本文選題：碳纖維復(fù)合材料層合板 + 落錘沖擊　； 參考：《東華大學(xué)》2015年碩士論文

【摘要】：節(jié)能環(huán)保和安全舒適是汽車工業(yè)未來(lái)發(fā)展的趨勢(shì)。為了減輕汽車質(zhì)量，減少油耗和環(huán)境污染，碳纖維增強(qiáng)樹(shù)脂基復(fù)合材料越來(lái)越受到關(guān)注。碳纖維復(fù)合材料具有輕質(zhì)高強(qiáng)、可設(shè)計(jì)性強(qiáng)、耐沖擊等優(yōu)點(diǎn)，并擁有良好的減震性能和較長(zhǎng)的使用壽命，因此已經(jīng)作為卡車、客車、轎車的外覆蓋件和結(jié)構(gòu)件應(yīng)用于汽車工業(yè)。層合板是復(fù)合材料應(yīng)用最廣泛的結(jié)構(gòu)之一，在制造、安裝、維修和使用的過(guò)程中，層合板結(jié)構(gòu)不可避免地會(huì)受到外部沖擊，并受到損傷甚至破壞，特別是應(yīng)用于汽車發(fā)動(dòng)機(jī)罩上時(shí)，按照相關(guān)行人保護(hù)法規(guī)的規(guī)定，還需要滿足保護(hù)行人頭部的性能要求。因此，對(duì)碳纖維增強(qiáng)樹(shù)脂基復(fù)合材料層合板的沖擊性能和損傷破壞開(kāi)展研究具有重要的理論意義，同時(shí)，探究層合板結(jié)構(gòu)用于發(fā)動(dòng)機(jī)罩時(shí)對(duì)行人頭部的保護(hù)性能具有一定的工程價(jià)值�；谝陨夏康模疚闹饕M(jìn)行了以下幾方面的研究： （1）設(shè)計(jì)了[0]10、[0/90/0/90/0]s和[0/90/45/-45/0]s三種不同鋪層方式的層合板，根據(jù)經(jīng)典層合板理論，推導(dǎo)了單層板和層合板的本構(gòu)關(guān)系，并計(jì)算了不同鋪層方式下的層合板剛度矩陣。 （2）采用熱壓成型工藝制作了如上所述三種鋪層方式的層合板，按照ASTM D7136/D7136M-12試驗(yàn)標(biāo)準(zhǔn)制成[0]10、[90]10、[0/90/0/90/0]s、[90/0/90/0/90]s、[0/90/45/-45/0]s、[90/0/-45/45/90]s六種試樣，并對(duì)每種試樣開(kāi)展了5J和25J兩種不同沖擊能量下的落錘沖擊試驗(yàn)。通過(guò)分析沖擊過(guò)程中的沖擊力、沖頭位移、能量和沖擊損傷情況，建立了沖擊響應(yīng)與沖擊損傷之間的聯(lián)系，并指出不同沖擊能量和不同鋪層方式下對(duì)于沖擊響應(yīng)和沖擊損傷的影響。 （3）利用ABAQUS建立了復(fù)合材料層合板落錘沖擊二維殼體有限元模型，，運(yùn)用Hashin累積損傷與失效法則來(lái)模擬層合板的漸進(jìn)失效。通過(guò)對(duì)比落錘沖擊試驗(yàn)數(shù)據(jù)，驗(yàn)證所建模型基本有效，并借助纖維拉伸、纖維壓縮、樹(shù)脂拉伸或剪切、樹(shù)脂壓縮四個(gè)損傷變量進(jìn)一步分析損傷發(fā)生的位置和損傷原因。 （4）利用ABAQUS建立了成人頭部沖擊器撞擊復(fù)合材料層合板的有限元模型，并使用工程分析軟件DIAdem計(jì)算頭部損傷指標(biāo)HIC值。分析了HIC值與撞擊時(shí)長(zhǎng)、最大侵入量和吸收能量的關(guān)系，并討論了不同鋪層方式對(duì)HIC值的影響。
[Abstract]:Energy saving, environmental protection and safety and comfort are the future development trend of automobile industry. In order to reduce automobile quality, fuel consumption and environmental pollution, carbon fiber reinforced resin matrix composites have attracted more and more attention. Carbon fiber composites (CFRP) have many advantages, such as light weight and high strength, strong designability, impact resistance and so on, and have good shock absorption performance and long service life. Therefore, carbon fiber composites have been used as outer panels and structural parts of trucks, passenger cars and passenger cars in automobile industry. Laminated plate is one of the most widely used structures in composite materials. In the process of manufacture, installation, maintenance and use, laminated plate structure will inevitably be subjected to external impact, and be damaged or even destroyed. Especially when applied to the automobile engine hood, according to the relevant regulations of pedestrian protection, it is also necessary to meet the performance requirements of the protection of the pedestrian head. Therefore, it is of great theoretical significance to study the impact properties and damage failure of carbon fiber reinforced resin matrix