Study on mechanical properties and constitutive model of 5052 aluminium alloy

AbstractRegional mechanics of the heart is vital in the development of accurate computational models for the pursuit of relevant therapies. Challenges related to heart dysfunctioning are the most important sources of mortality in the world. For example, myocardial infarction (MI) is the foremost killer in sub-Saharan African countries. Mechanical characterisation plays an important role in achieving accurate material behaviour. Material behaviour and constitutive modelling are essential for accurate development of computational models. The biaxial test data was utilised to generated Fung constitutive model material parameters of specific region of the pig myocardium. Also, Choi-Vito constitutive model material parameters were also determined in various myocardia regions. In most cases previously, the mechanical properties of the heart myocardium were assumed to be homogeneous. Most of the computational models developed have assumed that the all three heart regions exhibit similar mechanical properties. Hence, the main objective of this paper is to determine the mechanical material properties of healthy porcine myocardium in three regions, namely left ventricle (LV), mid-wall/interventricular septum (MDW) and right ventricle (RV). The biomechanical properties of the pig heart RV, LV and MDW were characterised using biaxial testing. The biaxial tests show the pig heart myocardium behaves non-linearly, heterogeneously and anisotropically. In this study, it was shown that RV, LV and MDW may exhibit slightly different mechanical properties. Material parameters of two selected constitutive models here may be helpful in regional tissue mechanics, especially for the understanding of various heart diseases and development of new therapies.

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Realization of structural evolution in grain boundary, solute redistribution and improved mechanical properties by adding TiCnps in wire and arc additive manufacturing 2219 aluminium alloy

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2021.01.030 ◽

2021 ◽

Vol 11 ◽

pp. 834-848

Author(s):

Peng Jin ◽

Yibo Liu ◽

Fuxiang Li ◽

Junzhao Li ◽

Qingjie Sun

Keyword(s):

Mechanical Properties ◽

Additive Manufacturing ◽

Grain Boundary ◽

Aluminium Alloy ◽

Structural Evolution ◽

Solute Redistribution

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Effect of Nanopores on Mechanical Properties of the Shape Memory Alloy

Micromachines ◽

10.3390/mi12050529 ◽

2021 ◽

Vol 12 (5) ◽

pp. 529

Author(s):

Chunzhi Du ◽

Zhifan Li ◽

Bingfei Liu

Keyword(s):

Mechanical Properties ◽

Constitutive Model ◽

Shape Memory ◽

Young’S Modulus ◽

Residual Strain ◽

Surface Effect ◽

Young's Modulus ◽

Strain Curve ◽

Stress Strain ◽

Strength Limit

Nanoporous Shape Memory Alloys (SMA) are widely used in aerospace, military industry, medical and health and other fields. More and more attention has been paid to its mechanical properties. In particular, when the size of the pores is reduced to the nanometer level, the effect of the surface effect of the nanoporous material on the mechanical properties of the SMA will increase sharply, and the residual strain of the SMA material will change with the nanoporosity. In this work, the expression of Young’s modulus of nanopore SMA considering surface effects is first derived, which is a function of nanoporosity and nanopore size. Based on the obtained Young’s modulus, a constitutive model of nanoporous SMA considering residual strain is established. Then, the stress–strain curve of dense SMA based on the new constitutive model is drawn by numerical method. The results are in good agreement with the simulation results in the published literature. Finally, the stress-strain curves of SMA with different nanoporosities are drawn, and it is concluded that the Young’s modulus and strength limit decrease with the increase of nanoporosity.

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Rate-related Study on Mechanical Properties and Fracture Characteristics in Aluminium Alloy via Electromagnetic Ring Expansion Test

International Journal of Mechanical Sciences ◽

10.1016/j.ijmecsci.2021.106712 ◽

2021 ◽

pp. 106712

Author(s):

Huijuan Ma ◽

Wenjie Mao ◽

Hongliang Su ◽

Hui Zhu ◽

Xuhua Cui ◽

...

Keyword(s):

Mechanical Properties ◽

Aluminium Alloy ◽

Ring Expansion ◽

Fracture Characteristics ◽

Expansion Test

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Study on the Formability of Aluminium Alloy Sheets at Room and Elevated Temperatures

Materials Science Forum ◽

10.4028/www.scientific.net/msf.877.393 ◽

2016 ◽

Vol 877 ◽

pp. 393-399

Author(s):

Jia Zhou ◽

Jun Ping Zhang ◽

Ming Tu Ma

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Elevated Temperature ◽

Aluminium Alloy ◽

Aluminium Alloys ◽

Elevated Temperatures ◽

Hot Stamping ◽

Natural Aging ◽

Alloy Sheet ◽

Aluminum Alloy Sheet

This paper presents the main achievements of a research project aimed at investigating the applicability of the hot stamping technology to non heat treatable aluminium alloys of the 5052 H32 and heat treatable aluminium alloys of the 6016 T4P after six months natural aging. The formability and mechanical properties of 5052 H32 and 6016 T4P aluminum alloy sheets after six months natural aging under different temperature conditions were studied, the processing characteristics and potential of the two aluminium alloy at room and elevated temperature were investigated. The results indicated that the 6016 aluminum alloy sheet exhibit better mechanical properties at room temperature. 5052 H32 aluminum alloy sheet shows better formability at elevated temperature, and it has higher potential to increase formability by raising the temperature.

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Study on Multi-Axial Mechanical Properties of a Polyurethane Foam and Experimental Verification

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.311-313.301 ◽

2011 ◽

Vol 311-313 ◽

pp. 301-308

Author(s):

Shou Hong Han ◽

Zhen Hua Lu ◽

Yong Jin Liu

Keyword(s):

Mechanical Properties ◽

Constitutive Model ◽

Polyurethane Foam ◽

Axial Compression ◽

Axial Loading ◽

Hydrostatic Compression ◽

Model Parameters ◽

Loading Conditions ◽

Three Point Bending ◽

Pu Foam

In order to investigate the multi-axial mechanical properties of a kind of PU (polyurethane) foam, some experiments in different loading conditions including uni-axial tension, uni-axial compression, hydrostatic compression and three-point bending were conducted. It is shown that the hydrostatic component influences yield behavior of PU foam, the yield strength and degree of strain hardening in hydrostatic compression exceed those for uni-axial compression. In terms of the differential hardening constitutive model, the evolution of PU foam yield surface and plastic hardening laws were fitted from experimental data. A finite element method was applied to analyze the quasi-static responses of the PU foam sandwich beam subjected to three-point bending, and good agreement was observed between experimental load-displacement responses and computational predictions, which validated the multi-axial loading methods and stress-strain constitutive model parameters. Moreover, effects of two foam models applied to uni-axial loading and multi-axial loading conditions were analyzed and compared with three-point bending tests and simulations. It is found that the multi-axial constitutive model can bring more accurate prediction whose parameters are obtained from the tests above mentioned.

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