Further study on the dynamic loading transmission in cellular solids based on one-dimensional mass-spring model

被引：3
|
作者：
Xi, C. Q. [1 ]
Dai, Z. J. [1 ]
Li, Q. M. [2 ]
机构：
[1] Beijing Inst Technol, Sch Mechatron Engn, Beijing 100081, Peoples R China
[2] Univ Manchester, Dept Mech Aerosp & Civil Engn, Manchester M13 9PL, England
来源：
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | 2023年 / 171卷
关键词：
Cellular solids; Deformation-contact process; 1D deformation-contact mass-spring model; STRAIN-RATE; ALUMINUM FOAMS; MECHANICAL-PROPERTIES; COMPRESSIVE BEHAVIOR; METALLIC FOAMS; II STRUCTURES; PART II; PROPAGATION; DENSITY;
D O I：
10.1016/j.ijimpeng.2022.104389
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The characteristics of dynamic loading transmission in cellular solids are studied in the present paper using a one-dimensional (1D) deformation-contact mass-spring model. From the perspective of deformation process, the collisions among adjacent cell walls happen due to the shock-induced localized large deformation and the cellular structure of the material. Two springs representing deformation stress and contact stress, respectively, are introduced to the mass-spring model to represent different deformation and loading transmission mecha-nisms. Combined with shock-wave model, the contact stress in the densification stage is determined. Both quasi -static and dynamic compression of cellular solids can be described by the 1D mass-spring model, in which the critical impact velocity of the compaction shock is used to distinguish two different compression states. Based on the 1D deformation-contact mass-spring model, several important issues in the dynamic loading transmission in cellular solids, i.e. the deformation-contact process, unloading and reversed loading issue, deformation modes under different loading conditions, stress effectiveness and micro-inertia effect, are examined. The present paper clarifies previous concerns on the mass-spring model and demonstrates its enhanced capability to simulate the dynamic loading transmission in cellular solids.
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页数：12
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