1) damage theory of Najar
Najar损伤理论
1.
A concrete damage model for triaxail stress state concrete is proposed based on damage theory of Najar in the paper, and damage characteristics of concrete are also investigated.
重点从能量耗散的角度,基于Najar损伤理论,结合Saenz提出的典型混凝土单轴受压应力-应变关系和现行《混凝土结构设计规范》(GB50010-2002)推荐的单轴受拉应力-应变关系建立了混凝土单轴受压、受拉损伤模型。
2.
Then a composite damage variable D is defined based on the damage theory of Najar,and a damage model for concrete under multiaxial loading patterns is proposed.
根据Najar损伤理论,定义了综合损伤变量D,从能量耗散的角度提出一种用于多轴应力状态下的混凝土损伤模型。
2) damage theory
损伤理论
1.
Comparison of embedding types used in sheet-metal spiral case using damage theory;
基于损伤理论的金属蜗壳埋设方式比较
2.
The pitting corrosion damage of pipeline was considered as uniform hole-type damage based on the damage theory.
基于损伤理论,将管壁点腐蚀损伤层材料视作孔洞型均匀损伤材料,通过模拟多孔材料拉伸实验,研究了孔洞型损伤管线钢表观弹性模量和屈服强度退化规律。
3.
Based on damage theory,residual strength assessment formula has been developed by modifying API RP 579 formula for volumetric flaw evaluation.
基于损伤理论,将用于评价体积型缺陷的API RP 579公式进行了改进,建立了点腐蚀损伤管道的剩余强度评价公式。
4) Damage-repair theory
损伤修复理论
5) statistical damage theory
统计损伤理论
1.
Secondly,making use of statistical damage theory,a statistical damage evolution equation that reflects the full process of rock failure has been developed.
首先将在应力作用下的岩石材料抽象为破坏与未破坏两部分,并根据这两部分不同的受力情况,通过引进岩石材料屈服或破坏的能量原理,建立岩石损伤模型;其次,利用统计损伤理论,建立能够反映岩石破裂全过程的统计损伤演化方程,进而建立特定围压下的岩石损伤统计本构模型;最后,通过探讨模型参数与围压的经验关系,对模型进行合理修正,从而建立出反映不同围压条件下的岩石破裂全过程的统一三维损伤统计本构模型。
2.
Aiming at some restricts and deficiencies of strain-equivalence hypothesis of Lemaitre and through introducing a statistical damage theory,a new statistical damage constitutive model was established based on the curves obtained from tri-axial tests,which could reflect mutual conversion for brittle and ductile properties of rock.
针对Lemaitre应变等价性假说的局限性与不足,通过引进统计损伤理论,基于岩石三轴试验曲线,建立了能够反映脆延特性及其相互转化特征的岩石损伤统计本构模型。
6) mechanical damage theory
机械损伤理论
补充资料：NA
内次甲基四氢邻苯二甲酸酐又称甲撑邻苯二甲酸酐，简称NA，分子量164。白色结晶，熔点162～167℃。
有潮解性。易溶于苯、甲苯、丙酮，受热升华，能与水反应成酸。 用作环氧树酯固化剂、硬化玻璃固化剂、橡胶软化剂的中间体、塑料钢丝塘瓷及树酯等表面治化剂、高沸点溶剂、合成润滑剂、纺织整理渗透剂等。
用作环氧树脂的固化剂，参考用量75～95phr，固化条件120℃／2h十150℃／5h或80 ℃／3h十120℃／3h十200 ℃／4h。固化物具有优良的耐热性、耐候性和电性能，耐热200 ℃以上。
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参考词条