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Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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Ductile damage development in friction stir welded ...
Ductile damage development in friction stir welded ...

Ductile damage, development in a friction stir welded aluminum joint subjected to tension is analyzed numerically by FE-analysis, based on a total Lagrangian formulation. An elastic-viscoplastic constitutive relation that accounts for nucleation and growth of microvoids is applied.

Liberty Ship Failures | Metallurgy & Materials Engineering
Liberty Ship Failures | Metallurgy & Materials Engineering

25/12/2015, · The failure of many of the World War II Liberty ships is a well-known and dramatic example of the brittle fracture of steel that was thought to be ,ductile,. Some of the early ships experienced structural ,damage, when cracks developed in their decks and hulls.

(PDF) Ductile Damage Evolution Under Different Strain Rate ...
(PDF) Ductile Damage Evolution Under Different Strain Rate ...

An extensive scanning Failure of ductile metals is always controlled at electron microscopy analysis has been performed in order to microstructural level by the formation and growth of correlate damage effects with the microstructure morphological microcavities that nucleate from inclusions embedded in the modification as a function of the applied deformation rate. ductile matrix, also at high deformation rate.

Liberty Ship Failures | Metallurgy & Materials Engineering
Liberty Ship Failures | Metallurgy & Materials Engineering

25/12/2015, · The failure of many of the World War II Liberty ships is a well-known and dramatic example of the brittle fracture of steel that was thought to be ,ductile,. Some of the early ships experienced structural ,damage, when cracks developed in their decks and hulls.

Tenacity: Mineral Properties - The Mineral and Gemstone ...
Tenacity: Mineral Properties - The Mineral and Gemstone ...

Ductile, - A ,mineral, that can be stretched into a wire is ,ductile,. All true metals are ,ductile,. An example is Gold. Flexible but inelastic - Any ,mineral, that can be bent, but remains in the new position after it is bent is flexible but inelastic. If the term flexible is singularly used, it implies flexible but inelastic.

Tenacity: Mineral Properties - The Mineral and Gemstone ...
Tenacity: Mineral Properties - The Mineral and Gemstone ...

Ductile, - A ,mineral, that can be stretched into a wire is ,ductile,. All true metals are ,ductile,. An example is Gold. Flexible but inelastic - Any ,mineral, that can be bent, but remains in the new position after it is bent is flexible but inelastic. If the term flexible is singularly used, it implies flexible but inelastic.

Ductile damage modeling of the machining process
Ductile damage modeling of the machining process

compared with experiments. The damage model is shown to be able to capture the fracture response with the appropriate formulation of the damage driving energy including at least the inelastic part. Finally, the continuum progressive ductile damage model is applied in a rigid visco-plastic context for the simulation of the orthogonal machining process.

A STUDY OF THE INTERNAL PARAMETERS OF DUCTILE DAMAGE ...
A STUDY OF THE INTERNAL PARAMETERS OF DUCTILE DAMAGE ...

In this paper the Rousselier ductile damage model is used to simulate the softening behaviour of notched bars and crack growth in a pre‐cracked specimen of an A508 pressure vessel steel. The effect of the internal parameters needed to represent the damage on the calculated results is studied.

Liberty Ship Failures | Metallurgy & Materials Engineering
Liberty Ship Failures | Metallurgy & Materials Engineering

25/12/2015, · The failure of many of the World War II Liberty ships is a well-known and dramatic example of the brittle fracture of steel that was thought to be ,ductile,. Some of the early ships experienced structural ,damage, when cracks developed in their decks and hulls.

Effect of temperature in ductile damage models
Effect of temperature in ductile damage models

Ductile damage, is a process of metallic material ,damage, in conditions of monotonic loading. Evolution of the ,damage, follows plastic straining and ends by fracture of the component. Fig. 1 - Hypothetical fall of the top block in reactor shaft

(PDF) Ductile Damage Evolution Under Different Strain Rate ...
(PDF) Ductile Damage Evolution Under Different Strain Rate ...

Failure of ductile metals is always controlled at microstructural level by the formation and growth of microcavities that nucleate from inclusions embedded in the ductile matrix, also at high deformation rate. Many damage models have been proposed to. Skip to main content.

Ductile damage micromodeling by particles’ debonding in ...
Ductile damage micromodeling by particles’ debonding in ...

Ductile damage, is initiated by the matrix/particle interface debonding and the subsequent voids growth with plastic straining of the crystalline matrix. Homogenization techniques are used twice: first at mesoscale to derive the equivalent grain behaviour and then to …

Comparison of two uncoupled ductile damage initiation ...
Comparison of two uncoupled ductile damage initiation ...

28/7/2020, · In this paper, a simple uncoupled ,damage, approach, designed to be easy to use for engineers and accurate as well, is investigated. Two uncoupled ,damage, models, which consider the effect of the Lode angle and the hydrostatic pressure, combing three typical hardening rules, are selected and applied to the ,damage, prediction of DP900 dual-phase steel.

IDENTIFICATION OF DUCTILE DAMAGE PARAMETERS FOR …
IDENTIFICATION OF DUCTILE DAMAGE PARAMETERS FOR …

Ductile damage, is the process of metallic material ,damage, under conditions of monotonic loading. Evolution of the ,damage, follows plastic straining and ends by fracture of component. Problems of ,ductile damage, play significant role in industry, for example in optimization of technological processes,

Material Damage and Failure - iMechanica
Material Damage and Failure - iMechanica

Damage Initiation Criteria for Ductile Metals • Ductile criterion: –Appropriate for triggering damage due to nucleation, growth, and coalescence of voids –The model assumes that the equivalent plastic strain at the onset of damage is a function of stress triaxiality and strain rate. • Stress triaxiality η = − p / q

Ductile Damage Model Based On Void Growth Analysis for ...
Ductile Damage Model Based On Void Growth Analysis for ...

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Abaqus Takes on Cupid's Arrow Using Ductile Damage Feature
Abaqus Takes on Cupid's Arrow Using Ductile Damage Feature

For some background, the ductile damage method allows us to prescribe a reduction in both yield strength, Dσ, and elasticity, (1-D)E, as strain increases beyond a predefined threshold (see figure). Eventually, the element reaches zero load carrying capability and is …

the ductile damage - DASSAULT: ABAQUS FEA Solver - Eng-Tips
the ductile damage - DASSAULT: ABAQUS FEA Solver - Eng-Tips

If you specify multiple data sets for ,ductile damage, initiation criterion then Abaqus will assume that equivalent plastic strain at the onset of ,damage, depends on the stress triaxality, strain rate, and, in some cases, temperature. Make sure that the data from literature is defined correctly and that applied loads are enough to cause ,damage,.

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