本文采用了数值计算、室内试验及理论分析的方法开展了常规力学性能试验主应力组成方式和疲劳荷载寿命的研究。利用数值计算的方法开展了以弹性体为模型的各项常规力学仿真试验计算，验证了单轴贯入、双轴贯入、巴西劈裂、纯剪、马歇尔稳定度试验中试件最危险的位置，并得到施加的力的大小与该位置的主应力的关系曲线和该位置受力的主应力组成方式；结合室内试验资料的方法搜集了以重塑黄土为研究对象的单轴贯入、双轴贯入、巴西劈裂、纯剪、马歇尔稳定度试验等常规力学试验，根据数值计算得到的施加的力与最危险位置主应力的关系曲线，对室内试验测试结果进行处理分析，得到室内试验实际主应力组成方式；理论分析以上结果，根据莫尔-库伦准则作出相应五项力学试验的莫尔圆，并通过屈服系数判定试验过程中试件最危险的位置；利用数值计算和理论分析，对试件受不同主应力组成方式下的疲劳寿命进行仿真计算，并验证不同的主应力组成方式对试件疲劳寿命有一定的影响。

Adaped by the numerical calculation, theoretical analysis and laboratory tests, stress composition form based on conventional mechanical testing and fatigue load life are studied in this paper. Simulation calculation are conducted to develope the routine mechanics by the elastomer model , which was verified the most dangerous location by uniaxial penetration test, double punch test, Brazilian split test, pure shear, Marshall stability tests ,the principal stress curves and the composition of the principal stress in that position. Combined data collected indoor test by reshaping loess, uniaxial penetration, double punch test, Brazilian split test, pure shear, Marshall stability tests are collected. According to results from numerical methods, actual composition of the principal stress in door test are gotten by analyzing indoor test results. Though analyizing the above results, Mohr circle is made by five corresponding mechanics tests according to Mohr-Coulomb criterion and Drucker-Prager criterion. Most dangerous position in the process of testsand is determind. Though numerical calculation and theoretical analysis, simulation for fatigue life is calculated in different composition of the principal stress. Certain influences on the different composition of the principal stress for the fatigue life of the specimen are verified .