回弹是弯曲成形中普遍存在的现象，实践证明采用拉弯工艺可以有效地减小回弹，从而达到提高成形精度的目的。
Springback is a common phenomenon in bending process. It has been proved that stretch bending can decrease the springback effectively, which can improve the forming precision.
本文采用有限元模拟的方法，结合金属成形的塑性变形理论，深入分析了拉弯的成形机理，建立了用于转台式拉弯成形模拟的有限元模型。
By using finite element simulation method and plastic distortion theory, the author analyzes the principle of the stretch bending forming and builds finite element model of rotary stretch bending.
对于拉弯构件问题，本文也作了论述。
The Problem of bars subjected to axial tension and bending is also described here.
我去海外旅行的途中，为了防止琴颈被弦拉弯，经常将吉他的弦放松。
Whenever I travel overseas, I always detune the guitar and take the tension off the neck.
介绍了转台拉弯机的工作原理及控制特点，研究了其力和位移的PID控制模型。
This paper introduces the working principle and controlling characteristic and studies the PID control models of the force and displacement of the rotary Stretch-bending former.
对比了多点拉弯件的轮廓曲线和目标轮廓曲线，验证了多点拉弯成形技术的成形精度。
The shaping accuracy was validated by comparing the target of curve with the outline curve on the formed parts.
根据成形极限图和规定最大回弹超差量来调整变形模式，找到优化的变形模式和拉弯轨迹。
Deformation mode is adjusted according to forming limit diagram (FLD) and maximum springback error, so the optimized one can be found, which in turn optimizes the stretch bending trajectory.
加工项目：剪板、折弯、拉弯、卷弯、卷圆、焊接、钻孔攻牙等，客户来图来料加工服务。
Processing projects: shearing, bending, stretch bending, roll bending, roll round, welding, drilling and tapping, customer sample processing services.
在“拉弯”作用的情况下，卸载回弹后的曲率半径随着拉力的增大而单调减小，因此拉力的作用有助于减小回弹。
After unloading and resiling, the curvature radius of CT decreases monotonously along with stretch increasing. As a result, stretch is helpful to reducing resilience.
运用VC编制了通用计算程序，计算结果表明：该算法稳定，适合于各种拉弯模具外形曲线，计算效率及精度高。
Meanwhile a general calculation program has been developed with VC. The result shows that the algorithm is steady, which has high efficiency and precision, and is adaptive to convex dies.
采用数据文件插补和在线插补两种方案，解决了拉弯机位移控制中任意曲线的插补问题，实现了任意曲线轨迹的精确控制。
To solve the interpolation problem of random curve, the schemes of data file interpolation and on-line interpolation are used, which proves to be accurate.
文章运用模块化思想设计了几何仿真和物理仿真集成的数控拉弯机仿真系统，提出了拉弯过程几何仿真、碰撞检测及物理仿真的实现方法。
This paper applies the modularization thinking in designing the NC stretch bending machine simulation system, that is an integration system of geometric and physical simulation.
在混凝土中掺用钢纤维，能显著提高混凝土的抗拉、抗弯、抗剪强度。
Steel fiber mixed in concrete may obviously increase the tensile, bending and shearing strengths of the concrete.
他们在尘土飞扬的大道上拐过那个看不见塔拉农场的弯以后，布伦特勒住马，在一丛山茱萸下站住了。
When they had rounded the curve of the dusty road that hid them from Tara, Brent drew his horse to a stop under a clump of dogwood.
按照材料各自用途不同，其必须具有足够的抗拉、抗压、抗剪、抗弯或是抗扭强度。
Material should be adequately strong when subjected to tension, compression, shear, bending or torsion as per the intended use.
计算结果显示，不同细观骨料模型具有相似的规律，即随预静载增大，混凝土动弯拉强度上升，至一定峰值后回归到静载强度。
The law shows that, along with the static pre-load increasing, the dynamical bending strength of concrete would go up to a peak value and then move downward to the static strength.
机场水泥混凝土道面结构参数包括板厚、混凝土弯拉强度和弯拉弹性模量、地基反应模量。
Airport cement concrete pavement structural parameters include slab thickness, concrete bending strength elastic modulus and foundation reaction module.
这批试件的疲劳破坏形式为：折断破坏、弯拉破坏和剪压破坏。
The fatigue failure types of the beams were fracture failure, bending tensile failure and shear compression failure.
对受弯构件受拉翼缘外侧粘贴FRP后的界面剪应力和界面剥离应力进行了分析。
The interfacial shear stress and peel stress between the FRP and the surface of tension flange were analyzed when the FRP was bonded to the tension flange of the bending members.
通过典型路面结构模式的计算分析，得出柔性路面层底最大弯拉应力发生的位置，有助于简化设计过程。
Through the analyzing and calculating of representative pavement structure, it is helpful for simplifying the design process to get the maximal bend stress position of flexible pavement.
对层布式钢纤维混凝土的弯拉强度进行了试验研究，并对其增强机理做出了简要的分析。
In this paper, the flexural-tensile strength of layered steel fiber reinforced concrete was studied, and its reinforcement mechanism was analyzed briefly.
这批试件的破坏形式为：折断破坏、弯拉破坏和剪压破坏。
The failure types of the beams were broken failure, bending-tensile failure and shear-compression failure.
分析中包括了搭板的几何尺寸、材料因素、地基非均匀、枕梁及沥青加铺层对搭板弯拉应力及变形的影响。
The influence of geometric size, material properties of the slabs, inhomogeneous subgrade, sleeper beam and bituminous overlay on the bending stresses and deflection is investigated.
用本文编制的动力有限元程序可以较好的模拟三弯点梁在静态和动态冲击荷载作用下的弯拉特性。
The dynamic finite element program formulated in the paper can simulate the flexural-tensile property of the third-point flexural-tensile beams under static loading and impact loading.
研究表明在超载重载条件下高等级沥青路面结构设计中以基层底部弯拉应力为设计指标控制较为合理。
The research results show that the flexible-tensile stress under the basement is the suitable design control index for the asphalt pavement structure of expressway under overload.
棕榈藤是热带地区宝贵的非本质林产品，其柔韧、抗拉和抗弯等特点使其成为编织和制作藤制品家具的主要原料。
Rattan is valuable non - wood product in tropical areas, it has characters of pliable and tough, bending resistance, is main material of weaving and furniture making.
介绍了高流态自密实砼的性能、配合比设计方法及其在中等强度等级预应力受弯拉砼构件中的应用试验及测试情况。
This paper introduced the characteristics of high dense fluid concrete, design of batching ratio, the experiment and test of bent concrete component in medium hardness prestress.
本文主要研究钢筋混凝土轴心受拉和受弯等构件中两根主生裂缝之间的钢筋与混凝土的结合(过去常称为粘结或握裹)与滑移关系。
The bond and slip relationship between the rebar and the concrete within a segment bounded by two primary cracks in a reinforced concrete tension member or a flexural member is studied.
玻璃纤维增强水泥(GRC)具有抗拉、抗弯、抗冲击、重量轻等多种优点。
The glass fiber reinforced cement GRC has several advantages such as good tensile strength, good bending strength, good shock strength and light weight.
玻璃纤维增强水泥(GRC)具有抗拉、抗弯、抗冲击、重量轻等多种优点。
The glass fiber reinforced cement GRC has several advantages such as good tensile strength, good bending strength, good shock strength and light weight.
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