At the same time we study, analysis and discuss the action that non - linearity - stickiness - springiness and crazing damage of the pmma sample under creep though making us of the knowledge about the high molecule physics the damage theory of material of rheology of bodies with defects. through the study and theory analysis of single - axes stretching experiment in pmma sample under creep, take the surface crazing damage density of pmma sample as an variable, to look for a commonly rule that the crazing damage of pmma, and to offer a feasible damage model for the sake of study that of pmma ' s remoteness damage
同時運用高分子物理、含缺陷流變性物體的材料破壞理論等知識,對無孔洞pmma試件和有孔洞pmma試件
蠕變條件下非線性粘彈性行為及其銀紋損傷現象進行了研究、分析與探討,通過對
蠕變條件下的pmma試件的單軸拉伸實驗研究和理論分析,以pmma試件的銀紋損傷面密
度值為損傷變量,來嘗試尋求pmma銀紋損傷的一般規律,為研究pmma的細觀損傷提供了一種可行的損傷模型。
The fracture toughness values of vermicular graphite cast iron specimen subjected to four different heat treatment methods were tested and compared
摘要比較四種熱處理方法下
蠕墨鑄鐵試樣的斷裂韌
度。
The influences of furnace charges, chemical composition, quality of vermicularizing alloy, holding duration after vermicularizing treatment and tapping temperature on percentage of vermicular graphite were discussed
摘要討論爐料、化學成分、
蠕化劑質量、處理后包內保留時間和溫
度對
蠕墨鑄鐵
蠕化率的影響。
It is shown that paraffin can be uniformly absorbed into the pore network of expanded graphite, that expanded graphite remains its vermiform structure in pcms, that the phase - change temperatures of composite pcms are similar to that of paraffin, and that the latent heat of composite pcms is are based on the mass fraction of paraffin in the composite materials
結果表明:膨脹石墨吸附石蠟后仍然保持了原來疏鬆多孔的
蠕蟲狀形態,石蠟被膨脹石墨微孔所吸附;復合相變儲熱材料的相變溫
度與石蠟相似,其相變潛熱與基於復合材料中石蠟含量的潛熱計算值相當。
First, the basic mechanical capability and creep were proceeded on the material test system with the modified three point bending creep fracture test. the modulus and fracture toughness and tensile strength was attained and creep curve in 200 temperature was also presented. applying basic damage mechanical theory, thermal damage analyses were performed induced in fracture toughness and modulus, the practical formula of damage factors varying with temperature and time was given
首先利用改進的三點彎曲試驗在mts實驗機上進行了巖石力學性能和
蠕變測試,得到了花崗巖在溫
度影響下的彈性模量和斷裂韌
度以及抗拉強
度變化規律,並得到了200下北山花崗巖
蠕變全過程曲線。
The proper interpass temperature is required to prevent cold and hot cracking as well as the proper selection of welding filler material, to produce the proper creep resistance and toughness
需要適當的程間溫
度和正確選擇填充金屬材料來防止冷熱裂縫,產生適當的
蠕變阻力和韌性。
High - creep strength steel
高
蠕變強
度鋼
Short time creep strength
短時
蠕變強
度
Standard test method for determining triaxial compression creep strength of chemical grouted soils
測定化學灌漿土壤的三軸壓縮
蠕變強
度的標準試驗方法
The proper processing, which is difficult, can assure the final acceptable proportion microstructure ( fig. 1 ) and the expected high - temperature creep strength
正確的工藝過程(是很難實現的) ,可以保證最後能被接受的均衡微觀結構和所期待的高溫
蠕變強
度。
We use the method of finite element analysis to find the most dangerous section of the rotator. through setting up a model of rotator, calculating the temperature and stress field of rotator, we get the section. then we supervise the section online, calculate the practical fatigue life loss and creep life loss
我們使用有限元分析法,通過建模,計算轉子溫
度場、應力場,得到最危險截面,然後對危險截面進行在線監測,計算實際運行中的疲勞壽命損耗和
蠕變壽命損耗,為安全經濟運行提供有效監控手段。
Specification for common requirements, for steel fasteners and or fastener materials intended for use at any temperature from cryogenic to the creep range
低溫至
蠕變范圍內任何溫
度下工作的鋼緊固件和或緊固件材料通用要求規范
Standard specification for common requirements for steel fasteners or fastener materials, or both, intended for use at any temperature from cryogenic to the creep range
低溫至蠕變范圍內任何溫度下使用的鋼緊固件和或緊固件材料的通用要求的標準規范