屈曲應力 的英文怎麼說
中文拼音 [qūqūyīnglì]
屈曲應力
英文
buckling stress-
The numerical results show that the elephant foot bulging is in fact buckling failure which is caused by the overcritical compressive stress rather than intensity failure
分析表明:立式儲液罐罐壁「象足」變形主要是由罐壁縱向壓應力超過臨界應力而產生的局部屈曲破壞,並非強度破壞。On the basis of this, the paper makes a great deal of calculation and analysis in this part, different parameters " effect and stress gradient are included. local buckling coefficient and the efficient width calculated formula are provided and look forward to take a reference to the redaction of the specification
本文對此內容進行了較為深入的研究,考慮了多個參數的影響,對各種應力比作用下的楔形腹板的屈曲及屈曲后強度進行了計算分析,得出了考慮翼緣相關作用的楔形腹板屈曲系數及有效寬度系數的計算公式,以期為規范的修訂提供參考。Yield point under bending stress
彎曲應力下的屈服點The triaxial shear test of the original loess is carried out and the ct scanning is ongoing at the same time. combining images and data of the ct scanning with the stress - strain curve, the course of soften dehiscence damage and harden yield damage is explained by means of damage theory
進行了原狀黃土的三軸剪切試驗過程中的ct掃描,結合ct圖像、數據與應力應變曲線,利用損傷理論方法解釋了軟化開裂破壞和硬化屈服破壞過程。In the hogging condition, double bottom and the side shell remain the ultimate bucking strength, deck and upperwing tank remain the yield stress, and the other parts keep elasticity. then the key to calculate the ultimate strength of ship hull girders is to ascertain the ultimate bucking strength of the stiffened panels. in this regard, the developed formulation is designed to be more sophisticated than previous simplified theoretical method for calculating the ultimate strength of stiffened panels under combined in - plane bending and lateral pressure. fabricatio n - related initial imperfections ( initial deflections and residual stresses ) are included in the panel ultimate strength calculation as parameters of influence. all possible collapse modes involed in collapse of stiffened panels, including overall buckling collapse, column or beam - column type collapse, tripping of stiffeners and local bukling of stiffened web are considered
確定了船體梁整體破壞時的剖面應力分佈之後,關鍵在於確定板架的極限屈曲強度。本文充分考慮了在縱向彎曲、橫向壓力作用下加筋板可能發生的幾種破壞模式,即板架的整體屈曲破壞、樑柱形式的破壞、筋的側傾、腹板的屈曲並同時考慮了初始焊接殘余應力、初撓度的影響,使其更精確的計算加筋板的屈曲強度。對于加筋板中加強筋腹板的局部屈曲,採用解析法推導出筋的腹板的撓度方程及其邊界條件,求解相應的方程,從而計算出腹板的局部屈曲應力。Determination method of the damage threshold stress and damage threshold strain is given, six kinds of damage variables ( which are across isotropy effectual elastic modulus damage variable, simple effectual elastic modulus damage variable, density damage variable, volume damage variable, volume density damage variable and area density damage variable ) are defined, evolution curves and evolution equations of harden yield damage are obtained
提出了損傷應力和應變門檻值的確定方法,並定義了六種損傷變量(即橫觀各向同性有效彈性模量損傷變量,簡單有效彈性模量損傷變量,密度損傷變量,體積損傷變量,體積密度損傷變量和面積密度損傷變量) ,在此基礎上得出了硬化屈服損傷過程中的損傷演化曲線和演化方程。The panels of hull girder may collapse or buckle before it reaches the yield stress. the curve of the stress - strain is usually constituted by stable zone -, non load - shedding zone and load - shedding zone
並且船體截面的組成單元(一般是加筋板單元)在達到材料屈服應力之前還可能發生多種形式的屈曲。The author analyses the tripping of stiffener and three patterns of panel ' s invalidation, so to get the curve of stress - strain of panel. this step is the core of the thesis
