Improvement of fracture characterisation of high-strength steel sheet metals by means of coupling of optical strain analysis systems with acoustic emission techniques

通过光学应变分析系统与声发射技术的耦合改进高强度钢板的断裂表征

基本信息

项目摘要

High-strength steels play an important role in the automotive industry. Simulation-based design of forming processes can help utilise their high potential. This requires an accurate description of the material formability. For that, forming limit curves are usually used. However, the prediction quality of forming limit curves for high-strength steels not always suffice. Alternatively, fracture initiation models, which consider the stress state, can be used for fracture prediction in the FEA of sheet metal forming. With the help of an optical measurement system for determination of local deformations and numerical simulations for identification of the stress state at the location of crack initiation, it is possible to obtain fracture strains via testing of specimens of different geometries. Resent results show, however, that many specimens which are currently used for characterisation of the fracture behaviour of high-strength sheet materials, exhibit critical damage and crack initiation first in the specimen interior. Depending on the further strain localisation, damage accumulation rate, and fracture resistance of the material, the material failure reaches the specimen surface more or less delayed, where it can be detected by the optical measurement system.The main objective of the project is to develop a method, which enables in-time detection of critical damage accumulation rate and crack initiation for the fracture characterisation of high-strength steel sheet metals by means of acoustic emission technology coupled with imaging techniques. With the help of the coupled measuring systems, critical strains, which lead to a critical damage accumulation rate or crack initiation in the specimen interior and, as a results, go along with a release of energy stored in elastic deformation, are to be accurately detected and recorded. For many specimens and test arrangements, it should be possible to detect material fracture earlier than with an optical measurement system only, which can only detect cracks of a sufficient size on the specimen surface. Via a more accurate determination of the time point of the critical damage accumulation rate or fracture inside the specimen, which is invisible for optical measurement systems, the accuracy of the material failure characterisation should be improved. This should lead to an increase of the quality of the simulation-based design of forming processes with high-strength steels and allow a better material utilisation and higher manufacturing process stability. Moreover, new insights regarding material damage on the microstructure level are expected to be gained during the project, which can provide a basis for a further development or optimisation of high-strength sheet steels.
高强度钢在汽车工业中发挥着重要作用。基于仿真的成形工艺设计可以帮助利用其巨大潜力。这就需要对材料的可成形性进行准确的描述。为此,通常使用成形极限曲线。然而,高强度钢的成形极限曲线的预测质量并不总是足够的。另外,考虑应力状态的断裂起始模型可用于金属板成形的有限元分析中的断裂预测。借助用于确定局部变形的光学测量系统和用于识别裂纹萌生位置处的应力状态的数值模拟,可以通过测试不同几何形状的试样来获得断裂应变。然而,最近的结果表明,目前用于表征高强度板材断裂行为的许多试样,表现出临界损伤和裂纹萌生首先在试样内部。取决于材料的进一步应变局部化、损伤累积速率和抗断裂性,材料失效或多或少延迟到达试样表面,在那里可以通过光学测量系统检测到。该项目的主要目标是开发一种方法,这使得能够及时检测临界损伤累积速率和裂纹萌生,用于高强度材料的断裂表征,通过声发射技术结合成像技术对钢板金属进行强化。借助耦合的测量系统,可以精确地检测和记录临界应变,该临界应变导致试样内部的临界损伤累积速率或裂纹萌生,并因此沿着以弹性变形形式存储的能量的释放。对于许多试样和试验布置,应该能够比仅使用光学测量系统更早地检测材料断裂,光学测量系统只能检测试样表面上足够尺寸的裂纹。通过更准确地确定试样内部的临界损伤累积速率或断裂的时间点,这对于光学测量系统是不可见的,材料失效表征的准确性应该得到提高。这将提高高强度钢成形工艺的模拟设计质量,并实现更好的材料利用率和更高的制造工艺稳定性。此外,预计在项目期间将获得有关微观结构水平上材料损伤的新见解,这可以为进一步开发或优化高强度钢板提供基础。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Professor Dr.-Ing. Bernd-Arno Behrens其他文献

Professor Dr.-Ing. Bernd-Arno Behrens的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Professor Dr.-Ing. Bernd-Arno Behrens', 18)}}的其他基金

