Mechanical Testing and Material Modeling of Thermoplastics: Polycarbonate, Polypropylene and Acrylonitrile-Butadiene-Styrene

2008 ◽  
Vol 1130 ◽  
Author(s):  
Jean-Luc Bouvard ◽  
Hayley Brown ◽  
Esteban Marin ◽  
Paul Wang ◽  
Mark Horstemeyer
Keyword(s):  
Mechanical Response ◽  
Acrylonitrile Butadiene Styrene ◽  
Material Model ◽  
Strain Rates ◽  
Ongoing Research ◽  
Rate Dependent ◽  
Tension Tests ◽  
Model Predictions ◽  
Good Agreement ◽  
Butadiene Styrene

AbstractThe work presents some results of an ongoing research program aimed at building a material database and material models for specific types of polymers. Results for three thermoplastics are the focus of the present article: polycarbonate, polypropylene, and acrylonitrile-butadiene-styrene. Uniaxial compression / tension tests at room temperature and different strain rates have been performed to characterize their mechanical response. A rate-dependent material model has been developed and implemented in a finite element code to predict such mechanical behavior. The model predictions have shown good agreement with the tests results.

Rate-Dependent Constitutive Modeling of Polymer Subjected to Dynamic Loading

2012 ◽  
Vol 185 ◽  
pp. 119-121
Author(s):  
Jian Ming Yuan ◽  
Jan Ma ◽  
Geoffrey E.B. Tan ◽  
Jian Fei Liu
Keyword(s):  
Test Data ◽  
Constitutive Modeling ◽  
Dynamic Compression ◽  
Fem Simulation ◽  
Material Model ◽  
Strain Rates ◽  
Compression Tests ◽  
Material Models ◽  
Rate Dependent ◽  
Tension Tests

This paper proposes an effective and systematical method to obtain reliable rate-dependent material models used in FEM simulation for polymers. Compressive stress-strain curves of two types of polymer are obtained at different strain rates. Rate-dependent elastic-plastic models are applied to describe the observed rate-dependent behaviors, whereby the input data of material model are determined from the test data obtained. Verification of the material models is proposed via comparing FEM simulation with test data of quasi-static tension tests and dynamic compression tests of different strain rates.

scholarly journals Tensile Behavior of Acrylonitrile Butadiene Styrene at Different Temperatures

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Jiquan Li ◽  
Yadong Jia ◽  
Taidong Li ◽  
Zhou Zhu ◽  
Hangchao Zhou ◽  
...  
Keyword(s):  
Mechanical Response ◽  
Glassy State ◽  
Quantitative Relationship ◽  
Acrylonitrile Butadiene Styrene ◽  
Tensile Behavior ◽  
Fitting Method ◽  
Wide Range ◽  
Different Temperatures ◽  
Good Agreement ◽  
Butadiene Styrene

Temperature greatly influences the mechanical response of acrylonitrile butadiene styrene (ABS). The tensile behavior of ABS was explored in this study. The tensile experiments were conducted at a wide range of temperatures (from 40°C to 130°C). A model was established to reveal the quantitative relationship between temperature and tensile behavior of ABS. The results of tensile experiments showed that tensile behavior of ABS exhibited glassy state and high-elastics state. The model was also divided into two parts that rely on the boundary of glass transition temperature, in which the parameters of the model were calculated by the fitting method. The model predictions showed a good agreement with the results of the experimental tensile test. This study provides the quantitative relationship between temperature and tensile behavior of ABS, which saves time and experimental costs.

Modeling of Tread Block Contact Mechanics Using Linear Viscoelastic Theory3

2008 ◽  
Vol 36 (3) ◽  
pp. 211-226 ◽  
Author(s):  
F. Liu ◽  
M. P. F. Sutcliffe ◽  
W. R. Graham
Keyword(s):  
High Speed ◽  
Slip Rate ◽  
Material Model ◽  
Contact Forces ◽  
Block Modeling ◽  
Rate Dependent ◽  
Linear Viscoelastic Material ◽  
Linear Viscoelastic ◽  
The Impact ◽  
Good Agreement

Abstract In an effort to understand the dynamic hub forces on road vehicles, an advanced free-rolling tire-model is being developed in which the tread blocks and tire belt are modeled separately. This paper presents the interim results for the tread block modeling. The finite element code ABAQUS/Explicit is used to predict the contact forces on the tread blocks based on a linear viscoelastic material model. Special attention is paid to investigating the forces on the tread blocks during the impact and release motions. A pressure and slip-rate-dependent frictional law is applied in the analysis. A simplified numerical model is also proposed where the tread blocks are discretized into linear viscoelastic spring elements. The results from both models are validated via experiments in a high-speed rolling test rig and found to be in good agreement.

