The compression curves of soft clay of different disturbance degree finally intersect at 0 . 42eo 不同擾動度的壓縮曲線最終交于0 . 42e _ 0位置。
From the oedometer compression curves , the gradual damage course of soil structure is indicated apparently during loading 從固結(jié)儀壓縮曲線更可反映土體受荷后結(jié)構(gòu)性的漸進破壞過程。
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(jié)果表明,結(jié)構(gòu)性土的固結(jié)過程具有以下特性:主固結(jié)和次固結(jié)階段都包含有因土骨架的粘滯性移動而產(chǎn)生的變形,而且在正常固結(jié)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(gòu)關(guān)系不足以描述土骨架的變形行為;固結(jié)壓縮過程中的時間效應包括三個方面的內(nèi)容,除了應力應變關(guān)系與時間相關(guān)外,還包括粘滯性變形引起表觀前期固結(jié)壓力增加和屈服應力的應變速率效應;軟土的結(jié)構(gòu)性使其力學特性與應力水平相關(guān),壓縮曲線具有分段性。
As a result , the p - v curve of the target was a quasi - isentropic compression curve , which consisted of small hugoniot curves ( similar to isentropic curves ) from different original states , and was located betwee n the hungoniot curve and isentropic curve but closer to the latter . finally , on a two - stage light - gas gun , titanium alloy projectiles ( with mass of 0 . 35 ~ 2 . 80g ) were driven intact to hypervelocities as over 15km / s by 93w - ofc - tc4 - a1 - mb2 system flier - plate with graded wave impedance , although the fl 在二級輕氣炮上,利用93w - ofc一tc4一al一mb :系波阻抗梯度飛片成功將克量級( 0 . 35一2 . 809 )欽合金二級飛片發(fā)射到了15kln / s以上的超高速度,且二級飛片主體是完整性,但其平面性和飛行姿態(tài)還有待于今后的深入研究。