ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

The basic parameters of plant straw packaging container, such as Poisson ratio, elastic modulus and so on, were gained by means of static compression test. The mechanical model was established from the force-deformation curve, and the packaging container was also analyzed through finite element method (FEM) based upon parameters and the model above. Some parameters such as the stress distribution law, stiffness and breaking strength under compression load were obtained and the easy-crackled position was also determined. It is proved that the calculation results are in accord with the experimental results. The research is the foundation for study on crack damage of tableware and provides evidence for the structure design and mould development.