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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
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dc.contributor.advisor | 廖國基(Kuo-chi Liao) | |
dc.contributor.author | Ding-Chuan Huang | en |
dc.contributor.author | 黃鼎筌 | zh_TW |
dc.date.accessioned | 2021-06-17T08:39:09Z | - |
dc.date.available | 2019-08-19 | |
dc.date.copyright | 2019-08-19 | |
dc.date.issued | 2019 | |
dc.date.submitted | 2019-08-08 | |
dc.identifier.citation | [1] Ho, K. and E. Krempl. 2002. Extension of the viscoplasticity theory based on overstress (VBO) to capture non-standard rate dependence in solids. International Journal of Plasticity. 18: 851–872.
[2] Colak, O. U. 2005. Modeling deformation behavior of polymers with viscoplasticity theory based on overstress. International Journal of Plasticity. 21: 145–160. [3] Dusunceli, N. and O. U. Colak. 2008. Modelling effects of degree of crystallinity on mechanical behavior of semicrystalline polymers. International Journal of Plasticity. 24: 1224–1242. [4] Ayoub, G., F. Zairi, M. Nait-Abdelaziz and J.M. Gloaguen. 2010. Modelling large deformation behaviour under loading–unloading of semicrystalline polymers: Application to a high density polyethylene. International Journal of Plasticity. 26: 329–347. [5] Garcia-Gonzalez, D., S. Garzon-Hernandez, A. Arias. 2018. A new constitutive model for polymeric matrices: Application to biomedical materials. Composites Part B. 139: 117-129. [6] Mirkhalaf, M., J. A. W. van Dommelen, L. E. Govaert, J. Furmanski, M. G. D. Geers. 2019. Micromechanical Modeling of Anisotropic Behavior of Oriented Semicrystalline Polymers. Journal of Polymer Science. 57: 378-39. [7] Johnsen, J., A. H. Clausen, F. Grytten, A. Benallal, O. S. Hopperstad. 2019. A thermo-elasto-viscoplastic constitutive model for polymers. Journal of the Mechanics and Physics of Solids. 124: 681-701. [8] Gearing, B.P. and L. Anand. 2004. On modeling the deformation and fracture response of glassy polymer due to shear-yielding and crazing. International Journal of Solids and Structures. 41: 3125-3150. [9] Krairi A. and I. Doghri. 2014. A thermodynamically-based constitutive model for thermoplastic polymers coupling viscoelasticity, viscoplasticity and ductile damage. International Journal of Plasticity. 60: 163–181. [10] Torres, J.P., P.M. Frontini, M. Machado, Z. Major. 2016. Deformation and failure of semicrystalline polymers under dynamic tensile and biaxial impact loading. International Journal of Impact Engineering. 98: 52–61. [11] Fedulov B.N., A.A. Safonov, M.M. Kantor, S.V. Lomov. 2017. Modelling of thermoplastic polymer failure in fiber reinforced composites. Composite Structures. 163: 293–301. [12] Abaqus v.2016. SE Dassault Systèmes Simulia Corp. [13] Isight. SIMULIA. Dassault Systèmes Simulia Corp. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/74497 | - |
dc.description.abstract | 高分子材料之機械強度雖不及金屬材料,然具有生產成本低廉與易於加工之特性,故廣泛應用於電子元件內部之連接器相關產品。為確保連接器元件內嵌之金屬端子零件結構穩固,業界常採用一保持力實驗,透過檢視金屬端子由高分子基座內部拔出之歷程,承受最大反作用力量作為判斷產品是否合格之評估依據。此外業界於數值模擬此類案例時,常採用簡單彈塑性質描述高分子材料機械行為,然此些模擬結果通常與實際量測數據之間具備明顯差異。