本文從理論入手,分析了加筋板單元中加強筋的側傾屈曲,然後根據加筋板的三種破壞模式,得到單元的應力應變關系曲線,這是本文的重點與難點。In the formula, our experience in structural strength design and the experimental results are considered. and such factors are also considered as differences in materials of the skin and the reinforcer, effects of bending, torsion, stretching and offcenter of the reinforcer. furthermore, through post - buckling stress analysis of the skin, it is shown that even low stress level will result in buckling of the skin, but the skin still has loading capacity
在總結過去結構強度設計和試驗分析的基礎上,應用扁殼理論,在廣義力與廣義應變關系中考慮了蒙皮與加筋不同材料以及加筋的彎曲、扭轉、伸縮和偏心等的影響,推導出適合於工程應用的加筋殼結構軸壓屈曲臨界載荷的計算方法;並通過對薄壁結構蒙皮后屈曲應力分析,說明蒙皮在很低的應力水平時就出現失穩現象,但失穩后的蒙皮仍具有一定的承載能力。In the analysis of the elastic local buckling strength of the stiffener ' s web, the elastic critical stress is analytically derived by solving the characteristic value problem involving the governing differential equation under the corresponding loading and boundary conditions
對于加筋板中加強筋腹板的局部屈曲,則用解析法推導出筋的腹板的撓度方程及其邊界條件,求解相應的方程,從而計算出腹板的局部屈曲應力。On this basis, the further research of anti - seismic of buckling restrained braced frame is performed. derive additional damping and influence of buckling restrained brace to column axis strength. example proved, as to concentrically braced frame, buckling restrained braced frame has better anti - seismic performance
在此基礎上,將此種支撐應用於框架中,對防屈曲支撐框架的抗震性能作了進一步的研究,推導了防屈曲支撐的附加阻尼比以及防屈曲支撐對柱附加軸力的影響,並且通過對一個算例進行非線性時程分析驗證了相對于普通中心支撐框架,防屈曲支撐框架具有更好的抗震性能。Elastic - plastic bending induced residual stress and its influence on tensile yield strength of plates
彈塑性彎曲所致殘余應力及其對板料拉伸屈服強度的影響The research indicate that the structured soft clay has below several characteristic, the viscous strain is produced during the stage of primary consolidation and of second consolidation, and in the prophase, the relation of stress - strain - strain rate is unique, so the form of constitutive model, such as, f ( v ', e ) = 0, f ( ' v, e, t ) = 0, ca n ' t describe strain behavior of soil skeleton rationally ; the time - dependent properties involve three aspects, in addition the time - dependent strain, apparent preconsolidation pressures that depend on strain rate, and the effect of creep compression on apparent preconsolidation pressures ; because of holding structural strength, the mechanics characteristic is determined by the magnitude of stress, and the compression curve is composed of several sections. by combining structural yield stress and it ' s characteristics with the improved time line model, a new one - dimensional elastic visco - plastic consolidation model is established
研究結果表明,結構性土的固結過程具有以下特性:主固結和次固結階段都包含有因土骨架的粘滯性移動而產生的變形,而且在正常固結階段,存在應力?應變?應變速率的唯一性, f ( _ v , e ) = 0 、 f ( _ v , e , t ) = 0形式的本構關系不足以描述土骨架的變形行為;固結壓縮過程中的時間效應包括三個方面的內容,除了應力應變關系與時間相關外,還包括粘滯性變形引起表觀前期固結壓力增加和屈服應力的應變速率效應;軟土的結構性使其力學特性與應力水平相關,壓縮曲線具有分段性。By controlling the stress value of under - lying layer less than tits structure yield stress value, a new design method to decrease composite ground settlement is suggested. and the composite foundation settlements of 12 buildings with the deep mixing cement piles is calculated, which is in good accord well with the measurement in field. second, considering the influence of well resistance, smear effect and structure breakage of thick soft clay, the equivalent calculation method is proposed
