{"title":"爆炸对基于密度的三层聚氨酯泡沫的影响","authors":"","doi":"10.1016/j.ijimpeng.2024.105108","DOIUrl":null,"url":null,"abstract":"<div><p>Cellular solids are interesting materials for blast energy absorption because of their high porosity, cell structure, and unique mechanical properties. Also, it will undergo graded compression over the same foam density. Hence, in this study, an experimental investigation of blast pressure impact on the trilayered sequences made of three different polyurethane (PU) foam densities of equal thickness, such as D1-29.201 kg/m<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span>, D2-59.692 kg/m<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span>, and D3-107.720 kg/m<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span> is carried out. The force transmitted <span><math><mrow><mo>(</mo><msub><mrow><mi>F</mi></mrow><mrow><mi>T</mi></mrow></msub><mo>)</mo></mrow></math></span> on the reaction plate and incident force on the blast impact face are recorded. The maximum force amplification <span><math><mrow><mo>(</mo><msub><mrow><mi>F</mi></mrow><mrow><mi>a</mi><mi>m</mi><mi>p</mi></mrow></msub><mo>)</mo></mrow></math></span> of the 63.79% was observed in the S5 and the minimum of 6.19% in S4. Thus the reduction in <span><math><msub><mrow><mi>F</mi></mrow><mrow><mi>a</mi><mi>m</mi><mi>p</mi></mrow></msub></math></span> in S4 compared to S5 is 90.3%. Similarly, the energy absorbed <span><math><mrow><mo>(</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>a</mi><mi>b</mi><mi>s</mi></mrow></msub><mo>)</mo></mrow></math></span> by the trilayer is a maximum of 24.80 J in S2 and a minimum of 3.60 J in S3. The <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>a</mi><mi>b</mi><mi>s</mi></mrow></msub></math></span> increased to 85.48% in S2 solely by altering the layer sequences in S3. Hence, the location of the density in the layer sequences plays a key role in effective blast mitigation on different response measures.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0734743X24002331/pdfft?md5=f7c26cbc6f47a0b49f954fe8cb10d7ff&pid=1-s2.0-S0734743X24002331-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Blast impact on the density-based tri-layered polyurethane foam\",\"authors\":\"\",\"doi\":\"10.1016/j.ijimpeng.2024.105108\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Cellular solids are interesting materials for blast energy absorption because of their high porosity, cell structure, and unique mechanical properties. Also, it will undergo graded compression over the same foam density. Hence, in this study, an experimental investigation of blast pressure impact on the trilayered sequences made of three different polyurethane (PU) foam densities of equal thickness, such as D1-29.201 kg/m<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span>, D2-59.692 kg/m<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span>, and D3-107.720 kg/m<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span> is carried out. The force transmitted <span><math><mrow><mo>(</mo><msub><mrow><mi>F</mi></mrow><mrow><mi>T</mi></mrow></msub><mo>)</mo></mrow></math></span> on the reaction plate and incident force on the blast impact face are recorded. The maximum force amplification <span><math><mrow><mo>(</mo><msub><mrow><mi>F</mi></mrow><mrow><mi>a</mi><mi>m</mi><mi>p</mi></mrow></msub><mo>)</mo></mrow></math></span> of the 63.79% was observed in the S5 and the minimum of 6.19% in S4. Thus the reduction in <span><math><msub><mrow><mi>F</mi></mrow><mrow><mi>a</mi><mi>m</mi><mi>p</mi></mrow></msub></math></span> in S4 compared to S5 is 90.3%. Similarly, the energy absorbed <span><math><mrow><mo>(</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>a</mi><mi>b</mi><mi>s</mi></mrow></msub><mo>)</mo></mrow></math></span> by the trilayer is a maximum of 24.80 J in S2 and a minimum of 3.60 J in S3. The <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>a</mi><mi>b</mi><mi>s</mi></mrow></msub></math></span> increased to 85.48% in S2 solely by altering the layer sequences in S3. Hence, the location of the density in the layer sequences plays a key role in effective blast mitigation on different response measures.</p></div>\",\"PeriodicalId\":50318,\"journal\":{\"name\":\"International Journal of Impact Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2024-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0734743X24002331/pdfft?md5=f7c26cbc6f47a0b49f954fe8cb10d7ff&pid=1-s2.0-S0734743X24002331-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Impact Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0734743X24002331\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Impact Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0734743X24002331","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Blast impact on the density-based tri-layered polyurethane foam
Cellular solids are interesting materials for blast energy absorption because of their high porosity, cell structure, and unique mechanical properties. Also, it will undergo graded compression over the same foam density. Hence, in this study, an experimental investigation of blast pressure impact on the trilayered sequences made of three different polyurethane (PU) foam densities of equal thickness, such as D1-29.201 kg/m, D2-59.692 kg/m, and D3-107.720 kg/m is carried out. The force transmitted on the reaction plate and incident force on the blast impact face are recorded. The maximum force amplification of the 63.79% was observed in the S5 and the minimum of 6.19% in S4. Thus the reduction in in S4 compared to S5 is 90.3%. Similarly, the energy absorbed by the trilayer is a maximum of 24.80 J in S2 and a minimum of 3.60 J in S3. The increased to 85.48% in S2 solely by altering the layer sequences in S3. Hence, the location of the density in the layer sequences plays a key role in effective blast mitigation on different response measures.
期刊介绍:
The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them:
-Behaviour and failure of structures and materials under impact and blast loading
-Systems for protection and absorption of impact and blast loading
-Terminal ballistics
-Dynamic behaviour and failure of materials including plasticity and fracture
-Stress waves
-Structural crashworthiness
-High-rate mechanical and forming processes
-Impact, blast and high-rate loading/measurement techniques and their applications