Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures

Developments in technology require the new materials, lighter and more efficient structures and also new manufacturing methods. In this study, after doing researches about topology optimization, regular honeycomb and re-entrant structures; the regular honeycomb and re-entrant structures were designed, and then Ti-6Al-4V material was chosen for these structures in finite element (FE) analyzing. The three different rib thickness values (t) of 1 mm, 1.5 mm and 2 mm were assigned for honeycomb and re-entrant structures in FE analyses. Also, the crack was created on the models, and then 2-D FE analyses were done for both cracked and un-cracked honeycomb and re-entrant structures under tensile forces through y axis. Afterwards, the effect of crack on stress intensity factor, stresses, strains and displacement were obtained and characterized the auxetic behavior of the regular honeycomb and re-entrant structures. Furthermore, increase in rib thickness decreases stress and strains for each structure. Moreover, re-entrant structures have negative Poisson’s ratio due to their geometric properties and the notable effect of crack on the equivalent stress in re-entrant was emerged in comparison with honeycomb structure.  As a result, the only possible fracture in honeycomb for thickness of 1 mm might be observed owing to stress intensity factor obtained from analyses bigger than fracture toughness of honeycomb structure.    

Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures

Developments in technology require the new materials, lighter and more efficient structures and also new manufacturing methods. In this study, after doing researches about topology optimization, regular honeycomb and re-entrant structures; the regular honeycomb and re-entrant structures were designed, and then Ti-6Al-4V material was chosen for these structures in finite element (FE) analyzing. The three different rib thickness values (t) of 1 mm, 1.5 mm and 2 mm were assigned for honeycomb and re-entrant structures in FE analyses. Also, the crack was created on the models, and then 2-D FE analyses were done for both cracked and un-cracked honeycomb and re-entrant structures under tensile forces through y axis. Afterwards, the effect of crack on stress intensity factor, stresses, strains and displacement were obtained and characterized the auxetic behavior of the regular honeycomb and re-entrant structures. Furthermore, increase in rib thickness decreases stress and strains for each structure. Moreover, re-entrant structures have negative Poisson’s ratio due to their geometric properties and the notable effect of crack on the equivalent stress in re-entrant was emerged in comparison with honeycomb structure.  As a result, the only possible fracture in honeycomb for thickness of 1 mm might be observed owing to stress intensity factor obtained from analyses bigger than fracture toughness of honeycomb structure.    

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Bibtex @araştırma makalesi { politeknik534103, journal = {Politeknik Dergisi}, eissn = {2147-9429}, address = {Gazi Üniversitesi Teknoloji Fakültesi 06500 Teknikokullar - ANKARA}, publisher = {Gazi Üniversitesi}, year = {2020}, volume = {23}, number = {4}, pages = {1015 - 1025}, doi = {10.2339/politeknik.534103}, title = {Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures}, key = {cite}, author = {Ergene, Berkay and Yalçın, Bekir} }
APA Ergene, B. & Yalçın, B. (2020). Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures . Politeknik Dergisi , 23 (4) , 1015-1025 . DOI: 10.2339/politeknik.534103
MLA Ergene, B. , Yalçın, B. "Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures" . Politeknik Dergisi 23 (2020 ): 1015-1025 <
Chicago Ergene, B. , Yalçın, B. "Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures". Politeknik Dergisi 23 (2020 ): 1015-1025
RIS TY - JOUR T1 - Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures AU - Berkay Ergene , Bekir Yalçın Y1 - 2020 PY - 2020 N1 - doi: 10.2339/politeknik.534103 DO - 10.2339/politeknik.534103 T2 - Politeknik Dergisi JF - Journal JO - JOR SP - 1015 EP - 1025 VL - 23 IS - 4 SN - -2147-9429 M3 - doi: 10.2339/politeknik.534103 UR - Y2 - 2019 ER -
EndNote %0 Politeknik Dergisi Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures %A Berkay Ergene , Bekir Yalçın %T Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures %D 2020 %J Politeknik Dergisi %P -2147-9429 %V 23 %N 4 %R doi: 10.2339/politeknik.534103 %U 10.2339/politeknik.534103
ISNAD Ergene, Berkay , Yalçın, Bekir . "Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures". Politeknik Dergisi 23 / 4 (Aralık 2020): 1015-1025 .
AMA Ergene B. , Yalçın B. Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures. Politeknik Dergisi. 2020; 23(4): 1015-1025.
Vancouver Ergene B. , Yalçın B. Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures. Politeknik Dergisi. 2020; 23(4): 1015-1025.
IEEE B. Ergene ve B. Yalçın , "Finite Element Analyzing of the Effect of Crack on Mechanical Behavior of Honeycomb and Re-entrant Structures", Politeknik Dergisi, c. 23, sayı. 4, ss. 1015-1025, Ara. 2020, doi:10.2339/politeknik.534103