In order to remove the reflective crack of asphalt overlay on cement concrete pavement, the paper adopted finite element method, took pavement structure as elastic layered system, founded a three-dimensional model of asphalt overlay, strengthening layer, cracked slab of cement concrete pavement and subgrade, and analyzed the influences of old cement concrete cracked size, temperature drop scope, modulus and thickness of asphalt overlay, structure strengthening layer modulus and thickness of cement concrete cracked slab on asphalt overlay thermal stress.
为了防止水泥混凝土路面加铺沥青面层反射裂缝的产生，采用有限元方法，视路面结构为弹性层状体系，建立沥青加铺层、补强层、破裂水泥混凝土路面板和地基组成的空间三维模型，分析了破裂板块平面尺寸、降温幅度、沥青加铺层模量及厚度、结构补强层模量、混凝土路面板厚度等因素对沥青加铺层温度应力的影响。
According to the principle of residual stress generation in grinding tooth, the mathematical models of basic parameters, force and thermal parameters of grinding tooth of spiral bevel gear were obtained by applying the thermo-elastic-plastic theory.
根据磨齿残余应力的产生机理，运用热弹塑性理论，得出了影响螺旋锥齿轮磨齿残余应力的磨齿基本参数、磨削力和磨齿热等特征参量的数学模型。
Based on thermal elastic-plastic theory the simulation of welding stress strain field was carried out in this paper, and the finite element model was established with contact element on the basis of contact theory, the contact mechanical behavior and the effect of hammer peening were calculated and analysed.
本文基于热弹塑性理论对焊接应力应变场进行了模拟分析，在接触理论的基础上，采用接触单元技术建立冲击一接触问题的有限元模型，计算分析冲击接触的力学行为与锤击消应力效果。
In this article, according to heat conduction theory, elastic creep theory and finite element theory, the temperature field and thermal-creep-stress field programs are compiled.
本文根据热传导理论、弹性徐变理论及有限元理论编制了三维徐变温度应力场计算程序。
In this paper, based on the knowledge about the change in the microstructures and mechaniacal properties of the cast irons with the influence of temperature, stress and thermo—mechanical circulated load in working cycle of ingot mould, the temperature and stress fields have been analysed by means of thermo-elastic-plastic finitive element, and futher, the behavior of thermal stress factors in every working cycle of the mould have been investigated, by which principles for optimum design of ingot mould's structure has been put out.
本文以钢锭模一个使用周期内的温度场、应力场及热一力循环载荷作用下铸铁的组织结构和力学性能的变化规律为基础。利用热弹塑性有限元法对钢锭模使用过程中的温度场及应力场进行了分析，并进一步研究了钢锭模在每个使用周期间的热应力参数的变化规律，提出了钢锭模结构优化设计的基本原则。
Incurrent research, aiming at the rupture problem engendered in the shooting process of acertain 5.56mm automatic rifle, the strain and stress distributions on the cartridge caseunder the action of axial pull have been analyzed. Based on the theories of elastic-plasticmechanics and contact mechanics, a mathematic and physical model of the cartridge-caseand chamber system has been set up; and based on the platform of the general softwarepackage APDL of ANSYS for finite element analysis, a parameterized model of thecartridge-case and chamber system has also been established. The method for nonlinearFEA has been adopted to analyze the stress distribution on the entire cartridge-case andchamber system, and the method of contact element has been employed to investigate thecontact stress between the cartridge case and chamber, and then the influences of frictioncoefficient and locking space on the static and dynamic stress and strain response of thecartridge case and chamber to the action of power gas have also been discussed. On thebasis of a lot of numerical tests, a kind of element Plane13, which is concentrated incoupled computation of heat and construction, has been used finally to simulate thetransient response of the cartridge-case and chamber system to the power gas. Throughloading the temporary thermal characteristics of explosive gas in the procedure of emulate, the corresponding transient thermal stress distributed on the entire system under thecombined load of transient thermal stress and transient pressure has been obtained. Owingto these comprehensive considerations, the numerical results obtained in this paperrepresent the actual situations comparatively exactly.
本文针对某5.56mm自动步枪在工作中出现断壳的问题，分析了弹壳在轴向拉力作用下的应力应变；基于弹塑性力学及接触理论，建立了弹壳弹膛系统的数学、物理学模型，在通用有限元ANSYS软件的参数化建模工具APDL平台上，建立了弹壳弹膛系统的参数化模型；采用非线性有限元法计算了弹壳弹膛系统的整体应力，引入接触单元法分析弹壳和弹膛的接触压力，探讨了在不同的摩擦系数和不同的闭锁间隙对弹壳弹膛静、动态响应的影响；本文进行了大量的尝试，最后确定采用热、结构耦合单元Plane13，在计算中加载了火药气体的温度历程，成功的获得了弹壳弹膛系统在瞬态的热载荷和瞬态的压力载荷同时作用下弹壳弹膛系统的热应力数值解，考虑因素全面，比较真实的反映了弹壳弹膛系统在火药气体压力和热载荷下作用的情况。
In the program, the effect of lamination placement, construction interval, elastic modulus change, thermal insulation change, surrounding temperature change, concrete creep and autogenous volume change on thermal stress are considered. And such temperature control measurement as water pipe cooling, heat preservation of the dam surface, the pouring temperature control, the overflow across the dam top during flood season can also be simulated by numerical method.