Surface layer treatment using martensite formation of formed stainless steel
利用成形不锈钢的马氏体形成进行表面层处理
  • 批准号:
    423160066
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Characterization of the application behavior of self-lubricating powder pressing tools
自润滑粉末压制工具的应用行为表征
  • 批准号:
    403432892
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Dry lubrication of rolling contacts by self-regenerating molybdenum-oxide coatings
通过自再生氧化钼涂层对滚动接触进行干润滑
  • 批准号:
    407673224
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Improved Fracture Characterization of High Strength Steels due to a new Test Method for Shear Tension Specimen on uniaxial Tensile Testing Machines
单轴拉伸试验机上剪切拉伸试样的新测试方法改善了高强度钢的断裂表征
  • 批准号:
    405334714
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Investigations of gradient-dependent nitrided forging tools in hot bulk metal forming under cyclic thermomechanical loading
循环热机械载荷下热块状金属成形中梯度相关氮化锻造工具的研究
  • 批准号:
    397768783
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Influence of cooling of forging dies on the process-related microstructural changes in the surface zone and their effect on wear behaviour
锻模冷却对表面区域与工艺相关的微观结构变化的影响及其对磨损行为的影响
  • 批准号:
    349885770
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Determination of forming limits of the martensitic chromium steels in hot forming processes
马氏体铬钢热成形过程成形极限的测定
  • 批准号:
    385989694
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants (Transfer Project)
Production of areas with reduced strength in press-hardened components by means of a tempering station
通过回火站生产模压硬化部件中强度降低的区域
  • 批准号:
    313453754
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants (Transfer Project)
Studies on the preforming of steel in semi-hot temperature range with modified carbon-based coating systems
改性碳基涂层体系半热态钢预成型研究
  • 批准号:
    356851715
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Improvement and identification of mechanical properties in forged parts by immediate post-forming after hot forging on different temperature levels by influencing microstructure of tempering steel
通过影响回火钢的显微组织,在不同温度水平下热锻后立即后成形来改善和鉴定锻件的机械性能
  • 批准号:
    359921546
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants

相似国自然基金

页岩超临界CO2压裂分形破裂机理与分形离散裂隙网络研究
  • 批准号:
  • 批准年份:
    2020
  • 资助金额:
    0.0 万元
  • 项目类别:
    省市级项目
疲劳荷载作用下沥青路面粘结层力学响应特性及破坏机理研究
  • 批准号:
    51308060
  • 批准年份:
    2013
  • 资助金额:
    25.0 万元
  • 项目类别:
    青年科学基金项目
结合软印刷技术的复合材料新型层间结构架构
  • 批准号:
    51103142
  • 批准年份:
    2011
  • 资助金额:
    25.0 万元
  • 项目类别:
    青年科学基金项目

相似海外基金

I-Corps: Translation Potential of Mechanically Compliant Fracture Fixation Plates for Long Bone Fractures
I-Corps:用于长骨骨折的机械顺应性骨折固定板的平移潜力
  • 批准号:
    2410029
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Model order reduction for fast phase-field fracture simulations
快速相场断裂模拟的模型降阶
  • 批准号:
    EP/Y002474/1
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Research Grant
CAREER: Creating Tough, Sustainable Materials Using Fracture Size-Effects and Architecture
职业:利用断裂尺寸效应和架构创造坚韧、可持续的材料
  • 批准号:
    2339197
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Understanding Dike Propagation Through Comparison of High-fidelity Coupled Fracture and Fluid Flow Models and Field Observations
通过比较高保真耦合裂缝和流体流动模型以及现场观测来了解堤坝的扩展
  • 批准号:
    2333837
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
The Open fracture National Evaluation (ONE) Study - South Africa: Improving outcomes in the care of open fractures in low resource settings
开放性骨折国家评估 (ONE) 研究 - 南非:改善资源匮乏地区开放性骨折的护理效果
  • 批准号:
    MR/Y00955X/1
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Fellowship
Conference: An AmeriMech Symposium on Fracture of Soft Materials; Austin, Texas; 12-16 May 2024
会议:AmeriMech 软材料断裂研讨会;
  • 批准号:
    2419299
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Postdoctoral Fellowship: EAR-PF: To roll, flow, or fracture - that is the question: Investigating the mechanisms behind friction and the stability of faults
博士后奖学金:EAR-PF:滚动、流动或断裂 - 这就是问题:研究摩擦和断层稳定性背后的机制
  • 批准号:
    2305630
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Fellowship Award
Influence of Fracture Heterogeneity on Rock Deformation and Failure (INFORM): A Mechanics-based Multi-scale Framework for Radioactive Waste Disposal
裂缝非均质性对岩石变形和破坏的影响(INFORM):基于力学的放射性废物处置多尺度框架
  • 批准号:
    EP/W031221/2
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Research Grant
CAREER: Osteocyte Regulation of Bone Tissue Fracture Resistance
职业:骨细胞对骨组织骨折抵抗力的调节
  • 批准号:
    2340823
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
SBIR Phase I: Design and Development of Minimally-Invasive Orthopedic Fracture Fixation Using Intramedullary Sleeve and Injectable, Light-Triggered Bone Cement
SBIR 第一阶段:使用髓内套管和可注射光触发骨水泥的微创骨科骨折固定的设计和开发
  • 批准号:
    2322411
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了