本研究檢視兩種類半結晶性(semi-crystalline)高分子材料,尼龍4T (polyamide 4T, PA4T)與液晶高分子(liquid crystal polymer, LCP)承受於相異應變率條件下之單軸壓縮負載反應,搭配適用於描述半結晶性高分子材料之組成律,自行撰寫為使用者副程式,掛載於有限元素分析軟體進行數值分析。該組成律基於過應力之黏塑性理論,可合理描述高分子材料對負載率與環境溫度之依賴性等機械行為。由於組成模型內材料參數繁多,故整合一自動運行之最佳化流程,藉此測試並擬合適當之材料參數組合。本研究亦探討數種前人研究中所提出,應用於描述高分子材料失效之準則適用性,經比對實務連接器產品之保持力實驗與模擬結果,揀選較適用於分析此類案例之失效準則。採用本研究提出之手法進行分析,無論於整體力量-位移曲線抑或保持力數值上,皆可獲致較採用業界常見手法準確之預測。 | zh_TW |
dc.description.abstract | Polymeric materials are widely used in the industries such as aerospace, automotive and electronics due to relatively economical manufacturing cost and acceptable mechanical properties. Retention force of electronic connectors, in general one of essential specification requirements, is defined as a maximum force of metallic terminals withdrawn out of the corresponding plastic housing. It is not an easy task to numerically investigate the retention force based on the authors’ knowledge. Industry commonly applies the conventional elastic-plastic material model to assess the retention force, however the simulation analysis usually significantly underestimate the force based on the experiments. A finite element analysis is performed in conjunction with a self-coded user subroutine, accounting for relaxation/creep behaviors of semi-crystalline thermoplastic polymers under various loading conditions, to appraise the mechanical performance of two semi-crystalline thermoplastic polymers, saying polyamide 4T (PA4T) and liquid crystal polymer (LCP). Material parameters adopted in the constitutive model are evaluated by utilizing the optimization commercial software. Applications of the developed subroutine with several failure criteria to assess retention forces of two types of the connector are conducted. Calculation results agree fairly with the associated experimental measurements. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T08:39:09Z (GMT). No. of bitstreams: 1 ntu-108-R06631006-1.pdf: 4318628 bytes, checksum: 330a970f72ec26ee1cb19e928e8c657a (MD5) Previous issue date: 2019 | en |
dc.description.tableofcontents | 目錄
誌謝 I 摘要 II Abstract III 目錄 IV 圖目錄 VI 表目錄 VIII 第一章 緒論 1 1-1 前言 1 1-2 研究動機與目的 2 1-3 論文架構 3 第二章 文獻回顧 4 第三章 實驗量測 7 3-1 高分子材料單軸實驗 7 3-2 電子連接器端子保持力實驗 11 第四章 高分子材料組成律與失效準則 15 4-1 高分子材料組成律 15 4-2 失效準則 19 第五章 數值模擬 24 5-1 高分子組成律材料參數擬合 24 5-2 失效準則相關參數擬合 31 5-3 電子連接器端子保持力模擬 37 5-4 常見於業界之電子連接器端子保持力分析手法 38 第六章 結果與討論 40 6-1 電子連接器端子保持力實驗與模擬結果比對 40 6-2 與採用常見於業界之分析手法進行電子連接器端子保持力模擬結果比較 43 第七章 結論 45 參考文獻 46 | |
dc.language.iso | zh-TW | |
dc.title | 高分子材料組成與失效模型於電子連接器產業之應用 | zh_TW |
dc.title | Applications of constitutive and damage models of thermoplastic polymers to electronic connector industry | en |
dc.type | Thesis | |
dc.date.schoolyear | 107-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 邱偉忠,呂學育 | |
dc.subject.keyword | 半結晶性高分子材料,使用者副程式,有限元素分析,失效評估, | zh_TW |
dc.subject.keyword | semi-crystalline polymeric materials,user subroutine,finite element analysis,failure assessment, | en |
dc.relation.page | 47 | |
dc.identifier.doi | 10.6342/NTU201902758 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2019-08-08 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 生物產業機電工程學研究所 | zh_TW |
顯示於系所單位: | 生物機電工程學系 |
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