CAJ | 학술논문

针对典型泡沫结构应力-应变曲线的线弹性区、屈服平台区及压实区构成特点，建立了泡沫结构的有效简化本构关系。依据功能梯度泡沫结构的特征，建立了此缓冲结构动力学模型。运用 Runge -Kutta 法分析了梯度函数、密度差和冲击输入能量对功能梯度泡沫结构的响应影响，并与均匀泡沫结构的响应进行了比较。结果表明：梯度泡沫结构对小得冲击输入能量载荷作用时比较有利，克服了均匀泡沫系统对一定冲击能量范围响应几乎不变化的特点，此结果为拓展泡沫结构材料的使用范围提供参考。
침대전형포말결구응력-응변곡선적선탄성구、굴복평태구급압실구구성특점，건립료포말결구적유효간화본구관계。의거공능제도포말결구적특정，건립료차완충결구동역학모형。운용 Runge -Kutta 법분석료제도함수、밀도차화충격수입능량대공능제도포말결구적향응영향，병여균균포말결구적향응진행료비교。결과표명：제도포말결구대소득충격수입능량재하작용시비교유리，극복료균균포말계통대일정충격능량범위향응궤호불변화적특점，차결과위탁전포말결구재료적사용범위제공삼고。
Based on characteristics of linear elastic zone,yield plateau and densification one for the stress-strain curve of a typical foam structure,an effective and simplified constitutive relationship of the foam structure was proposed. Then,a functionally graded foam sturcture was introduced,and the dynamic model of this cushioning structure was built. The effects of gradient function,density difference,and shock input energy on the impact response of the functionally graded foam structure were analyzed with Runge-Kutta method.The results revealed that a functionally graded foam structure is efficient to smaller shock input energy conditions.The study results provided a reference for extending the application range of foam structure materials.