Mechanical Behavior and Damage of Zinc Coating for Hot Dip Galvanized Steel Sheet DP600
Advanced high strength galvanized steel sheet has been one of the dominant materials of modern automotive panels because of its outstanding mechanical properties and corrosion resistance. The zinc coating thickness of hot dip galvanized steel sheet is only about 10−20 μm, which is...
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2020-02-01
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doaj-2a009e940bf449db8866d5437d90a89a2020-11-25T02:56:04ZengMDPI AGCoatings2079-64122020-02-0110320210.3390/coatings10030202coatings10030202Mechanical Behavior and Damage of Zinc Coating for Hot Dip Galvanized Steel Sheet DP600Gui Li0Xiaoyu Long1Key Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, ChinaKey Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, ChinaAdvanced high strength galvanized steel sheet has been one of the dominant materials of modern automotive panels because of its outstanding mechanical properties and corrosion resistance. The zinc coating thickness of hot dip galvanized steel sheet is only about 10−20 μm, which is a discarded object on the macro level. However, it is obvious to damage and impact on stamping performance. Therefore, this paper takes zinc coating as the research object and builds its mechanical constitutive model based on a nano-indentation test and dimensional analysis theory. We separated the zinc coating from the galvanized steel substrate and constructed a sandwich material model by introducing a cohesive layer to connect the zinc coating and the steel substrate. We obtained the interface binding energy between the zinc coating and the steel substrate through the nano-scratch test. The accuracy of the model is verified by the finite element analysis of hemispherical parts. We used the five-layers element model with 0 thickness cohesive layer to simulate the zinc coating damage of galvanized steel sheet. The hemispherical part drawing experiment is used to verify the feasibility of the finite element analysis results. The results demonstrate that it is more accurate to consider the finite element numerical simulation of the zinc coating, introducing the cohesive element to simulate damage between the coating and the substrate. Drawing depth, stamping force, and the strain of the numerical simulation are closer to the experimental results.https://www.mdpi.com/2079-6412/10/3/202hot dip galvanized steel sheetzinc coatingmechanical behaviordamagecohesive element |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gui Li Xiaoyu Long |
spellingShingle |
Gui Li Xiaoyu Long Mechanical Behavior and Damage of Zinc Coating for Hot Dip Galvanized Steel Sheet DP600 Coatings hot dip galvanized steel sheet zinc coating mechanical behavior damage cohesive element |
author_facet |
Gui Li Xiaoyu Long |
author_sort |
Gui Li |
title |
Mechanical Behavior and Damage of Zinc Coating for Hot Dip Galvanized Steel Sheet DP600 |
title_short |
Mechanical Behavior and Damage of Zinc Coating for Hot Dip Galvanized Steel Sheet DP600 |
title_full |
Mechanical Behavior and Damage of Zinc Coating for Hot Dip Galvanized Steel Sheet DP600 |
title_fullStr |
Mechanical Behavior and Damage of Zinc Coating for Hot Dip Galvanized Steel Sheet DP600 |
title_full_unstemmed |
Mechanical Behavior and Damage of Zinc Coating for Hot Dip Galvanized Steel Sheet DP600 |
title_sort |
mechanical behavior and damage of zinc coating for hot dip galvanized steel sheet dp600 |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2020-02-01 |
description |
Advanced high strength galvanized steel sheet has been one of the dominant materials of modern automotive panels because of its outstanding mechanical properties and corrosion resistance. The zinc coating thickness of hot dip galvanized steel sheet is only about 10−20 μm, which is a discarded object on the macro level. However, it is obvious to damage and impact on stamping performance. Therefore, this paper takes zinc coating as the research object and builds its mechanical constitutive model based on a nano-indentation test and dimensional analysis theory. We separated the zinc coating from the galvanized steel substrate and constructed a sandwich material model by introducing a cohesive layer to connect the zinc coating and the steel substrate. We obtained the interface binding energy between the zinc coating and the steel substrate through the nano-scratch test. The accuracy of the model is verified by the finite element analysis of hemispherical parts. We used the five-layers element model with 0 thickness cohesive layer to simulate the zinc coating damage of galvanized steel sheet. The hemispherical part drawing experiment is used to verify the feasibility of the finite element analysis results. The results demonstrate that it is more accurate to consider the finite element numerical simulation of the zinc coating, introducing the cohesive element to simulate damage between the coating and the substrate. Drawing depth, stamping force, and the strain of the numerical simulation are closer to the experimental results. |
topic |
hot dip galvanized steel sheet zinc coating mechanical behavior damage cohesive element |
url |
https://www.mdpi.com/2079-6412/10/3/202 |
work_keys_str_mv |
AT guili mechanicalbehavioranddamageofzinccoatingforhotdipgalvanizedsteelsheetdp600 AT xiaoyulong mechanicalbehavioranddamageofzinccoatingforhotdipgalvanizedsteelsheetdp600 |
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