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扭转试验能够客观地反映材料(脆性或塑性)的各种机械性能指标,是测试金属机械性能的重要方法之一。飞机k有许多属于产生扭转变形的构件,如发动机的转动轴、承载的卷弹簧、螺旋桨等。设计这些构件时所选用的材料,必须测出扭转时的各种机械性能数字指标(G、τ、τ_(0·3)、τ_b、t_K),提供于算构件强度的准确数值,才能使设计的构件安全可靠。用千分表扭角计测定扭转机械性能时比用马腾式光学引伸计效率高。现将测试情况介绍如下。 一、试验材料、机器和仪器 试验所用材料列入表1;所用机器为K-50型扭转试验机(选用50公斤-米表盘);试样受扭时用的测量仪器——千分表及扭角的测定如图1、2。
Torsion tests objectively reflect various mechanical properties of materials (brittle or ductile) and are one of the important methods for testing the mechanical properties of metals. There are many aircraft k belonging to torsional deformation of the components, such as the engine’s rotating shaft, bearing the volume of the spring, propeller and so on. The materials used in the design of these components must be measured to determine the numerical indicators (G, τ, τ_ (0 · 3), τ_b, t_K) of the various mechanical properties of the torsional moment The components are safe and reliable. Using a dial indicator to determine the torsional mechanical properties is better than using a mate-style optical extensometer. Now test the situation described below. First, the test materials, machinery and equipment used in the test materials listed in Table 1; the machine used for the K-50-type torsion testing machine (optional 50 kg - meter dial); specimen torsion when used measuring instruments - dial indicator and Torsion determination as shown in Figure 1,2.