该程序在编制过程中考虑了混凝土分层浇筑、施工间歇、弹模变化、绝热温升过程、环境温度的变化、混凝土徐变、自生体积变形等因素对坝体温度场及温度应力场的影响，同时也考虑了水管冷却、坝体表面保温、控制浇筑温度、施工汛期坝顶面过水等各种温控措施的数值模拟。
In this paper, author's research starts from the thermal expansivity and thermal transmission theory in physics, then utilizes the thermo elastic theory in mechanics of elastic bodies and the solution of statically indeterminate system in mechanics of materials as well as the interaction principle between soil and elastic body, finally gets the correct thermal stress analysis formulae of shaft-wall.
长期以来，在基岩段井壁结构的设计中，一直将地压作为结构设计的影响因素，实际上是不完善的；对于煤矿的进风井，井壁的温度随季节而变，因此，温度因素同样的应该考虑到井壁结构的设计中去；因此，将遗漏的因素补充入传统的设计理论中，是目前十分紧要的一项研究工作。
Key words: thermal stresses; simulate calculation; adiabatic temperature rise; elastic modulus; residual thermal stress; FEM
关键 词：温度应力；仿真计算；绝热温升；弹性模量；残余温度应力；有限元法
There are many parameters affecting on arch dam thermal stress field. By use of 3D finite element method simulating the whole process of concrete construction, the effects of some parameters (adiabatic temperature rise, elastic modulus and residual thermal stress before sealing dam slot) on arch dam thermal stress field are analyzed.
影响坝体温度场及温度应力的参数很多，通过全过程模拟混凝土拱坝施工过程，采用三维有限元法计算分析了混凝土绝热温升、弹性模量及封拱前残余温度应力对坝体温度及应力的影响。
Creep stress is a key part of temperature stress. In the course of computation of thermal-creep-stress, elastic modulus of concrete is related to the age of concrete; creep of concrete not only is related to the age of concrete, but also loading duration and the relation is complex.
徐变应力是温度应力的重要组成部分，在温度徐变应力计算过程中，混凝土的弹性模量与加载龄期有关，混凝土的徐变度不但与加载龄期有关，还与持荷时间有关，而且关系相当复杂。
By integrating easing, cement sheath and formation stone into a unified body, a tri一axial model on elastic thermal stresses was established with the effects of temperature on casing properties, such as Young`s modulus, yield stress and coefficient of thermal expansion considered.
整合容位。水泥鞘，形成石成一体，这就形成了一个三轴模型，被弹性热应力套管的性质影响，如弹性模量、屈服应力和考虑到的强度低热膨胀。
Furthermore, the above model is further developed to study the effects of thermal residual stress on the deformation behavior under tensile and compressive loadings. The residual stress and the stress distributions under tensile and compressive loadings are calculated. And the expressions for MMCs elastic modulus and yield strength in tension and compression are derived.
此外，进一步发展了上述变形模型，研究了热残留应力对复合材料拉伸和压缩行为的影响，计算了残留应力分布及在拉伸和压缩载荷作用下的应力分布，推导出了拉伸和压缩弹性模量和屈服强度的表达式。
The study results are concluded as follows: The change of adiabatic temperature rise has very great influence on the temperature of the dam in early stage; elastic modulus and thermal stress are a linear relationship; in consideration of residual thermal stress before sealing dam slot, the calculated stress data are more than the synthesis stresses calculated according to the arch dam specification.
研究结果表明：绝热温升的变化对坝体早期最高温度有很大的影响作用；弹性模量与温度应力基本上成线性关系；考虑施工期温度残余应力后，所计算的各项应力指标总体上比按拱坝规范算法计算的坝体运行期综合应力偏大。
Based on the generalizedvariational principle, the structural shape optimization sensitivity analysis for thermal stress and thermal buckling is achieved, in which the influences of structural plastic deformation, temperature field coupled material attributes, movements of boundary conditions of thermal structure according tothe alteration of structural geometric model, together with structural elastic deformation, are all considered.
基于广义变分原理建立结构热弹塑性应力和热弹塑性屈曲的形状优化灵敏度数学模型，在模型中除了结构弹性变形还考虑了非稳态温度场和机械荷载联合作用下的结构塑性变形、材料性质参数与温度场耦合的热应力响应、随结构可动几何边界更新的力学和温度场边界条件对结构响应的影响。
Under the action of high temperature in fire, prestressed steel reinforced concrete members will form a section temperature field which is obviously gradient, the elastic modulus of the material will be re reduced, the component will have a greater thermal stress and deformation.
在火灾高温作用下，预应力型钢混凝土构件将形成一个截面存在明显梯度的温度场，材料的弹性模量降低，构件将产生较大的温度应力及变形。
The thermal-elastic stress analysis of high pressure turbine plate
高压涡轮盘的热弹性应力分析
Thermal stress in meteoroids by aerodynamic heating is calculated for the ideal case of an isotropic, homogeneous, elastic sphere being heated at the surface with a constant heat transfer coefficient.
对在一个各向同性、均匀的弹性球的具有恒定的热传导系数的球面上进行加热这一理想情况下，计算了陨星由于空气动力学加热而产生的热应力。
Flexible slot provides a free expansion of space for rotor flexible thermal expansion. The thermal stress in elastic slot is released to reduce the regulation of stress-class roots.
弹性槽为转子热胀时提供了自由膨胀空间，热应力在弹性槽处得到释放，从而减小调节级根部应力。
Based on the real engineering problem, this paper tries to investigate its stress response and temperature response when the thick wall cylinder endures thermal punch; gives out the basic thermal-elastic mechanics equation and heat-conduction equation.
本文在实际工程基础上，对热冲击作用下的厚壁圆筒的应力响应和温度响应进行了研究，给出了热弹性力学的基本方程和热传导方程。