The principle of the ultrasonic method applied to measure elastic coefficient is by measuring the velocity of ultrasonic wave propagation in the solid material to obtain the elastic module , shear modulus and poisson ratio 摘要弹性系数的超声检测，即借助固体弹性常数与超声波波速间的固有关系，通过测量纵波及横波在固体中的传播速度来获取材料的弹性模量、剪切模量及泊松比。
Although no regular relationship between the modulus and v existed , it still could be shown that the good auxetic properties did exist in the polyolefin blends whose modulus differential was in the range from 800 to 1000 mpa between two phases 模量研究结果表明组分的模量组成与共混体系的泊松比值并无有规律性的联系，但两相模量差在800一io00mpa范围内体系呈现很好的负泊松比效应。
The longitudinal young ' s modulus and the in - plane shear modulus decrease with the increase of the maximum misalignment and the distortion width , but the transverse young ' s modulus and main poisson ' s ratio have no obvious change 研究了不同的最大纤维偏转角和变形区宽度对层合板弹性常数的影响，发现随着和的增加纵向弹性模量和面内剪切模量逐渐降低，横向弹性模量和主泊松比变化不明显。
The main reason is that the distributation scale and quantity of the previous grand stress imported as the given factors are usually not definite , meanwhile the different quantity of the strate parameter such as e and n are radom to the different zone 其中最主要的原因是作为已知量输入的初始地应力分布规模和量值经常不明确，同时弹性模量、泊松比等地层参数的不同取值对不同地带具有一定的任意性。
Taking into account the variation of the elastic modulus and poisson - ratio of granite with temperature , the finite element analysis software ansys was used to study the thermal stress field of underground disposal repository of nuclear waste under different temperatures 摘要在考虑了花岗岩弹性模量和泊松比随温度变化的基础上，利用有限元软件ansys对核废料处置库在不同温度下的温度应力场进行研究。
( 4 ) the fundamental principles of fiber digital holographic interferometry is presented . based on this , the poisson ' s ratio of material , the deformation of a metal plate and the temperature distributing arounding a electric iron are successfully measured ( 4 )运用数字全息干涉术测量了金属板在外力作用下的形变，观察了电烙铁头周围温度场的分布，同时探讨了利用光纤数字全息干涉术测量材料泊松比的可行性。
The results indicated that the physical properties of these materials were mainly dependent on the content of ni3al and increased obviously when 40vol % ni3al was contained since a net structure between ni3al phase and tic grains were formed under the circumstances 显微结构观察发现，在40vol ni _ 3al的组成上， ni _ 3al相与tic颗粒成为一种相互穿插的空间网络结构，使其杨氏模量、泊松比、热膨胀率都表现出明显的上升现象。
Since in most rock samples poisson ' s ratio is very markedly anisotropic , some even greater than 30 % when the effect of microcracks is eliminated , the anisotopy of poisson ' s ratio must be considered when using poisson ' s ratio to inverse the crustal structure 由于泊松比也表现出很强的各向异性，在排除微裂隙的影响后有的仍可以达到30 %以上，在利用实际地震波传播数据通过泊松比反演地下物质结构时必须考虑其各向异性的影响。
( 5 ) for slope safety problem , the paper analyzed the sensitivity of parameter . the result shows that e , v , , k0 have little affecting on slope safety , friction angle and cohness c are main factors . providing a theoretics gist for reinforcing bank 结果表明，弹性模量e 、泊松比、剪胀角和侧压力系数_ 0对边坡的安全系数影响不大，影响边坡安全系数的土体参数主要为内摩擦角和内粘聚力c ，为边坡稳定的治理提供了理论依据。
The v was tested by yjy stress transducer with mvad card by the methods of recording the deformation in the wideness and thickness direction of the specimens during the tensile test . a stable auxetic polyolefin blend with the minimal value - 1 . 4 was observed after repeated test 采用附有mvad通道卡的yjy型片式传感器，记录试样在拉伸过程中宽度和厚度方向的形变并根据泊松比的定义进行计算，反复实验后获得最小值为- 1 . 4的负泊松比烯烃共混体系。