scholarly journals Sustainable Additive Manufacturing: Mechanical Response of Acrylonitrile-Butadiene-Styrene over Multiple Recycling Processes

2020 ◽  
Vol 12 (9) ◽  
pp. 3568 ◽  
Author(s):  
Nectarios Vidakis ◽  
Markos Petousis ◽  
Athena Maniadi ◽  
Emmanuel Koudoumas ◽  
Achilles Vairis ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Mechanical Behavior ◽  
Mechanical Response ◽  
Positive Impact ◽  
Research Work ◽  
Acrylonitrile Butadiene Styrene ◽  
Experimental Simulation ◽  
Recycling Rate ◽  
Fused Filament Fabrication ◽  
Butadiene Styrene

Sustainability in additive manufacturing refers mainly to the recycling rate of polymers and composites used in fused filament fabrication (FFF), which nowadays are rapidly increasing in volume and value. Recycling of such materials is mostly a thermomechanical process that modifies their overall mechanical behavior. The present research work focuses on the acrylonitrile-butadiene-styrene (ABS) polymer, which is the second most popular material used in FFF-3D printing. In order to investigate the effect of the recycling courses on the mechanical response of the ABS polymer, an experimental simulation of the recycling process that isolates the thermomechanical treatment from other parameters (i.e., contamination, ageing, etc.) has been performed. To quantify the effect of repeated recycling processes on the mechanic response of the ABS polymer, a wide variety of mechanical tests were conducted on FFF-printed specimens. Regarding this, standard tensile, compression, flexion, impact and micro-hardness tests were performed per recycle repetition. The findings prove that the mechanical response of the recycled ABS polymer is generally improved over the recycling repetitions for a certain number of repetitions. An optimum overall mechanical behavior is found between the third and the fifth repetition, indicating a significant positive impact of the ABS polymer recycling, besides the environmental one.

STOCHASTIC VISCOUS-DAMAGE CONSTITUTIVE MODEL FOR CONCRETE

2013 ◽  
Vol 07 (03) ◽  
pp. 1350027
Author(s):  
JIE LI ◽  
QIAOPING HUANG
Keyword(s):  
Damage Model ◽  
Damage Mechanism ◽  
Failure Behavior ◽  
Strain Rates ◽  
Rate Dependency ◽  
Rate Dependent ◽  
Proposed Model ◽  
Model Predictions ◽  
Damage Constitutive Model ◽  
Stochastic Damage

A new rate-dependent stochastic damage model for the dynamic modeling of concrete is presented in the paper. This model is formulated on the basis of the stochastic damage model, from which, the static stochastic evolution of damage is strictly derived. Then, rate dependency of concrete is included by means of viscous-damage mechanism. The model predictions are tested against experimental results on concrete specimens that cover different strain rates. The results demonstrate the proposed model may predict dynamic failure behavior of concrete quite well.

scholarly journals Inelastic Behavior in Repeated Shearing of Bovine White Matter

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Taylor S. Cohen ◽  
Andrew W. Smith ◽  
Panagiotis G. Massouros ◽  
Philip V. Bayly ◽  
Amy Q. Shen ◽  
...  
Keyword(s):  
White Matter ◽  
Strain Rate ◽  
Critical Strain ◽  
Mechanical Response ◽  
Tissue Mechanics ◽  
Strain Rates ◽  
Inelastic Behavior ◽  
Fiber Breakage ◽  
Rate Dependent ◽  
Strain Threshold

Understanding the brain’s response to multiple loadings requires knowledge of how straining changes the mechanical response of brain tissue. We studied the inelastic behavior of bovine white matter and found that when this tissue is stretched beyond a critical strain threshold, its reloading stiffness drops. An upper bound for this strain threshold was characterized, and was found to be strain rate dependent at low strain rates and strain rate independent at higher strain rates. Results suggest that permanent changes to tissue mechanics can occur at strains below those believed to cause physiological disruption or rupture of axons. Such behavior is characteristic of disentanglement in fibrous-networked solids, in which strain-induced mechanical changes may result from fiber realignment rather than fiber breakage.

