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研究了在某类光敏液晶高弹体中新近发现的光机械效应.对这类液晶高弹体,其材料参数,诸如杨氏模量、光致应变,在光照下都将变得不均匀,这种材料可称之为光致功能梯度材料.得到了材料参数随空间位置以及时间变化的解析表达式,在一定条件下,可将表达式近似简化为指数关系式.作为一个例子,研究了梁的光致弯曲问题,发现存在两个中性面,沿着梁厚方向,上下部分受拉应力,而中间部分受压应力.
The recent discovery of photomechanical effects in certain types of photosensitive liquid crystal elastomers has been studied, and material parameters such as Young’s modulus, photo-induced strain, in the case of such liquid-crystal elastomers, will become non-uniform under illumination, This kind of material can be called as a photogravure gradient material, and the analytic expression of material parameters with space position and time change is obtained. Under certain conditions, the expression can be approximately reduced to an exponential relationship. As an example, Beam light induced bending problems, found that there are two neutral surface, along the beam thickness direction, the upper and lower part of the tensile stress, while the middle part of the compressive stress.