At the same time , the energy absorbed in the crack propagation phase decreases relatively that lead to overall energy absorption of the composites increases slightly , it is greater than 12 . 89 % . by observing the appearance of the damage area , it can be found that the mode of damage is influenced by the interfacial shear strength . if the interfacial shear strength is low , fiber pull - out is the primary energy - absorbing mechanisms , whereas the dominant energy - absorbing mechanisms changes into fiber / matrix debonding and delamination when the interfacial shear strength is stronger 界面剪切强度增加后，材料的冲击极限载荷有所增加，在裂纹起始区吸收的引发能增加较多，其中增强纤维经等离子体处理6分钟的试样所吸收的引发能增加了18 . 57 % ;由于裂纹扩展阶段所吸收的能量相对有所下降，材料总的能量吸收能力虽有所改善，但增加不多，其中界面剪切强度增加最多的试样，吸收的总能量增加了12 . 89 % 。
The results showed that yielding the strength increase with the strain rate , the energy absorption increase with increasing strain rate and was related to the density . strain has slightly effect on the strain rate sensitivity of the solid material , but the strain rate sensitivity of fs increase with increasing true strain and also increase with incremental change in strain rate at the same true strain . the properties of thermal conductivity , electrical conductivity and electromagnetic shielding were studied 实验结果表明，泡沫铝的屈服强度随着应变率的增加而增加；应变对固体材料的应变率敏感度影响很小，但是泡沫铝的应变率敏感度不是常数，而是随着真应变的增加而增大，在同样的应变下，随着应变率变化幅度的增大而增大；泡沫铝的能量吸收随着应变率的增加而增加并且和泡沫铝的密度有关；泡沫铝的吸能效率随着应变率的增加略有下降。
As one of new composite structures in the field of civil engineering , concrete - filled rectangular steel tubular ( cfrt ) structure has high capacity , large energy absorption capacity , and high ductility , also it has regular shape which is easy to connect between columns and beams , convenient fire - control measure , and short construction time 方钢管混凝土结构作为一种新型组合结构，具有承载力高、耗能能力强、延性好等特点，且外形规则便于梁柱连接，防火措施简单，施工周期短，因此，在中高层住宅建筑中有较广泛的应用前景。
Steel frame with welding joint easily occur brittle collapse because of having a low ductility at joints . then , a semi - rigid connected steel frame has large the energy absorption capacity which can resist dynamic loads and the using steel qualities of bracing system and joints are small . so adopting a semi - rigid jointed steel frame is economical and stable 采用焊接刚性节点的钢框架因节点延性较差容易发生脆性破坏，而半刚接钢框架因节点具有较强的耗能能力可以抵抗一定的地震荷载，同时还可以减少斜撑的数量及节点用钢量，这使得半刚接钢框架成为一种经济、可靠的选择。
