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Updated: Jun 28, 2025

A Novel Biaxial Testing Apparatus for the Determination of Forming Limit under Hot Stamping Conditions
07:40

A Novel Biaxial Testing Apparatus for the Determination of Forming Limit under Hot Stamping Conditions

Published on: April 4, 2017

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关于AM60B合金塑料构成关系和柔性断裂标准的研究

Qin Yang1,2, Bin Jiang1,2, Liang Gao3

  • 1National Engineering Research Center for Magnesium Alloys, Chongqing University, No. 174, Shazheng Street, Shapingba District, Chongqing 400044, China.

Materials (Basel, Switzerland)
|April 13, 2024
PubMed
概括

预测汽车事故中金属零件的行为是很困难的. 这项研究开发了压合金的新模型,准确预测汽车应用中的变形和断裂.

关键词:
AM60B AM60B AM60B AM60B AM60B AM60B AM60B AM60B AM60B AM60B AM60B AM60B AM60BDIEM (损伤启动和进化模型) 断裂模型模型.乔治·约翰逊 (约翰逊库克) 的骨折模型.MMC (修改的莫尔·库伦模型) 断裂模型.变形行为 变形行为压力状态就是压力状态.

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Plasticity00:58

Plasticity

Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
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Stress-Strain Diagram - Ductile Materials

The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
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Plastic Behavior01:21

Plastic Behavior

A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Plastic Deformations

Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
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