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Application of browman constitutive optimization model of stress-strain relationship in aluminum alloy

A stress-strain and optimization model technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problem that the prediction accuracy needs to be further improved, and achieve the effect of high prediction accuracy

Active Publication Date: 2018-10-30
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

At present, many scholars have studied the stress-strain constitutive model of aluminum alloy materials, such as Hollomon, Ludwik, Browman model, etc. Among them, the Browman model is a widely used and mature constitutive model, but the prediction accuracy still needs to be improved. Further improve

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  • Application of browman constitutive optimization model of stress-strain relationship in aluminum alloy
  • Application of browman constitutive optimization model of stress-strain relationship in aluminum alloy
  • Application of browman constitutive optimization model of stress-strain relationship in aluminum alloy

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0045] In order to verify the prediction accuracy of the Browman constitutive optimization model obtained in the present invention, the optimization model is applied to the stress prediction of 6016H18 aluminum alloy below.

[0046] It can be known from formula (3) that the value of n is the slope of the relationship curve between lnσ and ln(sinhε), and the stress test values ​​of 6016H18 aluminum alloy at five temperatures and five strain rates are selecte...

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Abstract

The invention relates to a Browman constitutive optimization model of an aluminum ally stress-strain relation and application of the Browman constitutive optimization model. Combined with aluminum alloy stress-strain experimental data, a strength coefficient, a strain hardening index and a strain rate sensitivity index are calculated according to a least square method, a stress-strain relational expression based on the Browman constitutive optimization model is determined, and aluminum alloy performance is predicated. Compared with the prior art, the Browman constitutive optimization model has the advantages of high prediction accuracy and capability of accurately revealing the rule that the stress of aluminum alloy changes along with strain.

Description

technical field [0001] The invention relates to aluminum alloy performance prediction technology, in particular to a Browman constitutive optimization model of aluminum alloy stress-strain relationship and its application. Background technique [0002] Aluminum alloy is the material of choice for lightweight in the fields of automobile, aviation and aerospace, and its application is very extensive. On spacecraft, aluminum alloy is the ideal material for main fuel tanks and combustion accelerant tanks; on aircraft, aluminum alloy is mainly used for structural materials, such as skins, wall panels and landing gear pillars. Aluminum alloy is also a breakthrough to solve lightweight problems in the transportation industry, including high-speed railway, underground railway transportation, automobile passenger and cargo transportation. The dynamic response of aluminum alloy to the dynamic parameters in the process of thermoplastic processing is reflected by the constitutive relat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/00
CPCG01N3/00
Inventor 张建平
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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