scholarly journals Исследование влияния размеров образцов на скорость деформации при определении прочностных динамических характеристик материала

2019 ◽  
Vol 89 (4) ◽  
pp. 567
Author(s):  
А.Д. Евстифеев ◽  
Г.А. Волков ◽  
А.А. Чеврычкина ◽  
Ю.В. Петров
Keyword(s):  
Experimental Data ◽  
Theoretical Analysis ◽  
High Strain ◽  
Acrylonitrile Butadiene Styrene ◽  
3D Printer ◽  
Dynamic Tension ◽  
Drop Hammer ◽  
Tension Experiments ◽  
Good Agreement ◽  
Butadiene Styrene

AbstractTest results are presented for an additive material prepared of acrylonitrile-butadiene-styrene on a 3D printer. Dynamic tension experiments have been carried out using a tower-type drop hammer with an accelerator. Data obtained from different specimens demonstrate that high-strain-rate tensile experiments are feasible if the working part of the specimen is decreased. A theoretical analysis of test data using the incubation time criterion has been performed, and it has been found that analytical results are in good agreement with experimental data.

Tensile, compression, and flexural characteristics of acrylonitrile–butadiene–styrene at low strain rates: Experimental and numerical investigation

2020 ◽  
pp. 096739112091661
Author(s):  
Mehmet Akif Dundar ◽  
Gurpinder Singh Dhaliwal ◽  
Emmanuel Ayorinde ◽  
Mohammad Al-Zubi
Keyword(s):  
Acrylonitrile Butadiene Styrene ◽  
Material Model ◽  
The United States ◽  
Shear Loading ◽  
Nonlinear Material ◽  
Current Phase ◽  
Damage Resistance ◽  
Three Point Bending ◽  
Point To Point ◽  
Butadiene Styrene

Acrylonitrile–butadiene–styrene (ABS) is a very significant and widely used amorphous thermoplastic which, on account of its importance in industry, multiplied billions of dollars are spent yearly in the United States alone, not to talk of the rest of the world. It is primarily utilized in industry and domestic situations due to its high damage resistance properties. This fact makes it a required exercise for serious and thorough research in this area to go ahead. In this article, the tension, compression, and bending response behavior of ABS material under various strain rate levels tests were investigated. Its characterization under tensile, compression, and other mechanical testing is thus quite important, to elicit ways of enhancing properties that would make the material or structures made from it, better in service. In the current phase, tension, compression, shear, and flexural samples were tested, because it is of interest to know how the longitudinal and shear loading damages propagate through the specimen length and thickness, and how the microstructure is affected from point to point, both laterally and depth-wise. The issues of energy transfer and dissipation are significant in terms of the effectiveness of this material as a damage retarder. Mat_187 nonlinear material model in Ls-Dyna was utilized to numerically evaluate the behavior of ABS under tension, compression, and three-point bending. The experimental results compared favorably to the numerical results.

A Unified Inelastic Constitutive Model for the Average Engineering Response of Grade 91 Steel

2018 ◽  
Author(s):  
M. C. Messner ◽  
V.-T. Phan ◽  
T.-L. Sham
Keyword(s):  
Mechanical Response ◽  
Kinematic Hardening ◽  
Cyclic Softening ◽  
Strain Rates ◽  
Rate Dependent ◽  
Inelastic Analysis ◽  
Different Temperatures ◽  
Grade 91 ◽  
Tension Compression Asymmetry ◽  
Grade 91 Steel

Grade 91 steel has been called out for use in advanced reactor intermediate heat exchangers and other components. The material has good high temperature creep resistance and thermal properties but has a complex microstructure that manifests as cyclic softening, work softening, and tension/compression asymmetry in its engineering mechanical response. We describe a unified viscoplastic model for the deformation of Grade 91 for an expected operating temperature range spanning from room temperature to approximately 650°C. The model transitions from a rate independent response at low temperatures and high strain rates to a rate dependent, unified viscoplastic response at high temperatures and low creep strain rates. The model captures work and cyclic softening in the material through combined isotropic-kinematic hardening and captures observed tension/compression asymmetry and related anomalous ratcheting effects through a non-J2 flow term. A particular focus of the model is on capturing the average response of Grade 91 as determined from a wide collection of experimental data at many different temperatures, rather than the response of a single set of experiments at a particular temperature. The final model is suitable for the engineering design of nuclear components via inelastic analysis using the ASME Section III, Division 5 procedures.

Sign in / Sign up

Export Citation Format

Share Document