Strength of laser welded joints of polypropylene composites

Votrubec, Vlastimil; Hisem, Pavel; Vinšová, Lenka; Lukasova, Vera

doi:10.1088/1757-899x/264/1/012015

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Also the variance of measured data is larger compared to PP composites. Welding conditions, data processing, evaluation and important outputs of these tests were described earlier (Votrubec, 2017). Therefore only the results are shown in the table 3.…”

Section: Experiments On Testing Machinementioning

confidence: 99%

Modelling and Simulation of Laser Welded Joints of Reinforced PP and PC Plastics

Votrubec¹

2019

MER

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Welding of composites decreases their material strength. Proper evaluation of FEM simulations is necessary for correct design and safety factor determination. Neat and reinforced PP and PC specimens were measured on a testing machine to obtain their material properties. Experimental tensile curves were used as inputs in FEM simulations. 15 combinations of specimen were welded on laser work machine and afterwards the welded joint strength was measured on the testing machine. The results of shear tests and FEM simulations are compared in this paper. Also the influence of fiber presence in composites on welded joint strength is discussed. At the end suggestions for safe machinery design of laser welded reinforced composites are given.

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Section: Experiments On Testing Machinementioning

confidence: 99%

Modelling and Simulation of Laser Welded Joints of Reinforced PP and PC Plastics

Votrubec¹

2019

MER

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“…However, for composite joints, it is necessary to consider that the technique is not perfectly controllable due to the random dispersion of the filler in the composite matrix. The previous consideration was estimated by Votrubec et al [ 18 ] on a limited sampling of glass fiber-polyethylene joints. Hence, the filler dispersion degree within the polymeric matrix is a crucial point to achieve the welding of the perfect material and a consequent appreciable mechanical response.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characterization of Nanocomposite Joints Based on Biomedical Grade Polyethylene under Cyclical Loads

et al. 2020

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Polymeric joints, made of biomedical polyethylene (UHMWPE) nanocomposite sheets, were welded with a diode laser. Since polyethylene does not absorb laser light, nanocomposites were prepared containing different percentages by weight of titanium dioxide as it is a laser absorbent. The joints were first analyzed with static mechanical tests to establish the best percentage weight content of filler that had the best mechanical response. Then, the nanocomposites containing 1 wt% titanium dioxide were selected (white color) to be subjected to fatigue tests. The experimental results were also compared with those obtained on UMMWPE with a different laser light absorbent nano filler (carbon, with greater laser absorbing power, gray in color), already studied by our research team. The results showed that the two types of joints had an appreciable resistance to fatigue, depending on the various loads imposed. Therefore, they can be chosen in different applications of UHMWPE, depending on the stresses imposed during their use.

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“…In this paper, which follows on the older studies [8], the laser welded process is used to bond glass reinforced polypropylene (PP) and polycarbonate (PC). Fatigue strength of welded joints is measured by the lap shear strength test method.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Strength of Laser Welded Joints of PP and PC Components

Votrubec¹,

Hisem²,

Vinšová³

et al. 2018

WJM

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The paper describes research of fatigue properties of laser welded joints of PP and PC reinforced composites. Welded specimens were tested on dynamic testing machine to obtain data for fatigue strength and fatigue life evaluation. Materials used for testing were PP and PC plastics filled with various amounts of glass fibers. Nine combinations of PP specimens and 6 combinations of PC specimens were welded and loaded on testing machine by fluctuating stress with constant stress ratio. Presented results include fatigue strength of welded joints and also the S-N curves based on experimental data and theory are derived.

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Strength of laser welded joints of polypropylene composites

Cited by 3 publications

References 4 publications

Modelling and Simulation of Laser Welded Joints of Reinforced PP and PC Plastics

Modelling and Simulation of Laser Welded Joints of Reinforced PP and PC Plastics

Mechanical Characterization of Nanocomposite Joints Based on Biomedical Grade Polyethylene under Cyclical Loads

Fatigue Strength of Laser Welded Joints of PP and PC Components

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