– having regard to the Commission proposal to Parliament and the Council ( COM(2018)0340), (Ordinary legislative procedure: first reading)
OPINION of the Committee on Agriculture and Rural DevelopmentįINAL VOTE BY ROLL CALL IN COMMITTEE RESPONSIBLE OPINION of the Committee on Industry, Research and Energy OPINION of the Committee on Economic and Monetary Affairs (COM(2018)0340 – C8-0218/2018 – 2018/0172(COD))Ĭommittee on the Environment, Public Health and Food SafetyĭRAFT EUROPEAN PARLIAMENT LEGISLATIVE RESOLUTIONĪNNEX: LIST OF ENTITIES OR PERSONSFROM WHOM THE RAPPORTEUR HAS RECEIVED INPUT
The model is finally validated against experimental results from the literature consisting of three-point bending tests performed on mortar samples previously exposed to an aggressive solution for different time periods.On the proposal for a directive of the European Parliament and of the Council on the reduction of the impact of certain plastic products on the environment After a detailed discussion of the formulation, the main characteristics of the proposed law are illustrated with a number of academic examples for different combinations of mechanical loading and chemical degradation sequences. The softening of the cracking surface is governed by two history variables: an internal variable that accounts for the dissipated fracturing (plastic) work, and an external variable to be provided by a chemical degradation model that accounts for the effect of chemical degradation on the strength parameters. A hyperbolic cracking (plastification) surface in the stress state determines the crack initiation. The law is defined in terms of the normal and shear stresses on the average plane of the crack and the corresponding normal and shear relative displacements. Along this line, this paper presents the extension of an existing constitutive law of this kind to include the effect of chemical degradation of the material in the formation of fractures. In particular, interface elements equipped with elastoplastic constitutive laws that account for the softening of the material strength parameters due to the fracturing mechanical work has been proved to accurately reproduce observed fracture propagation behaviour in concrete. In the framework of the Finite Element Method, zero-thickness interface elements have been widely used to model fracturing processes in quasi-brittle materials in a broad variety of problems.
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