Manufacturing polymer/metal macro-composite structure for vibration damping

Altan, Mirigül; Bayraktar, Meral; Yavuz, Burak Ogün

doi:10.1007/s00170-015-8259-8

Cited by 10 publications

(7 citation statements)

References 16 publications

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“…In such applications, polymeric materials are the only option. (3,4) Polyurethanes are a class of versatile macromolecules with extraordinary and versatile performances, including excellent elasticity, flexibility, a wide range of hardness, high tearing capacity, good abrasion resistance, and processability. (5)(6)(7)(8) There is high interest in their applications as coatings, (9,10) adhesives, (11,12) air filters, (13,14) protective textiles, (15,16) and sensors.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

Gui¹,

Xia²,

Hao³

et al. 2019

Sensors and Materials

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Polymeric materials are used for vibration protection owing to their high-energy dissipation or adsorption. In this study, polyurethane elastomers (PUEs) were prepared using six kinds of chain extender and three types of cross-linking agent. The relationships between their structures and vibration isolation performances were investigated in detail using an independent building vibration isolation sensor. The results showed that elastomers with fewer main chain carbon atoms exhibited better vibration isolation performance. With increasing number of side groups of the chain extender, both the damping and vibration isolation properties were improved. For different cross-linkers, a more irregular structure of the cross-linkers resulted in the better vibration isolation performance of the PUEs.

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Section: Introductionmentioning

confidence: 99%

Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

Gui¹,

Xia²,

Hao³

et al. 2019

Sensors and Materials

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“…It can be concluded from the experimental results of the paired tests (1,2) in Table 4 that, by introducing nanoparticles into the core of sandwich structures, without any variation in impactor characteristics, the increase of contact force and the increase of remaining kinetic energy of impactor were 8.41 and 2.85%, respectively, whereas the decrease in the contact…”

Section: Validationmentioning

confidence: 99%

“…These structures are often subjected to impact actions. Therefore, it is necessary to investigate their impact behavior carefully [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Numerical Investigation on the Low-Velocity Impact Response of Nanoreinforced Polypropylene Core Sandwich Structures

2022

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The impact behavior of sandwich structures was studied using experimental and numerical methods. Polypropylene with 0.5 wt% of graphene (PP/0.5% G) or pure polypropylene (PP) was sandwiched between aluminum face sheets for experimental tests. Impact tests revealed that the nanoreinforced structures had a higher contact force and a shorter contact duration than pure core structures. Both the damage area and the dent depth were lower for nano-reinforced structures. More energy absorbed the pure structures. The higher absorbed energy can be explained by the higher amount of damage that occurred in the structure. To further investigate the impact response of the sandwich structures, a three-dimensional quarter model was developed and implemented in the ABAQUS software. The strain-rate-dependent behavior of the core and face sheets was investigated using the Johnson-Cook material model to simulate the impact behavior of aluminum, PP, and G/PP layers. Simulation results were compared with experimental data, and a good agreement between them was found to exist. The validated finite-element model was used for studying the effects of geometrical and material parameters, including the thickness of aluminum and PP layers, different weight ratios of nanoparticles, and different mechanical properties of the aluminum layers, on the impact response of sandwich structures. By introducing graphene up to 0.5 wt% into the PP material, all of the impact outputs reached their extremum amounts, which were considerably affected by the yield strength and elastic modulus of aluminum layers.

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“…Sonlu elemanlar yöntemine dayalı ANSYS yazılımını da kullanarak bükme sonuçlarını karşılaştırmışlar-dır. Çalışma sonucunda TPE kullanılarak oluşturulan makro kompozit yapının en yüksek sönümleme oranına sahip olduğu görülmüştür [9]. Karaağaç ve Özdemir ise sıvı basıncı ile şekillendirme yöntemiyle geleneksel derin çekme yönte-mini şekillendirilebilirlik, kalınlık değişimi ve üç farklı polimer malzeme maliyet açısından karşılaştırmışlardır.…”

Section: şEkil 1 Plastik Enjeksiyon Kalıplama Yöntemi Ile Sac şEkillunclassified

Plastik Enjeksiyon Kalıplama Yöntemi ile Sac Metallerin Şekillendirilebilirliğinin İncelenmesi

Şen¹,

Altan²

2017

Marmara Fen Bilimleri Dergisi

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ÖZETGünümüzde otomotiv, havacılık ve uzay endüstrisinde karmaşık geometriye sahip ve dar toleranslı parçaların kullanımı giderek artmıştır. Bunun yanı sıra enerji tüketimi imalat aşamasında proses seçimini etkileyen en önemli parametrelerden biri olmuştur. Bu çalışmada, endüstrinin talebini karşılayabilmek ve en az enerji tüketimiyle gerçekleştirebilmek amacıyla sac metal şekillendirme alanında oldukça sık kullanılan sıvı basıncı ile şekillendirme yöntemi incelenmiştir. Deneysel çalışmalar Al-1050.O malzemesi kullanılarak gerçekleştirilmiştir. Geleneksel sıvı basıncı ile şekillendirme yönteminde kullanılan yağ yerine plastik enjeksiyon makinesi yardımıyla ergitilen polimer malzeme kullanılmıştır. İstenilen formda ve tolerans aralığında maksimum şekillendirilebilirliğin sağlanabilmesi için ergiyik polimer sıcak-lığı, enjeksiyon basıncı ve enjeksiyon hızı gibi proses parametreleri dikkate alınarak deneysel çalışmalar yapılmıştır. Taguchi metodu ile optimum proses parametreleri belirlenmiştir. ANOVA metodu ile de parametrelerin, şekillendirilen sacın incelmesi üzerine etkinlikleri irdelenmiştir. Şekillendirme üzerinde enjeksiyon basıncı ve ergiyik sıcaklığının sırasıyla en etkili parametreler olduğu görülmüştür. Ayrıca şekillendirme öncesi malzemeye uygulanan ön ısıtma işleminin uygulanması ile yöntemin uygulanabilirliğinin ve performansının arttığı gözlemlenmiştir.Anahtar kelimeler: Plastik enjeksiyon kalıplama, Sac metal şekillendirme, İncelme oranı, Taguchi metodu. Investigations of Formability of Sheet Metals by Plastic Injection Molding Method ABSTRACTIn recent years, the usage of parts which have complex geometry and low tolerance have been gradually increased in aviation, aerospace and automotive industries. Moreover, energy consumption has became one of the most important parameter in effecting of process selection during the manufacturing. In this study, hydroforming process which has widely used in sheet metal forming was investigated to compensate the demands of industry and enable to product with minimum energy consumption. Experimental work was carried out using Al-1050.O material. In that process, a polymer material that melted by using a injection machine was used instead of oil that was performed in conventional hydroforming process. Experimental studies were conducted taking account of the temperature of polymer, injection pressure and injection velocity to provide maximum formability in demanded form and range of tolerance. Also, Taguchi method was used to determine optimum process parameters. The ANOVA method was used to examine the effectiveness of the parameters on thinning of shaped sheet metal. Injection pressure and temperature of polymer were found to be the most effective parameters, respectively. Furthermore, it was observed that the applicability and performance of method has increased with the application of the pre-heating process on parts before forming.

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Manufacturing polymer/metal macro-composite structure for vibration damping

Cited by 10 publications

References 16 publications

Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

An Experimental and Numerical Investigation on the Low-Velocity Impact Response of Nanoreinforced Polypropylene Core Sandwich Structures

Plastik Enjeksiyon Kalıplama Yöntemi ile Sac Metallerin Şekillendirilebilirliğinin İncelenmesi

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