B組分含水量對丁基防水嵌縫膠性能的影響
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丁基防水嵌縫膠溫度和應變率相關
- 發布時間 : 2023-3-30 11:48:50
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(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.
丁基防水嵌縫膠溫度和應變率相關
(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.
- 發布時間 : 2023-3-30 11:48:50
- Views:
Information
方程((4.17)模型中的a,b和c是材料常數，與丁基防水嵌縫膠溫度和應變率相關的本構模型中的材料常數相同，可通過實驗室環境濕度條件下試件的單軸拉伸試驗結果獲得;f和g是替換丁基防水嵌縫膠溫度項后新的吸濕度相關的材料常數，可通過在不同吸濕度變化條件下試件的單軸拉伸試驗結果獲得。吸濕度和應變率相關的模型材料常數，如表4.10所示。
通過3.4.1節可知丁基防水嵌縫膠材料的吸濕度變化與吸濕丁基防水嵌縫膠溫度和吸濕時間有關。吸濕度(HD)隨吸濕時間is和吸濕丁基防水嵌縫膠溫度TS的增大而增大，且變化情況呈現一定的冪函數規律。故可將吸濕度的表達式假定為其中，is一吸濕時間(h)Ts一吸濕丁基防水嵌縫膠溫度(K),a,b和c為材料常數。根據吸濕度隨吸濕時間和吸濕丁基防水嵌縫膠溫度的變化，作出的關系圖，線性擬合得到材料常數如圖4.14和4.15所示。
在丁基防水嵌縫膠溫度和應變率相關的模型計算中，Zener-Hollomon參數和,Arrhenius類型的關系方程用于表達丁基防水嵌縫膠溫度和應變率的禍合作用，而吸濕度會對材料帶來與丁基防水嵌縫膠溫度類似的影響。為了描述硅烷改性丁基防水嵌縫膠在不同吸濕度狀態下的拉伸情況，將丁基防水嵌縫膠溫度(T)變量替換成吸濕度(HD)變量。新的Zener-Hollomon參數為:
根據不同應變速率下的單軸拉伸試驗結果，對方程(4:22)和(4.23)兩邊取對數，由拉伸強度和應變率的變化關系，可作出lnap-lns和aP-1nE的函數關系圖，如圖4.16和圖4.17所示。分別通過線性擬合的方法及材料常數之間的關系刀二a x n，獲得材料常數a。www.www.lustload.com
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