Energy absorption calculations in multiple compressive loading of polymeric foams

Öztürk, Umud Esat; Anlaş, Günay

doi:10.1016/j.matdes.2008.04.054

Cited by 52 publications

(24 citation statements)

References 14 publications

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“…The softening phenomenon for these cushioning structures is the results of the damage, which is responsible for the residual strain. Similar observations were made in the study of Ozturk and Anlas for quasi‐static unloading and reloading responses of PE foam of 58 kg/m 3 density.…”

Section: Experimental Worksupporting

confidence: 84%

“…In our previous research, combination of seventh‐order polynomial and tangent function was used to obtain the model for expanded PS foam. However, as discussed in the study of Ozturk and Anlas, the results change a lot with small variations of some coefficients in third‐polynomial forms besides an exponential term. Hence, the residual strain parameter cannot be incorporated into the constitutive model proposed to evaluate elastic response.…”

Section: Constitutive Models For Multiple Loading and Unloading Condimentioning

confidence: 94%

“…Therefore, what really matters is to understand stress softening and residual strain growth when unloading phase occurs, which will guide subsequent impact responses. Ozturk studied the loading and unloading performance of PE foam at the quasi‐static strain rate and established a polynomial function for predicting loading and unloading curves. Because the constitutive model did not contain residual strain parameter, ie, a relationship between the coefficients of the phenomenological model and the residual strain was not proposed, it fails to predict the multiple loading and unloading mechanical responses of the PE foam by using the proposed constitutive model instead of using linear interpolation between measured stress values to calculate the stress response at unmeasured residual strain.…”

Section: Introductionmentioning

confidence: 99%

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A phenomenological constitutive modelling of polyethylene foam under multiple impact conditions

Hua

Wang

et al. 2019

Packag Technol Sci

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This paper extends the knowledge into the mechanical behaviour characterizations and constitutive modelling of polyethylene (PE) foam under multiple loading and unloading. The mechanical properties of PE foam subjected to single loading cases can be obtained by uniaxial compressive tests at quasi‐static and dynamic states. And the multiple loading and unloading behaviours of the foam can be revealed by consecutive drop tests. The major objective of this research is to propose a phenomenological model consists of shape function and modulus function, which can be predicted compressive response of PE foam for single loading cases. The constitutive models of foamed PE under multiple loading and unloading conditions are established by both using hyperbolic function, where the relations between coefficients and residual strain are introduced. And then, experiments are conducted to validate the proposed model by comparing the constitutive models proposed in this paper and those predicting by finite element software ABAQUS with those by experiments, showing that the proposed models are more accurate for predicting acceleration‐times curves of multiple drop scenarios.

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Section: Experimental Worksupporting

confidence: 84%

Section: Constitutive Models For Multiple Loading and Unloading Condimentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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A phenomenological constitutive modelling of polyethylene foam under multiple impact conditions

Hua

Wang

et al. 2019

Packag Technol Sci

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“…Burgess [2] developed this concept to more representative models of common products. Based on above research result, product is needed cushioning materials, such as expanded polystyrene (EPS) [3] and expanded polyethylene (EPE) [4], which are most widely used in packaging industry due to their low cost, light weight, and good energy-absorbing capabilities. Then cushioning structure such as corrugated [5,6] or honeycomb paperboard [7,8] is utilized to store products during transportation and undergo permanent deformation if the big impact level occurs; hence a portion of kinetic energy is absorbed by outer packaging box, which is neglected in practical design.…”

Section: Introductionmentioning

confidence: 99%

Impact Responses of Composite Cushioning System considering Critical Component with Simply Supported Beam Type

Gao

2014

Advances in Mechanical Engineering

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In some microelectronic products, one or several components can be idealized as simply supported beam type and viewed as vulnerable elements or critical component due to the fact that they are destroyed easily under impact loadings. The composite cushioning structure made of expanded polyethylene (EPE), and expanded polystyrene (EPS) was utilized to protect the vulnerable elements against impact loadings during transportation. The vibration equations of composite cushioning system were deducted and virtual mass method was applied to predict impact behavior of critical component. Numerical results indicate that virtual mass method is appropriate for computing impact response of composite cushioning system with vulnerable element of simply supported beam type, which is affirmed by the fact that the impact responses of structure element in terms of velocity-and displacement-time curves are almost unchanged when virtual mass is smaller than a certain value. The results in this paper make it possible for installation of packaging optimization design.

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“…Thus, the test of double impact in the same point can sound a little excessive at first but in the surrounding area should definitely be considered. There are a considerable numbers of studies on helmets safety, using different approaches and final applications, for instance [6][7][8][9][10][11], just to mention some recent and representative works, mainly focused on EPS material as the main element of the energy absorption liner.…”

Section: Introductionmentioning

confidence: 99%

New composite liners for energy absorption purposes

et al. 2013

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Energy absorption calculations in multiple compressive loading of polymeric foams

Cited by 52 publications

References 14 publications

A phenomenological constitutive modelling of polyethylene foam under multiple impact conditions

A phenomenological constitutive modelling of polyethylene foam under multiple impact conditions

Impact Responses of Composite Cushioning System considering Critical Component with Simply Supported Beam Type

New composite liners for energy absorption purposes

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