Then, normal contact stiffness and shear contact stiffness of sand particles are derived according to researches above.
在砂土颗粒接触模型的基础上推导出砂土颗粒法向接触刚度、切向接触刚度的表达式。
Conclusions:There is a normal contact area between the inner surface of lateral femoral tendon and lateral femur condylar to reduce the contact pressure of the lateral surface of patella.
结论：①在正常情况下股外侧肌腱内面与股骨外侧髁存在着接触，这可能是缓解髌骨外侧关节软骨面压力的正常接触；
Conclusions:There is a normal contact area between the inner surface of lateral femoral tendon and lateral femur condylar to reduce the contact pressure of the lateral surface of patella.
结论：①在正常情况下股外侧肌腱内面与股骨外侧髁存在着接触，这可能是缓解髌骨外侧关节软骨面压力的正常接触；
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