Research on the progressive damage model and trigger geometry of composite waved beam to improve crashworthiness

Jiang, Hongyong; Ren, Yiru; Gao, Binhua

doi:10.1016/j.tws.2017.07.004

Cited by 41 publications

(14 citation statements)

References 35 publications

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“…In spite of high strength and stiffness of composite, the EACS may also display low mechanical performances if the macro or micro structures are not reasonably designed. 14 Thus, a large number of studies have reported that mechanical performances of composite structures are susceptible to structural geometry, fiber orientation, distribution of reinforcement, trigger structure, and environmental conditions. 15–24 Notably, the use of trigger is a very effective method to reduce the initial peak load and maximize energy absorption (EA) of EACS while collapsing progressively in a controlled manner.…”

Section: Introductionmentioning

confidence: 99%

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Gradient-degraded material-induced trigger to improve crashworthiness of composite tubes in a controlled manner

Jiang

Zheng

2019

Journal of Reinforced Plastics and Composites

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A type of gradient-degraded material-induced trigger has a greater potential to induce a progressive crushing mode in a controlled manner to reduce the initial crushing load and increase the specific energy absorption. Thus, different material degradation strategy-based triggers are designed to improve the crashworthiness of composite tubes. To understand the triggering mechanisms, effects of height of trigger and level of degradation are studied using single material degradation strategies. In turn, gradient material degradation strategies are novelly presented to explore different crushing behaviors of tube. Further, an improved gradient material degradation gathering all features of single material degradation and gradient material degradation is proposed. The virtual quasi-static crushing tests are conducted where the model considers intra-ply and inter-ply failure initiation and damage evolution. The crushing behaviors of all triggered tubes are compared. From the predicted results, it is found that both the height of trigger and level of degradation have significant effects on the crushing behavior. The multi-phased or progressive initial crushing process is presented by using gradient material degradation. By comparison, the tube using the improved gradient material degradation presents 8.26% lower peak load, 8.75% higher specific energy absorption, and 25% higher crushing load stability than the original tube.

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Section: Introductionmentioning

confidence: 99%

“…15–24 Notably, the use of trigger is a very effective method to reduce the initial peak load and maximize energy absorption (EA) of EACS while collapsing progressively in a controlled manner. 14…”

Section: Introductionmentioning

confidence: 99%

Gradient-degraded material-induced trigger to improve crashworthiness of composite tubes in a controlled manner

Jiang

Zheng

2019

Journal of Reinforced Plastics and Composites

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“…The chamfer failure trigger is one of the most effective ways to reduce the initial peak load as well as improve EA capacity by Siromani et al . However, the triggering mechanism by machining special geometry at the end‐lip of structure can only reduce the initial peak load to a certain degree, and contributions to the energy absorption are very slight for some structures .…”

Section: Introductionmentioning

confidence: 99%

“…According to relevant researches, it remains challenging for the prediction of their failure behavior due to its easily affected by many factors, including stacking sequence, material properties, loading condition and triggering mechanism, and so forth [16][17][18][19][20][21][22][23]. Regardless of the composite components, the trigger mechanism is a key technology to the energy absorbing (EA) mechanism [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Energy‐absorption performance of composite corrugated plates with corrugated‐shape ditch plug initiator

et al. 2018

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To improve the energy‐absorbing capacity of composite corrugated plate, the axial impact responses under axial quasi‐static crush loading is numerically studied and compared. Both the intra‐ply damage and delamination interface damage are considered. To accurately capture the progressive damage propagation, the failure material is modeled with a stiffness degradation method combined with the exponential damage evolution laws. To improve the crush performance, a novel corrugated‐shape ditch plug initiator (CDP) is proposed. The effects of extensive parameters including the ditch width and the inner geometry are carried out. Results show that well agreements between the numerical model and experimental results are identified on failure modes and energy‐absorption characteristics. The corrugated plate with CDP can increase the specific energy absorption by 20.3% than non‐plug initiator. The total of energy absorption is the decreasing function with respect to the width of ditch. The crushing performance can be improved due to the change in the inner geometry parameters. POLYM. COMPOS., 40:1708–1717, 2019. © 2018 Society of Plastics Engineers

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“…the effect of various types of triggers is investigated for GFRP composite crash boxes. Hussain et al [28] investigated a comparative study of variation of peak forces, energy absorbed, S.E.A (specific energy absorbed) with the variation of triggers for crash box.…”

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confidence: 99%

Developed trigger mechanisms to improve crush force efficiency of aluminium tubes

Rai

Ghasemnejad

Watson

et al. 2019

Engineering Structures

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This paper aims to investigate the effect of a trigger mechanism on the crush force efficiency of Aluminium tubular absorbers. Various trigger mechanisms such as cutout holes, circumferential notch and end-fillet, were studied using the validated numerical model. Initially, tubes made of aluminium displayed better crashworthiness behaviour when compared with steel tubes based on numerical and experimental results. Then the trigger mechanism consisting of three cutout holes was found more efficient than the ones with an end fillet and a circumferential notch based on a comparative study. According to these results, the developed trigger mechanisms have a significant change in crashworthiness performance of tubular absorbers. Crush force efficiency was doubled with the help of this trigger mechanism while stroke efficiency and specific energy absorptions were reduced by 4% and 15% respectively.

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Research on the progressive damage model and trigger geometry of composite waved beam to improve crashworthiness

Cited by 41 publications

References 35 publications

Gradient-degraded material-induced trigger to improve crashworthiness of composite tubes in a controlled manner

Gradient-degraded material-induced trigger to improve crashworthiness of composite tubes in a controlled manner

Energy‐absorption performance of composite corrugated plates with corrugated‐shape ditch plug initiator

Developed trigger mechanisms to improve crush force efficiency of aluminium tubes

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