首先,結合溫州地區深厚軟土,通過對室內常規試驗結果的分析,發現軟土具有較強的結構性,並給出室內固結壓縮曲線校正的新方法;提出了通過控制未打穿水泥攪拌樁復合地基下臥層的應力水平,使其小於土體結構屈服應力,以大幅度減小沉降的復合地基設計方法,並通過與12幢住宅樓未打穿水泥攪拌樁復合地基的實測沉降對比,得到了良好的驗證,進一步完善了結構性軟土壓縮變形的計算方法。Local buckling capacity of steel composite beam subjected to combined bending, shear and patch loading is one of key problem in steel structures design. the computational formula for local stability of web was based on the assumption of infinite - elastic perfect plates in the steel structures design code ( gbj17 - 88 ). but in the revised code ( gb50017 - 2003 ), this formula was made big change with reference to british code ( bs5950, partl ) and australian code ( as4100 ), the related research result of our country was included as well. in the modified formula, influence of early geometric imperfection and elastic - plastic buckling stage were considered, which is compatible with both actual circumstance of engineering and the strength formula of beams under bending stresses ( considering partial plasticity of the section ). in this paper, the preceding problem is deeply analyzed and studied, considering the effects of various geometric parameters and stress combinations on buckling critical stress of web, the revised local buckling correlative formula for transverse and longituded stiffened web panels under combined stresses is analyzed and verified by finite element method
組合鋼梁腹板在彎、剪及局壓復合應力作用下的局部屈曲承載能力是鋼結構設計中需考慮的問題,新的《鋼結構設計規范》 ( gb50017 ? 2003 )對此部分內容作了較大改動,原規范中關于腹板局部穩定的計算公式是基於無限彈性的完善板假定;新的規范則參考了英國規范( bs5950 part1 )及澳大利亞規范( as4100 )並結合我國相關研究成果,考慮了屈曲進入彈塑性階段以及初始幾何缺陷的影響。這不僅與工程實際情況相符,而且也與鋼梁在彎曲應力作用下允許截面部分進入塑性的計算公式相協調。The use of intermediate stiffeners in the compression plate may significantly increase elastic buckling stress and ultimate capacity of the plate. however, the behavior of the plate with intermediate stiffeners would be complicated
在受壓板件中設置中間加勁肋可以顯著提高板件的彈性屈曲應力和極限承載能力,但是也使得板件的屈曲行為變得復雜。The discrete stiffener solution and orthotropic plate solution are used for analyzing the buckling behavior of intermediately stiffened plates theoretically in this paper. thus, closed - form solution of critical buckling stress and required adequate stiffening rigidity of the stiffener is obtained
本文分別用分離加勁肋法和各向異性板法對縱向中間加勁板件的屈曲性能進行了理論分析,得到了屈曲應力和理論充分加勁剛度解析表達式。( 4 ) introducing how to evaluate load capacity pn of wall stud considering post buckling strength of plate element. local buckling effects are determined according to the effective width method used in specifications gb50018 _ 2002 and aisi96
( 4 )參照gb50018 、 aisi96二本現行規范,採用有效寬度法考慮局部屈曲后強度並對非彈性屈曲應力進行修正,給出了考慮局部屈曲影響和進行非彈性修正後立柱的穩定承載能力p _ n 。The effects for buckling stress of the changes of the stiffener rigidity, shape, dimension, as well as its location are analyzed in this thesis
論文對帽形中間加勁肋的剛度、加勁肋的形狀、尺寸和位置變化對中間加勁板件屈曲應力的影響作了分析研究。It ' s we1l known that the windshield material is an organic material. it shows visco - plastic behavior which is that the stress - strain curve, the yield stress and the limited stfess varied with the material deformation rate
眾所周知,風擋材料為有機材料,一方面呈現出粘彈塑性特性,即材料的應力應變曲線、屈服應力、破壞應力都隨著材料變形速率的變化而變化。分享友人