided when the outer shape of the fracture surface is a circular arc.

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Experimental and numerical study of standard impact tests on polypropylene pipes with brittle behaviour

Cited by 30 publications

References 19 publications

Prompt Determination of the Mechanical Properties of Industrial Polypropylene Sandwich Pipes

Prompt Determination of the Mechanical Properties of Industrial Polypropylene Sandwich Pipes

Seismic Analysis of Masonry Gravity Dams Using the Discrete Element Method: Implementation and Application

Analysis on technology and defects of fracture splitting of automobile engine connecting rod

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