composite laminates. It has certain engineering value to explore the protective performance of laminated structure for the head of pedestrian when used in engine hood. Based on the above purposes, this paper mainly carried out the following aspects of research: In this paper, three kinds of laminates with different layering modes [0] 10, [0 / 90 / 0 / 90 / 0] s and [0 / 90 / 45 / -45] s are designed. According to the classical laminated plate theory, the constitutive relations between single layer plate and laminated plate are derived, and the stiffness matrix of laminated plate under different layering modes is calculated. (2) using the hot pressing process, we made laminated plates of the three kinds of layering described above, and made them into [0] 10, [90] 10, [0 / 90 / 90 / 0] s, [90 / 90 / 90 / 90] s, [90 / 90 / 45 / 0] s, [90 / 90% -45 / 45] s, according to the ASTM D7136/D7136M-12 test standard, and carried out a 5J and 25J hammer impact test on each sample. By analyzing the impact force, punch displacement, energy and impact damage, the relationship between impact response and impact damage is established. The effects of different impact energy and different layering modes on shock response and damage are also pointed out. (3) the finite element model of composite laminated plate with drop hammer impact is established by using ABAQUS. The cumulative damage and failure rule of Hashin is used to simulate the progressive failure of laminated plate. By comparing the impact test data of drop weight, it is proved that the model is basically effective, and the location and cause of damage are further analyzed with the help of four damage variables: fiber stretching, fiber compression, resin drawing or shearing, and resin compression. (4) the finite element model of adult head impact composite laminated plate is established by using ABAQUS, and the HIC value of head damage index is calculated by using the engineering analysis software DIAdem. The relationship between HIC value and impact time, maximum invasion amount and absorbed energy is analyzed, and the influence of different layering modes on HIC value is discussed.
【學(xué)位授予單位】：東華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ342.742;TB332

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 曹立波;廖洪波;;人-車碰撞時(shí)行人頭部撞擊特點(diǎn)及其試驗(yàn)評(píng)價(jià)方法研究[J];北京汽車;2007年04期

2 徐大偉;鄧亞?wèn)|;周榮;;歐日行人保護(hù)碰撞測(cè)試技術(shù)法規(guī)的比較研究[J];北京汽車;2007年05期

3 喬維高;王宇航;;汽車與行人碰撞中行人保護(hù)的研究現(xiàn)狀及發(fā)展趨勢(shì)[J];北京汽車;2008年04期

4 王宏雁;朱育民;吳丹;王華鋒;;基于行人保護(hù)的主動(dòng)式發(fā)動(dòng)機(jī)罩抬升裝置[J];交通科學(xué)與工程;2010年04期

5 程小全,張子龍,吳學(xué)仁;小尺寸試件層合板低速?zèng)_擊后的剩余壓縮強(qiáng)度[J];復(fù)合材料學(xué)報(bào);2002年06期

6 車曉;;我國(guó)汽車駕駛?cè)诉^(guò)2億 交通安全任重道遠(yuǎn)[J];道路交通管理;2013年03期

7 林智育;許希武;朱偉W

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