Numerical investigation into the effect of various trigger configurations on crashworthiness of GFRP crash boxes made of different types of cross sections

Hussain, N. Nasir; Regalla, Srinivasa Prakash; Yendluri, Venkata Daseswara Rao

doi:10.1080/13588265.2017.1286964

Cited by 16 publications

(6 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies [17][18][19][20][21] indicated that the crushing triggers of composite tubes incorporated at appropriate locations in the components to initial a stable progressive crushing process in a controlled manner without causing catastrophic failures. End modifications of composite tubes which have been proved to work well include chamfers [1,2,5,7,15,18], slots [22], tulip geometries [23,24] and so on. Meanwhile, the end modifications of plate composites have also been investigated in previous studies [15,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of trigger on crashworthiness of unidirectional carbon fibre reinforced polyamide 6 composites

Ma¹,

Jin

Zhang

2018

Plastics, Rubber and Composites

View full text Add to dashboard Cite

Carbon fibre as reinforcement and polyamide resin as matrix were used to manufacture unidirectional laminates by using hot compression method for investigating the effect of trigger on their crashworthiness and energy absorption capability through static compression tests. Two types of trigger including single and double bevel trigger were used meanwhile six trigger angles from 30°to 80°of each type were employed to investigate the trigger effect. Optical observation was employed to observe the crushed cross section of each laminates to explain the fracture behaviour.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of trigger on crashworthiness of unidirectional carbon fibre reinforced polyamide 6 composites

Ma¹,

Jin

Zhang

2018

Plastics, Rubber and Composites

View full text Add to dashboard Cite

show abstract

“…The mass and height of the impactor were selected to achieve the total impact energy of 4820 J, which was the average impact energy for a large variety of crash box specimens investigated in the numerical simulation. 28…”

Section: Drop-weight Impact Testingmentioning

confidence: 99%

Drop-weight impact testing for the study of energy absorption in automobile crash boxes made of composite material

Hussain

Regalla

Rao

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

Self Cite

View full text Add to dashboard Cite

There is an ever-increasing demand in the automotive sector to continuously improve the performance and reduce cost through weight reduction in the structure of the vehicle. In the present scenario, it is also necessary to meet the standards set by crash safety regulating authorities in various parts of the world. In automobiles, the crash box is placed in the anterior region to absorb the impact energy in the event of an accident. Glass fiber reinforced plastic crash boxes have a high strength-to-weight ratio and also are good in energy absorption, particularly useful in this scenario. In this paper, the effectiveness of different triggers in combination with various geometries is investigated for Glass fiber reinforced plastic crash boxes using drop-weight impact testing. A trigger is a geometric irregularity introduced in the crash box design to alter the energy as well as force levels by modifying the deformation mode under loading. Comparison of change in force level, absorption of impact energy, specific energy absorption values was performed for composite crash boxes made of various types of cross-sectional geometries along with multiple patterns of triggers. Force versus displacement (F–D) curves are drawn for all the cases of the glass fiber reinforced plastic crash boxes to understand the behavior of each combination formed with various types of geometries and triggers, under impact loading. Strength-to-weight ratio was considered as the deciding factor for the comparisons to know the best and worst cases of the crash boxes made of different cross-sections along with various trigger types. This study provides detailed insights into the drop-weight impact testing procedure including the preparation of specimens, setting up the drop-weight impact test, preparation of specimen clamps, safety precautions involved, data acquisition from the test and its processing.

show abstract

“…Many of these show a positive effect during dynamic crushing; however, they are more expensive to manufacture, and at the point of joining of individual walls, the material often cracks, which decreases the absorber efficiency. Circular and rectangular shapes prove to be the most effective; hence, research has begun to develop profiles of this type with varying sidewall thicknesses [24,25]. The use of thickness gradations allows the stiffness to vary at different stages of the crush, and the energy absorber performance increases as the analysis proceeds [26].…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Geometrical Parameters of a Hexagonal Trigger on Energy Absorber Performance Using ANN

2021

View full text Add to dashboard Cite

Thin-walled structures are commonly used as energy absorbers in motor vehicles. Their function is to protect the structural components of vehicles and to absorb energy completely during collisions up to 20 km/h. This paper focuses on maintaining crush axiality during research. To verify the numerical analyses, physical specimens were made and then subjected to dynamic crushing. Force and shortening values as well as high-speed camera images were used for data analysis. Through time-lapse shots, plastic deformation within the crush initiator was observed. Such detailed analysis allowed the determination of the influence of hexagonal triggers in the form of notches on the post-buckling progressive analysis. In this paper, neural networks were used to examine the importance of each variable. Data from numerical analyses were used for this purpose. Based on the analyses performed, the effects of both the width and height of the triggers on the crush load efficiency (CLE) and total efficiency (TE) ratios can be seen. The width of the crush initiator has the greatest influence on Crash-box performance. Nevertheless, increasing both the height and the width of the initiator can result in crush non-axiality and underperformance of the energy absorber.

show abstract

Numerical investigation into the effect of various trigger configurations on crashworthiness of GFRP crash boxes made of different types of cross sections

Cited by 16 publications

References 26 publications

Effect of trigger on crashworthiness of unidirectional carbon fibre reinforced polyamide 6 composites

Effect of trigger on crashworthiness of unidirectional carbon fibre reinforced polyamide 6 composites

Drop-weight impact testing for the study of energy absorption in automobile crash boxes made of composite material

Study on the Effect of Geometrical Parameters of a Hexagonal Trigger on Energy Absorber Performance Using ANN

Contact Info

Product

Resources

About