On the Use of Polyurethane Foam Paddings to Improve Passive Safety in Crashworthiness Applications

Paulino, Mariana; Teixeira-Dias, Filipe

doi:10.5772/47996

Cited by 12 publications

(8 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, within the automotive industry, the use of paddings with a high level of crashworthiness is a key aspect to improve the security standards of domestic vehicles. 6,7 Other suitable applications of RPUFs include helmets, 8 impact resistant work gloves, cushioning, 9 insulation, 10 and packaging. 11,12 The development of polymer nanocomposites has produced a new class of materials with superior mechanical, 13 thermal, 14 and transport properties.…”

Section: Introductionmentioning

confidence: 99%

Compressive behavior of rigid polyurethane foams nanostructured with bacterial nanocellulose at low and intermediate strain rates

Chiacchiarelli

Cerrutti

Flores‐Johnson

2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

Nanocellulose reinforced foams are lightweight with improved mechanical properties; however, the strain‐rate effect on their mechanical response is not yet fully understood. In this work, rigid polyurethane foams (PUFs) nanostructured with bacterial nanocellulose at 0.2 wt % (BNCF) and without it (PUF) are synthesized and subjected to compression tests at different strain rates. The BNC acts as a nucleation agent, reducing the cell size but maintaining a similar apparent density of 40.4 ± 3.3 kg m−3. Both BNCF and PUF exhibit strain‐rate effect on yield stress and densification strain. The BNCF exhibits localized progressive crushing and reduced friability, causing a remarkable recovery in the transverse direction. Numerical simulations show that functionally graded foams subjected to impact could be designed using different layers of PUF and BNCF to vary energy absorption and acceleration rate. The results presented herein warrant further research of the mechanical properties of nanostructured foams for impact applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48701.

show abstract

Section: Introductionmentioning

confidence: 99%

Compressive behavior of rigid polyurethane foams nanostructured with bacterial nanocellulose at low and intermediate strain rates

Chiacchiarelli

Cerrutti

Flores‐Johnson

2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…After one impact, the capacity of this material to keep absorbing energy is almost unchanged. Few researchers recently studying this material also tried to employ it in a great variety of applications, such as road helmets [2,3] and vehicle's passive safety mechanisms [18]. When compared to synthetic cellular materials, cork also appears as a sustainable alternative, once it is fully recyclable and the tree is not harmed as renewing its outer bark every nine years.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Comparing the mechanical performance of synthetic and natural cellular materials

et al. 2015

View full text Add to dashboard Cite

a b s t r a c tThis work compares the mechanical performance of agglomerated cork against synthetic materials typically used as impact energy absorbers. Particularly, the study will focus on the expanded polystyrene (EPS) and expanded polypropylene (EPP).Firstly, quasi-static compression tests are performed in order to assess the energy storage capacity and to characterize the stress-strain behavior cellular materials under study. Secondly, guided drop tests are performed to study the response of these materials when subjected to multiple dynamic loading (two impacts). Thirdly, finite element analysis (FEA) is carried out in order to simulate the compressive behavior of the studied materials under dynamic loading.Results show that agglomerated cork is an excellent alternative to the synthetic materials. Not only for being a natural and sustainable material but also for withstanding considerable impact energies. In addition, its capacity to keep some of its initial properties after loading (regarding mechanical properties and dimensions) makes this material highly desirable for multiple-impact applications.

show abstract

“…Polyurethane are unique polymer material with wide range of physical and chemical properties that is widely used in energy absorption's application such as in passive safety mechanism in automotive industries. It has the ability to absorb energy while deforming due to the mechanics of cell crushing [20] Polyurethane foam-filled structure may compensate irregular overall buckling and the unstable effect during crushing process [21]. Besides, foam-filled thin-walled tubes were introduced to enhanced the energy absorption while maintaining the mass of the vehicle.…”

Section: Optimization Of Foam-filled Square Thin-walled Aluminium Strmentioning

confidence: 99%

Optimization of Foam-Filled Square Thin-Walled Aluminium Structures

Rahim*,

Salleh

2019

IJRTE

View full text Add to dashboard Cite

Crash box are the structural part designed to absorb energy during crash and minimize the injury to passengers. Various design of energy absorbers has been introduced to unleash design with the best crashworthiness behavior. Foam-filled structures are one of the promising designs. In this study, foam-filled structure was investigated to increase the energy absorption capability and reduce the initial peak force simultaneously. Since most foam-filled structures tend to absorb more energy with high peak force, optimization of the energy absorbers is significant in obtaining the optimum design. Response surface methodology (RSM) has been dominant technique in crashworthiness optimization mainly because of it provides efficient and accurate solution. This paper focused on the optimization foam-filled columns with respect to thickness of the tube and length of foam to enhance energy absorptions and reduce initial peak force. The optimization results suggested by Design Expert software for impact test is 515.9 J for EA and 134.94kN for IPF value with the column thickness of 2.0mm and foam length of 185mm. For quasi-static test, the optimum solution value for EA and IPF are 864.5J and 88.33kN respectively with column thickness of 1.87mm and foam length of 200mm.

show abstract

On the Use of Polyurethane Foam Paddings to Improve Passive Safety in Crashworthiness Applications

Cited by 12 publications

References 50 publications

Compressive behavior of rigid polyurethane foams nanostructured with bacterial nanocellulose at low and intermediate strain rates

Compressive behavior of rigid polyurethane foams nanostructured with bacterial nanocellulose at low and intermediate strain rates

Comparing the mechanical performance of synthetic and natural cellular materials

Optimization of Foam-Filled Square Thin-Walled Aluminium Structures

Contact Info

Product

Resources

About